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Exhibit 3.25

BYLAWS

OF

EASTERN REHAB, INC.

ARTICLE I.

Stockholders

Section 1.    Annual Meetings.

        The annual meeting of the stockholders of the Corporation shall be held on such date within the month of                        as may be fixed from time to time by the Board of Directors. Not less than ten nor more than 90 days' written or printed notice stating the place, day and hour of each annual meeting shall be given in the manner provided in Section 1 of Article IX hereof. The business to be transacted at the annual meetings shall include the election of directors, consideration and action upon the reports of officers and directors, and any other business within the power of the Corporation. All annual meetings shall be general meetings at which any business may be considered without being specified as a purpose in the notice unless otherwise required by law.

Section 2.    Special Meetings Called by Chairman of the Board, President or Board of Directors.

        At any time in the interval between annual meetings, special meetings of stockholders may be called by the Chairman of the Board, or by the President, or by the Board of Directors. Not less than ten days' nor more than 90 days' written notice stating the place, day and hour of such meeting and the matters proposed to be acted on thereat shall be given in the manner provided in Section 1 of Article IX. No business shall be transacted at any special meeting except that specified in the notice.

Section 3.    Special Meeting Called by Stockholders.

        Upon the request in writing delivered to the Secretary by the stockholders entitled to cast at least 25% of all the votes entitled to be cast at the meeting, it shall be the duty of the Secretary to call forthwith a special meeting of the stockholders. Such request shall state the purpose of such meeting and the matters proposed to be acted on thereat, and no other business shall be transacted at any such special meeting. The Secretary shall inform such stockholders of the reasonably estimated costs of preparing and mailing the notice of the meeting, and upon payment to the Corporation of such costs, the Secretary shall give not less than ten nor more than 90 days' notice of the time, place and purpose of the meeting in the manner provided in Section 1 of Article IX. If, upon payment of such costs the Secretary shall fail to issue a call for such meeting within ten days after the receipt of such payment (unless such failure is excused by law), then the stockholders entitled to cast 25% or more of the outstanding shares entitled to vote may do so upon giving not less than ten days' nor more than 90 days' notice of the time, place and purpose of the meeting in the manner provided in Section 1 of Article IX.

Section 4.    Place of Meetings.

        All meetings of stockholders shall be held at the principal office of the Corporation in the State of Maryland or at such other place within the United States as may be fixed from time to time by the Board of Directors and designated in the notice.

Section 5.    Quorum.

        At any meeting of stockholders the presence in person or by proxy of stockholders entitled to cast a majority of the votes thereat shall constitute a quorum. In the absence of a quorum, the stockholders present in person or by proxy, by majority vote and without notice other than by announcement, may

adjourn the meeting from time to time, but not for a period exceeding 60 days until a quorum shall attend.

Section 6.    Adjourned Meetings.

        A meeting of stockholders convened on the date for which it was called (or one adjourned to achieve a quorum as above provided in Section 5 of this Article) may be adjourned from time to time without further notice to a date not more than 120 days after the record date, and any business may be transacted at any adjourned meeting which could have been transacted at the meeting as originally called.

Section 7.    Voting.

        A majority of the votes cast at a meeting of stockholders, duly called and at which a quorum is present, shall be sufficient to take or authorize action upon any matter which may properly come before the meeting, unless more than a majority of votes cast is required by statute or by the Charter. The Board of Directors may fix the record date for the determination of stockholders entitled to vote in the manner provided in Article VIII, Section 3 of these Bylaws.

Section 8.    Proxies.

        A stockholder may vote the shares owned of record by him either in person or by proxy executed in writing and signed by the stockholder or by his duly authorized attorney-in-fact. Every proxy shall be dated, but need not be sealed, witnessed or acknowledged. No proxy shall be valid after 11 months from its date, unless otherwise provided in the proxy. In the case of stock held of record by more than one person, any co-owner or co-fiduciary may execute the proxy without the joinder of his co-owner(s) or co-fiduciary(ies), unless the Secretary of the Corporation is notified in writing by any co-owner or co-fiduciary that the joinder of more than one is to be required. At all meetings of stockholders, the proxies shall be filed with and verified by the Secretary of the Corporation, or, if the meeting shall so decide, by the Secretary of the meeting.

Section 9.    Order of Business.

        At all meetings of stockholders, any stockholder, present and entitled to vote in person or by proxy shall be entitled to require, by written request to the Chairman of the meeting, that the order of business shall be as follows:

        (1)   Organization

        (2)   Proof of notice of meeting or of waivers thereof. (The certificate of the Secretary of the Corporation, or the affidavit of any other person who mailed or published the notice or caused the same to be mailed or published, shall be proof of service of notice.)

