FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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 *   Cohen Fred E 2. Date of Event Requiring Statement (Month/Day/Year) 11/13/2013 3. Issuer Name and Ticker or Trading Symbol TANDEM DIABETES CARE INC [TNDM] (Last) (First) (Middle) 301 COMMERCE STREET, SUITE 3300 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) FORT WORTH, TX 76102 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) No securities beneficially owned (1) (2) 0 D Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Cohen Fred E 301 COMMERCE STREET SUITE 3300 FORT WORTH, TX 76102	  X	Â	Â	Â

Signatures

/s/ Ronald Cami on behalf of Dr. Fred E. Cohen (3)		11/13/2013
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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)	Dr. Fred E. Cohen is a TPG Partner. TPG is affiliated with TPG Biotechnology Partners III, L.P. ("TPG Biotech III"), which holds shares of Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock of Tandem Diabetes Care, Inc. (the "Issuer") and warrants to purchase shares of Common Stock, par value $0.001 per share, of the Issuer ("Common Stock"). The shares of preferred stock of each series are convertible into shares of Common Stock.
(2)	Dr. Cohen disclaims beneficial ownership of all of the securities that are or may be beneficially owned by TPG Biotech III or any of its affiliates. Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), this filing shall not be deemed an admission that Dr. Cohen is, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owner of any equity securities of the Issuer for purposes of Section 16 of the Exchange Act or otherwise.
  Remarks: (3) Ronald Cami is signing on behalf of Dr. Cohen pursuant to the authorization and designation letter dated July 1, 2013, which was previously filed with the Securities and Exchange Commission.

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