SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM 12B-25

                                                Commission File Number 333-19285
                                                                       ---------

                           NOTIFICATION OF LATE FILING

        (Check One):    [X] Form 10-KSB    [ ] Form 11-K    [ ] Form 20-F
                        [ ] Form 10-Q      [ ] Form N-SAR

   For Period Ended:  DECEMBER 31, 1999
                     -----------------------------------------------------------

[ ] Transition Report on Form 10-K      [ ]   Transition   Report  on Form 10-Q
[ ] Transition Report on Form 20-F      [ ]   Transition   Report  on Form N-SAR
[ ] Transition Report on Form 11-K

   For the Transition Period Ended:
                                   ---------------------------------------------

   READ ATTACHED INSTRUCTION SHEET BEFORE PREPARING FORM. PLEASE PRINT OR TYPE.

   Nothing in this form shall be construed to imply that the Commission has
verified any information contained herein.

   If the notification relates to a portion of the filing checked above,
identify Item(s) to which the notification relates:



                                    PART I
                             REGISTRANT INFORMATION

Full name of registrant     MPR HEALTH SYSTEMS, INC.
                        --------------------------------------------------------

Former name if applicable

  MYO DIAGNOSTICS, INC.
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Address of principal executive office (STREET AND NUMBER)

   3710 S. Robertson Blvd.
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City, State and Zip Code    Culver City, California 90232
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                                     Page 1



                                     PART II
                             RULE 12B-25 (B) AND (C)

   If the subject report could not be filed without unreasonable effort or
expense and the registrant seeks relief pursuant to Rule 12b-25(b), the
following should be completed. (Check box if appropriate.)

       (a) The reasons  described  in  reasonable  detail in Part III of this
           form could not be eliminated without unreasonable effort or expense;

[  ]   (b) The subject annual report, semi-annual report, transition report
           on Form 10-KSB, 20-F, 11-K or Form N-SAR, or portion thereof will be
           filed on or before the 15th calendar day following the prescribed
           due date; or the subject quarterly report or transition report on
           Form 10-Q, or portion thereof will be filed on or before the fifth
           calendar day following the prescribed due date; and

       (c) The accountant's statement or other exhibit required by Rule
           12b-25(c) has been attached if applicable.

                                    PART III
                                    NARRATIVE

   State below in reasonable detail the reasons why Form 10-KSB, 11-K, 20-F,
10-Q, N-SAR or the transition report portion thereof could not be filed within
the prescribed time period. (Attach extra sheets if needed.)

   The audit of the Company's financial statements is not complete.

                                     PART IV
                                OTHER INFORMATION

   (1) Name and telephone number of person to contact in regard to this
notification

            Gerald D. Appel            (310)                 559-5500
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                (Name)              (Area Code)         (Telephone number)

   (2) Have all other periodic reports required under Sections 13 or 15(d) of
the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act
of 1940 during the preceding 12 months or for such shorter period that the
registrant was required to file such report(s) been filed? If the answer is no,
identify report(s).

                                                            [XX] Yes   [  ] No

   (3) Is it anticipated that any significant change in results of operations
from the corresponding period for the last fiscal year will be reflected by the
earnings statements to be included in the subject report or portion thereof?

                                                            [  ] Yes   [XX] No

   If so: attach an explanation of the anticipated change, both narratively and
quantitatively, and, if appropriate, state the reasons why a reasonable estimate
of the results cannot be made.


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                             MPR HEALTH SYSTEMS, INC.
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                 (Name of registrant as specified in charter)

Has caused this notification to be signed on its behalf by the undersigned
thereunto duly authorized.

Date  March 30, 2000                    By  /S/ GERALD D. APPEL
     -------------------------------       -------------------------------------
                                        Name:   Gerald D. Appel
                                        Title:  President, Chief Executive
                                                Officer and Chairman of the
                                                Board