        (3)   Submission by Secretary of the Corporation of a list of the stockholders entitled to vote, present in person or by proxy.

        (4)   A reading of unapproved minutes of preceding meetings and action thereon.

        (5)   Reports.

        (6)   If an annual meeting, or a special meeting called for that purpose, the election of directors.

        (7)   Unfinished business.

        (8)   New business.

        (9)   Adjournment.

Section 10.    Removal of Directors.

        At any special meeting of the stockholders called in the manner provided for by this Article, the stockholders, by the affirmative vote of a majority of all the votes entitled to be cast for the election of

directors, may remove any director or directors from office, with or without cause, and may elect a successor or successors to fill any resulting vacancies for the remainder of his or their terms.

Section 11.    Informal Action by Stockholders.

        Any action required or permitted to be taken at any meeting of stockholders may be taken without a meeting if a consent in writing setting forth such action is signed by all the stockholders entitled to vote thereon and such consent is filed with the records of stockholders' meetings.

ARTICLE II.

Directors

Section 1.    Powers.

        The business and affairs of the Corporation shall be managed under the direction of its Board of Directors. All powers of the Corporation may be exercised by or under the authority of the Board of Directors except as conferred on or reserved to the stockholders by law, by the Charter or by these Bylaws. A director need not be a stockholder. The Board of Directors shall keep minutes of its meetings and full and fair accounts of its transactions.

Section 2.    Number; Term of Office; Removal.

        The number of directors of the Corporation shall be not less than three or the same number as the number of stockholders, whichever is less; provided, however, that such number may be increased and thereafter decreased from time to time by vote of a majority of the entire Board of Directors to a number not exceeding three (3). The first directors of the Corporation shall hold their office until the first annual meeting of the Corporation, or until their successors are elected and qualify, and thereafter the directors shall hold office for the term of one year, or until their successors are elected and qualify. A director may be removed from office as provided in Article I, Section 10 of these Bylaws.

Section 3.    Annual Meeting; Regular Meetings.

        As soon as practicable after each annual meeting of stockholders, the Board of Directors shall meet for the purpose of organization and the transaction of other business. No notice of the annual meeting of the Board of Directors need be given if it is held immediately following the annual meeting of stockholders and at the same place. Other regular meetings of the Board of Directors may be held at such times and at such places, within or without the State of Maryland, as shall be designated in the notice for such meeting by the party making the call. All annual and regular meetings shall be general meetings, and any business may be transacted thereat.

Section 4.    Special Meetings.

        Special meetings of the Board of Directors may be called by the Chairman of the Board of the President, or by a majority of the directors.

Section 5.    Quorum; Voting.

        A majority of the Board of Directors shall constitute a quorum for the transaction of business at every meeting of the Board of Directors; but, if at any meeting there be less than a quorum present, a majority of those present may adjourn the meeting from time to time, but not for a period exceeding ten days at any one time or 60 days in all, without notice other than by announcement at the meeting, until a quorum shall attend. At any such adjourned meeting at which a quorum shall be present, any business may be transacted which might have been transacted at the meeting as originally called. Except as hereinafter provided or as otherwise provided by the Charter or by law, directors shall act by a vote of a majority of those members in attendance at a meeting at which a quorum is present.

Section 6.    Notice of Meetings.

        Notice of the time and place of every regular and special meeting of the Board of Directors shall be given to each director in the manner provided in Section 2 of Article IX hereof. Subsequent to each

Board meeting, and as soon as practicable thereafter, each director shall be furnished with a copy of the minutes of said meeting. At least 24 hours' notice shall be given of all meetings. The purpose of any meeting of the Board of Directors need not be stated in the notice.

Section 7.    Vacancies.

        (a)   If the office of a director becomes vacant for any reason other than removal or increase in the size of the Board, such vacancy may be filled by the Board by a vote of a majority of directors then in office, although such majority is less than a quorum.

        (b)   If the vacancy occurs as a result of the removal of a director, the stockholders may elect a successor or may delegate that authority to the Board of Directors.

        (c)   If the vacancy occurs as a result of an increase in the number of directors, it may be filled by vote of a majority of the entire Board of Directors.

        (d)   If the entire Board of Directors shall become vacant, any stockholder may call a special meeting in the same manner that the Chairman of the Board or the President may call such meeting, and directors for the unexpired term may be elected at such special meeting in the manner provided for their election at annual meetings.

        (e)   A director elected by the Board of Directors to fill a vacancy shall serve until the next annual meeting of stockholders and until his successor is elected and qualifies. A director elected by the stockholders to fill a vacancy shall serve for the unexpired term and until his successor is elected and qualifies.

