STOCK-BASED COMPENSATION	9 Months Ended
Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	STOCK-BASED COMPENSATION BioScrip Equity Incentive Plans Under the Company's Amended and Restated 2008 Equity Incentive Plan (as amended and restated, the “2008 Plan”), the Company may issue, among other things, incentive stock options (“ISOs”), non-qualified stock options (“NQSOs”), stock appreciation rights ("SARs"), restricted stock, performance shares and performance units to employees and directors. While SARS are authorized under the 2008 Plan, they may also be issued outside of the plan. Under the 2008 Plan, 3,580,000 shares were originally reserved for issuance (subject to adjustment for grants made under the Company's 2001 Incentive Stock Plan (the “2001 Plan”) after January 1, 2008, as well as for forfeitures, expirations or awards that under the 2001 Plan otherwise settled in cash after the adoption thereof). Upon the effective date of the 2008 Plan, the Company ceased making grants under the 2001 Plan. The 2008 Plan is administered by the Company's Management Development and Compensation Committee (the “Compensation Committee”), a standing committee of the Board of Directors. On June 10, 2010, the Company's stockholders approved an amendment to the 2008 Plan to increase the number of authorized shares of common stock available for issuance by 3,275,000 shares to 6,855,000 shares. On May 7, 2013, the Company's stockholders approved an amendment to the 2008 Plan to increase by 300,000 shares (from 500,000 to 800,000) the number of shares in the aggregate that may be subject to awards granted to directors. As of September 30, 2013, there were 738,325 shares that remained available for grant under the 2008 Plan. BioScrip/CHS Equity Plan Effective upon closing of the acquisition of CHS, the CHS 2006 Equity Incentive Plan was adopted by the Company and renamed the “BioScrip/CHS 2006 Equity Incentive Plan” (as amended and restated, the “BioScrip/CHS Plan”). There were 13,000,000 shares of CHS common stock originally authorized for issuance under the CHS 2006 Equity Incentive Plan, which were converted into 3,106,315 shares of BioScrip common stock, and adjusted using the exchange ratio defined by the merger agreement. The Board of Directors further amended the BioScrip/CHS Plan to provide for it to have substantially the same terms and provisions as the 2008 Plan. Of the options authorized and outstanding under the BioScrip/CHS Plan on the date of the acquisition, 716,086 options were designated as “rollover” options. These rollover options were issued to the top five executives of CHS at the time of the acquisition, and otherwise remain subject to the terms of the BioScrip/CHS Plan, as amended, and fully vested on the date of conversion. Under the terms of the BioScrip/CHS Plan, any shares of BioScrip common stock subject to rollover options that expire or otherwise terminate before all or any part of the shares subject to such options have been purchased as a result of the exercise of such options shall remain available for issuance under the BioScrip/CHS Plan. The remaining 2,390,229 shares are authorized for issuance under the BioScrip/CHS Plan. These shares may be used for awards under the BioScrip/CHS Plan, provided that awards using such available shares are not made after the date that awards or grants could have been made under the terms of the pre-existing plan, and are only made to individuals who were not employees or directors of BioScrip or an affiliate or subsidiary of BioScrip prior to such acquisition. As of September 30, 2013, there were 932,111 shares that remained available under the BioScrip/CHS Plan. Stock Options The Company recognized compensation expense related to stock options of $1.5 million and $1.1 million during the three months ended September 30, 2013 and 2012, respectively, and $4.8 million and $3.3 million during the nine months ended September 30, 2013 and 2012. Restricted Stock The Company recognized compensation expense related to restricted stock awards of $1.1 million and $0.2 million during the three months ended September 30, 2013 and 2012, respectively, and $2.4 million and $0.3 million during the nine months ended September 30, 2013 and 2012. Stock Appreciation Rights The Company recognized compensation (benefit) expense related to stock appreciation rights awards of $(1.3) million and $0.5 million during the three months ended September 30, 2013 and 2012, respectively, and $0.1 million and $0.8 million during the nine months ended September 30, 2013 and 2012. Employee Stock Purchase Plan On May 7, 2013, the Company's stockholders approved the BioScrip, Inc. Employee Stock Purchase Plan (the “ESPP”). The ESPP provides all eligible employees, as defined under the ESPP, the opportunity to purchase up to a maximum number of shares of Common Stock of the Company as determined by the Compensation Committee. Participants in the ESPP may acquire the Common Stock at a cost of 85% of the lower of the fair market value on the first or last day of the Plan Year from January 1st through December 31st. The Company has filed a Registration Statement on Form S-8 to register 750,000 shares of Common Stock, par value $0.0001 per share, for issuance under the ESPP. As of September 30, 2013, no shares have been issued and no expense has been incurred under the ESPP.

