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 * Myriam Curet   2. Issuer Name and Ticker or Trading Symbol INTUITIVE SURGICAL INC [ISRG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) EVP & Chief Medical Officer (Last) (First) (Middle) 1020 KIFER ROAD 3. Date of Earliest Transaction (Month/Day/Year) 02/15/2019 (Street) SUNNYVALE, CA 94086 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 02/15/2019   M(1)   1,000 A $ 0 2,870 D   Common Stock 02/15/2019   M(2)   1,000 A $ 0 3,870 D   Common Stock 02/15/2019   F(1)   346 D $ 0 3,524 D   Common Stock 02/15/2019   F(2)   462 D $ 0 3,062 D

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

Non-Qualified Stock Option (right to buy)

$ 548.5

02/15/2019

A

3,500

(3)

02/15/2029

Common Stock

3,500

$ 0

3,500

D

Restricted Stock Units

$ 0

02/15/2019

M

1,000

(1)

02/15/2021

Common Stock

1,000

$ 0

1,999

D

Restricted Stock Units

$ 0

02/15/2019

A

2,333

(4)

02/15/2022

Common Stock

2,333

$ 0

6,333

D

Restricted Stock Units

$ 0

02/15/2019

M

1,000

(2)

02/15/2022

Common Stock

1,000

$ 0

5,333

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Myriam Curet 1020 KIFER ROAD SUNNYVALE, CA 94086			EVP & Chief Medical Officer

Signatures

By: Lori Serrano For: Myriam Curet		02/21/2019
**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 2/15/17, RSU shares were granted, vesting 25% per year over a four year period. RSUs convert into common stock on the vest date on a one-for-one basis. On 2/15/19, 25% of the shares were released and a portion of the shares were held back to cover the statutory tax withholding requirement. The net shares were deposited into the holders account
(2)	On 2/15/18, RSU shares were granted, vesting 25% per year over a four year period. RSUs convert into common stock on the vest date on a one-for-one basis. On 2/15/19, 25% of the shares were released and a portion of the shares were held back to cover the statutory tax withholding requirement. The net shares were deposited into the holders account
(3)	Non-statutory stock option granted pursuant to the 2010 Employee Stock Option Plan. The option vests 1/8th six months after the date of grant and 1/48th monthly thereafter.
(4)	Each Restricted Stock Unit, granted pursuant to the 2010 Employee Stock Option Plan, represents a contingent right to receive one share of Intuitive Surgical common stock. The grant vests 25% on the first anniversary of the date of grant and annually thereafter, over a four year period of time.

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