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 * SMITH LONNIE M   2. Issuer Name and Ticker or Trading Symbol INTUITIVE SURGICAL INC [ISRG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 1020 KIFER ROAD 3. Date of Earliest Transaction (Month/Day/Year) 02/01/2018 (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

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)

$ 168.41

02/01/2018

D

7,500

(1)

02/15/2022

Common Stock

7,500

$ 0 (2)

0

D

Non-Qualified Stock Option (right to buy)

$ 172.4367

02/01/2018

D

7,500

(1)

08/15/2022

Common Stock

7,500

$ 0 (2)

0

D

Non-Qualified Stock Option (right to buy)

$ 161.2667

02/01/2018

D

9,000

(1)

04/25/2023

Common Stock

9,000

$ 0 (2)

0

D

Non-Qualified Stock Option (right to buy)

$ 123.7733

02/01/2018

D

4,500

(1)

04/24/2024

Common Stock

4,500

$ 0 (2)

0

D

Non-Qualified Stock Option (right to buy)

$ 170.9233

02/01/2018

D

3,150

(1)

04/23/2025

Common Stock

3,150

$ 0 (2)

0

D

Non-Qualified Stock Option (right to buy)

$ 213.97

02/01/2018

D

1,329

(1)

04/21/2026

Common Stock

1,329

$ 0 (2)

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
SMITH LONNIE M 1020 KIFER ROAD SUNNYVALE, CA 94086	X

Signatures

By: Lori Serrano For: Lonnie M Smith		02/05/2018
**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)	100% of the shares subject to the option were fully vested and exercisable immediately prior to cancellation.
(2)	The option was cancelled with respect to the number of shares reported pursuant to an agreement between the reporting person and the issuer. The option cancellation was in partial satisfaction of the terms of a settlement of claims brought in a purported stockholder's derivative lawsuit against the reporting person, among other current and former officers and directors of the issuer, and the issuer as a nominal defendant.

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