FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * ACCIPITER CAPITAL MANAGEMENT, LLC   2. Issuer Name and Ticker or Trading Symbol Emergency Medical Services CORP [EMS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 399 PARK AVENUE, 38TH FLOOR 3. Date of Earliest Transaction (Month/Day/Year) 08/17/2006 (Street) NEW YORK, NY 10022 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Common Stock 08/17/2006   S   6,600 D $ 14.0348 336,822 I By ALSF, LP (1) Class A Common Stock               318,639 I By ALSF (Offshore), Ltd. (2) Class A Common Stock               128,018 I By ALSF II (Offshore), Ltd. (3) Class A Common Stock               66,392 I By ALSF II (QP), LP (4) Class A Common Stock               204,497 I By ALSF II, LP (5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
ACCIPITER CAPITAL MANAGEMENT, LLC 399 PARK AVENUE 38TH FLOOR NEW YORK, NY 10022		X
HOFFMAN GABE 399 PARK AVENUE 38TH FLOOR NEW YORK, NY 10022		X
Candens Capital LLC 399 PARK AVENUE 38TH FLOOR NEW YORK, NY		X

Signatures

By: /s/ Gabe Hoffman, managing member		08/21/2006
**Signature of Reporting Person		Date
/s/ Hoffman, Gabe		08/21/2006
**Signature of Reporting Person		Date
By: /s/ Gabe Hoffman, managing member		08/21/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Held by Accipiter Life Sciences Fund, LP. Candens Capital, LLC, the general partner of Accipiter Life Sciences Fund, LP and Gabe Hoffman, the managing member of Candens Capital, LLC, disclaim beneficial ownership of these securities except to the extent of their pecuniary interest therin.
(2)	Held by Accipiter Life Sciences Fund (Offshore), Ltd. Accipiter Capital Management, LLC, the investment manager of Accipiter Life Sciences Fund (Offshore), Ltd. and Gabe Hoffman, the managing member of Accipiter Capital Management, LLC, disclaim beneficial ownership of these securities except to the extent of their pecuniary interest therein.
(3)	Held by Accipter Life Sciences Fund II (Offshore), Ltd. Accipiter Capital Management, LLC, the investment manager of Accipter Life Sciences Fund II (Offshore), Ltd. and Gabe Hoffman, the managing member of Accipiter Capital Managment, LLC, disclaim beneficial ownership of these securities except to the extent of their pecuniary interest therein.
(4)	Held by Accipter Life Sciences Fund II (QP), LP. Candens Capital, LLC, the general partner of Accipter Life Sciences Fund II (QP), LP and Gabe Hoffman, the managing member of Candens Capital, LLC, disclaim beneficial ownership of these securities except to the extent of their pecuniary interest therein.
(5)	Held by Accipiter Life Sciences Fund II, LP. Candens Capital, LLC, the general partner of Accipiter Life Sciences Fund II, LP and Gabe Hoffman, the managing member of Candens Capital, LLC, disclaim beneficial ownership of these securities except to the extent of their pecuniary interest therein.

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