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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(Print or Type Responses)

1. Name and Address of Reporting Person * Chan Phillip P.   2. Issuer Name and Ticker or Trading Symbol Cytosorbents Corp [CTSO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President and CEO (Last) (First) (Middle) C/O CYTOSORBENTS CORPORATION, 7 DEER PARK DRIVE, SUITE K 3. Date of Earliest Transaction (Month/Day/Year) 02/28/2018 (Street) MONMOUTH JUNCTION, NJ 08852 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ 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 Common Stock 02/28/2018   A   43,000 (2) A $ 0 430,413 (3) D

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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

Stock Option (right to buy)

$ 5.6

02/28/2018

A

95,200

(1)

02/24/2027

Common Stock

95,200

$ 0

95,200

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Chan Phillip P. C/O CYTOSORBENTS CORPORATION 7 DEER PARK DRIVE, SUITE K MONMOUTH JUNCTION, NJ 08852	X		President and CEO

Signatures

/s/ Phillip P. Chan		03/02/2018
**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)	On February 24, 2017, the reporting person was granted an option to purchase 112,000 shares of Common Stock pursuant to the CytoSorbents Corporation 2014 Long-Term Incentive Plan (the "Plan"), which was to vest upon achievement of certain performance goals as determined in the discretion of the Compensation Committee of the Board of Directors of CytoSorbents Corporation (the "Company"). This grant was reported on a Form 4 filed on February 28, 2017. On February 28, 2018, the Compensation Committee of the Board of Directors of the Company determined that 85% of such performance criteria was achieved during 2017, resulting in vesting of 95,200 shares underlying this option.
(2)	These shares represent restricted stock units which shall vest as to one-third of the award on each of the date of grant, the first anniversary of the date of grant, and the second anniversary of the date of grant, subject to the reporting person's continued service as of the applicable vesting date, and will be settled into common stock upon vesting.
(3)	Includes (i) the following restricted stock units ("RSUs") that will be settled into common stock upon vesting upon a "Change In Control" of Company, as defined in the Plan: (a) 18,700 RSUs granted on February 24, 2017, (b) 57,000 RSUs granted on June 7, 2016, and (c) 130,000 RSUs granted on April 8, 2015, (ii) the following RSUs subject to vesting as to one-third of the award on each of the date of grant, the first anniversary of the date of grant, and the second anniversary of the date of grant, subject to the reporting person's continued service as of the applicable vesting date, and will be settled into common stock upon vesting: (a) 13,542 of the RSUs granted to the reporting person on February 24, 2017 which are unvested as of the date hereof, (b) 8,667 of the RSUs granted on June 7, 2016 which are unvested as of the date hereof, and (c) 43,000 RSUs granted on February 28, 2018 and reported on this Form 4 and (iii) 159,504 shares of common stock owned by the reporting person.

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