Section 8.    Rules and Regulations.

        The Board of Directors may adopt such rules and regulations for the conduct of its meetings and the management of the affairs of the Corporation as it may deem proper and not inconsistent with the laws of the State of Maryland or these Bylaws or the Charter.

Section 9.    Executive Committee.

        The Board of Directors may constitute an Executive Committee, composed of at least two directors, from among its members. The Executive Committee shall hold office at the pleasure of the Board of Directors. Between sessions of the Board of Directors, such Committee shall have all of the powers of the Board of Directors in the management of the business and affairs of the Corporation, except those powers specifically denied by law. If any position on the Executive Committee becomes vacant, or if the number of members is increased, such vacancy may be filled by the Board of Directors. The taking of any action by the Executive Committee shall be conclusive evidence that the Board of Directors was not in session at the time of such action. The Executive Committee shall hold formal meetings and keep minutes of all of its proceedings. A copy of such minutes shall, after approval by the members of the Committee, be sent to all directors as a matter of information. Any action taken by the Executive Committee within the limits permitted by law shall have the force and effect of Board action unless and until revised or altered by the Board. The presence of not less than a majority of the Committee shall be necessary to constitute a quorum. Action may be taken with- out a meeting if unanimous written consent is signed by all of the members of the Committee, and if such consent is filed with the records of the Committee. The Executive Committee shall have the power to elect one of its members to serve as its Chairman unless the Board of Directors shall have designated such Chairman.

Section 10.    Compensation.

        The directors may receive a stated salary for their services, and/or fixed sum and expenses of attendance may be allowed for attendance fee, if any, shall be determined by resolution of the Board; provided, however, that nothing herein contained shall be construed as precluding a director from serving the Corporation in any other capacity and receiving compensation therefor.

Section 11.    Place of Meetings.

        Regular or special meetings of the Board may be held within or without the State of Maryland, as the Board may from time to time determine. The time and place of meeting may be fixed by the party making the call.

Section 12.    Informal Action by the Directors.

        Any action required or permitted to be taken at any meeting of the Board may be taken without a meeting, if a written consent to such action is signed by all members of the Board and such consent is filed with the minutes of the Board.

Section 13.    Telephone Conference.

        Members of the Board of Directors or any committee thereof may participate in a meeting of the Board or such committee by means of a conference telephone or similar communications equipment by means of which all persons participating in the meeting can hear each other at the same time and participation by such means shall constitute presence in person at the meeting.

ARTICLE III.

Officers

Section 1.    In General.

        The Board of Directors may choose a Chairman of the Board from among the directors. The Board of Directors shall elect a President, one or more Vice Presidents, a Treasurer, a Secretary, and such Assistant Secretaries and Assistant Treasurers as the Board may from time to time deem appropriate. All officers shall hold office only during the pleasure of the Board or until their successors are chosen and qualify. Any two of the above offices, except those of President and Vice President, may be held by the same person, but no officer shall execute, acknowledge or verify any instrument in more than one capacity when such instrument is required to be executed, acknowledged or verified by any two or more officers. The Board of Directors may from time to time appoint such other agents and employees with such powers and duties as the Board may deem proper. In its discretion, the Board of Directors may leave unfilled any offices except those of President, Treasurer and Secretary.

Section 2.    Chairman of the Board.

        The Chairman of the Board, if one is elected, shall have the responsibility for the implementation of the policies determined by the Board of Directors and for the administration of the business affairs of the Corporation. He shall preside over the meetings of the Board and of the stockholders at which he is present. He shall be the Chief Executive Officer of the Corporation if so designated by resolution of the Board.

Section 3.    President.

        The President shall have the responsibility for the active management of the business and general supervision and direction of all of the affairs of the Corporation. In the absence of a Chairman of the Board, he shall preside over the meetings of the Board and of the stockholders at which he shall be present, and shall perform such other duties as may be assigned to him by the Board of Directors or the Executive Committee. The President shall have the authority on the Corporation's behalf to endorse securities owned by the Corporation and to execute any documents requiring the signature of an executive officer. He shall perform such other duties as the Board of Directors may direct. He shall be the Chief Executive Officer of the Corporation unless the Chairman of the Board is so designated by resolution of the Board.

Section 4.    Vice Presidents.

        The Vice Presidents, in the order of priority designated by the Board of Directors, shall be vested with all the power and may perform all the duties of the President in his absence. They may perform

such other duties as may be prescribed by the Board of Directors or the Executive Committee or the President.

Section 5.    Treasurer.