STOCK-BASED COMPENSATION

BioScrip Equity Incentive Plans

Under the Company's Amended and Restated 2008 Equity Incentive Plan (as amended and restated, the “2008 Plan”), the Company may issue, among other things, incentive stock options (“ISOs”), non-qualified stock options (“NQSOs”), stock appreciation rights ("SARs"), restricted stock, performance shares and performance units to employees and directors. While SARS are authorized under the 2008 Plan, they may also be issued outside of the plan. Under the 2008 Plan, 3,580,000 shares were originally reserved for issuance (subject to adjustment for grants made under the Company's 2001 Incentive Stock Plan (the “2001 Plan”) after January 1, 2008, as well as for forfeitures, expirations or awards that under the 2001 Plan otherwise settled in cash after the adoption thereof). Upon the effective date of the 2008 Plan, the Company ceased making grants under the 2001 Plan. The 2008 Plan is administered by the Company's Management Development and Compensation Committee (the “Compensation Committee”), a standing committee of the Board of Directors. On June 10, 2010, the Company's stockholders approved an amendment to the 2008 Plan to increase the number of authorized shares of common stock available for issuance by 3,275,000 shares to 6,855,000 shares. On May 7, 2013, the Company's stockholders approved an amendment to the 2008 Plan to increase by 300,000 shares (from 500,000 to 800,000) the number of shares in the aggregate that may be subject to awards granted to directors.

As of September 30, 2013, there were 738,325 shares that remained available for grant under the 2008 Plan.

BioScrip/CHS Equity Plan

Effective upon closing of the acquisition of CHS, the CHS 2006 Equity Incentive Plan was adopted by the Company and renamed the “BioScrip/CHS 2006 Equity Incentive Plan” (as amended and restated, the “BioScrip/CHS Plan”). There were 13,000,000 shares of CHS common stock originally authorized for issuance under the CHS 2006 Equity Incentive Plan, which were converted into 3,106,315 shares of BioScrip common stock, and adjusted using the exchange ratio defined by the merger agreement. The Board of Directors further amended the BioScrip/CHS Plan to provide for it to have substantially the same terms and provisions as the 2008 Plan.

Of the options authorized and outstanding under the BioScrip/CHS Plan on the date of the acquisition, 716,086 options were designated as “rollover” options. These rollover options were issued to the top five executives of CHS at the time of the acquisition, and otherwise remain subject to the terms of the BioScrip/CHS Plan, as amended, and fully vested on the date of conversion. Under the terms of the BioScrip/CHS Plan, any shares of BioScrip common stock subject to rollover options that expire or otherwise terminate before all or any part of the shares subject to such options have been purchased as a result of the exercise of such options shall remain available for issuance under the BioScrip/CHS Plan.

The remaining 2,390,229 shares are authorized for issuance under the BioScrip/CHS Plan. These shares may be used for awards under the BioScrip/CHS Plan, provided that awards using such available shares are not made after the date that awards or grants could have been made under the terms of the pre-existing plan, and are only made to individuals who were not employees or directors of BioScrip or an affiliate or subsidiary of BioScrip prior to such acquisition. As of September 30, 2013, there were 932,111 shares that remained available under the BioScrip/CHS Plan.

Stock Options

The Company recognized compensation expense related to stock options of $1.5 million and $1.1 million during the three months ended September 30, 2013 and 2012, respectively, and $4.8 million and $3.3 million during the nine months ended September 30, 2013 and 2012.

Restricted Stock

The Company recognized compensation expense related to restricted stock awards of $1.1 million and $0.2 million during the three months ended September 30, 2013 and 2012, respectively, and $2.4 million and $0.3 million during the nine months ended September 30, 2013 and 2012.

Stock Appreciation Rights

The Company recognized compensation (benefit) expense related to stock appreciation rights awards of $(1.3) million and $0.5 million during the three months ended September 30, 2013 and 2012, respectively, and $0.1 million and $0.8 million during the nine months ended September 30, 2013 and 2012.

Employee Stock Purchase Plan

On May 7, 2013, the Company's stockholders approved the BioScrip, Inc. Employee Stock Purchase Plan (the “ESPP”). The ESPP provides all eligible employees, as defined under the ESPP, the opportunity to purchase up to a maximum number of shares of Common Stock of the Company as determined by the Compensation Committee. Participants in the ESPP may acquire the Common Stock at a cost of 85% of the lower of the fair market value on the first or last day of the Plan Year from January 1st through December 31st. The Company has filed a Registration Statement on Form S-8 to register 750,000 shares of Common Stock, par value $0.0001 per share, for issuance under the ESPP. As of September 30, 2013, no shares have been issued and no expense has been incurred under the ESPP.