        The Treasurer shall be the Chief financial officer of the Corporation and shall have general supervision over its finances. He shall perform such other duties as may be assigned to him by the Board of Directors or the President. If required by resolution of the Board, he shall furnish bond (which may be a blanket bond) with such surety and in such penalty for the faithful performance of his duties as the Board of Directors may from time to time require, the cost of such bond to be defrayed by the Corporation.

Section 6.    Secretary.

        The Secretary shall keep the minutes of the meetings of the stockholders and of the Board of Directors and shall attend to the giving and serving of all notices of the Corporation required by law or these Bylaws. He shall maintain at all times in the principal office of the Corporation at least one copy of the Bylaws with all amendments to date, and shall make the same, together with the minutes of the meeting of the stockholders, the annual statement of affairs of the Corporation and any voting trust or other stockholders agreement on file at the office of the Corporation, available for inspection by any officer, director or stockholder during reasonable business hours. He shall perform such other duties as may be assigned to him by the Board of Directors.

Section 7.    Assistant Treasurer and Secretary.

        The Board of Directors may designate from time to time Assistant Treasurers and Secretaries, who shall perform such duties as may from time to time be assigned to them by the Board of Directors or the President.

Section 8.    Compensation; Removal; Vacancies.

        The Board of Directors shall have power to fix the compensation of all officers of the Corporation. It may authorize any committee or officer, upon whom the power of appointing subordinate officers may have been conferred, to fix the compensation of such subordinate officers. The Board of Directors shall have the power at any regular or special meeting to remove any officer, if in the judgment of the Board the best interests of the Corporation will be served by such removal. The Board of Directors may authorize any officer to remove subordinate officers. The Board of Directors may authorize the Corporation's employment of an officer for a period in excess of the term of the Board. The Board of Directors at any regular or special meeting shall have power to fill a vacancy occurring in any office for the unexpired portion of the term.

Section 9.    Substitutes.

        The Board of Directors may from time to time in the absence of any one of its officers or at any other time, designate any other person or persons, on behalf of the Corporation to sign any contracts, deeds, notes or other instruments in the place or stead of any of such officers, and may designate any person to fill any one of said offices, temporarily or for any particular purpose; and any instruments so signed in accordance with a resolution of the Board shall be the valid act of the Corporation as fully as if executed by any regular officer.

ARTICLE IV.

Resignation

        Any director or officer may resign his office at any time. Such resignation shall be made in writing and shall take effect from the time of its receipt by the Corporation, unless some time be fixed in the resignation, and then from that date. The acceptance of a resignation shall not be required to make it effective.

ARTICLE V.

Commercial Paper, Etc.

        All bills, notes, checks, drafts and commercial paper of all kinds to be executed by the Corporation as maker, acceptor, endorser or otherwise, and all assignments and transfers of stock, contracts, or written obligations of the Corporation, and all negotiable instruments, shall be made in the name of the Corporation and shall be signed by any one or more of the following officers as the Board of Directors may from time to time designate, i.e. the Chairman of the Board, the President, any Vice President, or the Treasurer, or by such other person or persons as the Board of Directors or Executive Committee may from time to time designate.

ARTICLE VI.

Fiscal Year

        The fiscal year of the Corporation shall cover such period of 12 months as the Board of Directors may determine. In the absence of any such determination, the accounts of the Corporation shall be kept on a calendar year basis.

ARTICLE VII.

Seal

        The seal of the Corporation shall be in the form of two concentric circles inscribed with the name of the Corporation and the year and State in which it is incorporated. The Secretary or Treasurer, or any Assistant Secretary or Assistant Treasurer, shall have the right and power to attest to the corporate seal. In lieu of affixing the corporate seal to any document, it shall be sufficient to meet the requirements of any law, rule or regulation relating to a corporate seal to affix the word "(SEAL)" adjacent to the signature of the person authorized to sign the document on behalf of the Corporation.

ARTICLE VIII.

Stock

Section 1.    Issue.

        Each stockholder shall be entitled to a certificate or certificates which shall represent and certify the number and class of shares of stock owned by him in the Corporation. Each certificate shall be signed by the Chairman of the Board, the President or any Vice President, and countersigned by the Secretary or any Assistant Secretary or the Treasurer or any Assistant Treasurer, and sealed with the seal of the Corporation. The signatures of the Corporation's officers and its corporate seal appearing on stock certificates may be facsimiles if each such certificate is authenticated by the manual signature of an officer of a duly authorized transfer agent. Stock certificates shall be in such form not inconsistent with law or with the Charter, as shall be approved by the Board of Directors. In case any officer of the Corporation who has signed any certificate ceases to be an officer of the Corporation, whether by reason of death, resignation or otherwise, before such certificate is issued, then the certificate may nevertheless be issued by the Corporation with the same effect as if the officer had not ceased to be such officer as of the date of such issuance.

Section 2.    Transfers.

        The Board of Directors shall have power and authority to make all such rules and regulations as the Board may deem expedient concerning the issue, transfer and registration of stock certificates. The Board of Directors may appoint one or more transfer agents and/or registrars for its outstanding stock, and their duties may be combined. No transfer of stock shall be recognized or binding upon the Corporation until recorded on the books of the Corporation, or, as the case may be, of its transfer agent and/or of its registrar, upon surrender and cancellation of a certificate or certificates for a like number of shares.

Section 3.    Record Dates for Dividends and Stockholders' Meeting.

        The Board of Directors may fix a date not exceeding 90 days preceding the date of any meeting of stockholders, any dividend payment date of any date for the allotment of rights, as a record date for the determination of the stockholders entitled to notice of and to vote at such meeting, or entitled to receive such dividends or rights, as the case may be, and only stockholders of record on such date shall be entitled to notice of and to vote at such meeting or to receive such dividends or rights, as the case may be. In the case of a meeting of stockholders, the record date shall be fixed not less than ten days prior to the date of the meeting.

Section 4.    New Certificates.

        In case any certificate of stock is lost, stolen, mutilated or destroyed, the Board of Directors may authorize the issue of a new certificate in place thereof upon indemnity to the Corporation against loss and upon such other terms and conditions as it may deem advisable. The Board of Directors may delegate such power to any officer or officers of the Corporation or to any transfer agent or registrar of the Corporation; but the Board of Directors, such officer or officers or such transfer agent or registrar may, in their discretion, refuse to issue such new certificate save upon the order of some court having jurisdiction in the premises.

ARTICLE IX.

Notice

Section 1.    Notice to Stockholders.

        Whenever by law or these Bylaws notice is required to be given to any stockholder, such notice shall be in writing and may be given to each stockholder by leaving the same with him or at his residence or usual place of business, or by mailing it, postage prepaid, and addressed to him at his address as it appears on the books of the Corporation or its transfer agent. Such leaving or mailing of notice shall be deemed the time of giving such notice.

Section 2.    Notice to Directors and Officers.

        Whenever by law or these Bylaws notice is required to be given to any director or officer, such notice may be given in any one of the following ways: by personal notice to such director or officer, by telephone communication with such director or officer personally, by telegram, cablegram or radiogram, addressed to such director or officer at his then address or at his address as it appears on the books of the Corporation, or by depositing the same in writing in the post office or in a letter box in a postage paid, sealed wrapper addressed to such director or officer at his address as it appears on the books of the Corporation. The time when such notice shall be consigned to a communication company for delivery shall be deemed to be the time of the giving of such notice, and 48 hours after the time when such notice shall be mailed shall be deemed to be the time of the giving of such notice by mail.

Section 3.    Waiver of Notice.

        Notice to any stockholder or director of the time, place and/or purpose of any meeting of stockholders or directors required by these Bylaws may be dispensed with if such stockholder shall either attend in person or by proxy, or if such director shall attend in person, or if such absent stockholder or director shall, in writing filed with the records of the meeting either before or after the holding thereof, waive such notice.

ARTICLE X.

Voting of Stock in Other Corporations

        Any stock in other corporations, which may from time to time be held by the Corporation, may be represented and voted at any meeting of stockholders of such other corporations by the President or a Vice-President or by proxy or proxies appointed by the President or a Vice-President, or otherwise

pursuant to authorization thereunto given by a resolution of the Board of Directors adopted by a vote of a majority of the directors.

ARTICLE XI.

Indemnification

        To the maximum extent permitted by the Maryland law, the Corporation shall indemnify its currently acting and its former directors against any and all liabilities and expenses incurred in connection with their services in such capacities, shall indemnify its currently acting and its former officers to the full extent that indemnification shall be provided to directors, and shall indemnify, to the same extent, its employees and agents and persons who serve and have served, at its request as a director, officer, partner, trustee, employee or agent of another corporation, partnership, joint venture or other enterprise. The Corporation shall advance expenses to its directors, officers and the other persons referred to above to the extent permitted by Maryland law. The Board of Directors, may by Bylaw, resolution or agreement make further provision for indemnification of directors, officers, employees and agents to the extent permitted by Maryland law.

ARTICLE XII.

Amendments

        These Bylaws may be added to, altered, amended, repealed or suspended by a vote of a majority of the Board of Directors at any regular or special meeting of the Board.

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BYLAWS OF EASTERN REHAB, INC.