Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

Faber Tracy

2. Date of Event Requiring Statement (MM/DD/YYYY) 10/1/2019

3. Issuer Name and Ticker or Trading Symbol

MCKESSON CORP [MCK]

(Last) (First) (Middle)

6555 NORTH STATE HWY 161

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director _____ 10% Owner
___X___ Officer (give title below) _____ Other (specify below)
EVP, CHRO /

(Street)

IRVING, TX 75039

(City) (State) (Zip)

5. If Amendment, Date Original Filed(MM/DD/YYYY)

6. Individual or Joint/Group Filing(Check Applicable Line)

_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

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)
Common Stock	292.475 ⁽¹⁾	D

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		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)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Employee Stock Option (right-to-buy)	⁽²⁾	5/27/2021	Common Stock	2500	$183.37	D
Employee Stock Option (right-to-buy)	⁽³⁾	5/26/2022	Common Stock	2034	$237.86	D
Employee Stock Option (right-to-buy)	⁽⁴⁾	5/24/2023	Common Stock	3647	$182.77	D
Employee Stock Option (right-to-buy)	⁽⁵⁾	5/24/2023	Common Stock	835	$182.77	D
Employee Stock Option (right-to-buy)	⁽⁶⁾	5/23/2024	Common Stock	2893	$159.00	D
Employee Stock Option (right-to-buy)	⁽⁷⁾	5/30/2025	Common Stock	2811	$144.43	D
Restricted Stock Units (RSUs)	⁽⁸⁾	⁽⁸⁾	Common Stock	854	$0	D
Restricted Stock Units (RSUs)	⁽⁹⁾	⁽⁹⁾	Common Stock	629	$0	D
Restricted Stock Units (RSUs)	⁽¹⁰⁾	⁽¹⁰⁾	Common Stock	1305	$0	D
Restricted Stock Units (RSUs)	⁽¹¹⁾	⁽¹¹⁾	Common Stock	1154	$0	D
Restricted Stock Units (RSUs)	⁽¹²⁾	⁽¹²⁾	Common Stock	1510	$0	D
Restricted Stock Units (RSUs)	⁽¹³⁾	⁽¹³⁾	Common Stock	2308	$0	D

Explanation of Responses:
(1)	Includes 292.475 shares acquired in the ESPP.
(2)	The option vests 25% on 5/27/2015, 25% on 5/27/2016, 25% on 5/27/2017, 25% on 5/27/2018
(3)	The option vests 25% on 5/26/2016, 25% on 5/26/2017, 25% on 5/26/2018, 25% on 5/26/2019
(4)	The option vests 25% on 5/24/2017, 25% on 5/24/2018, 25% on 5/24/2019, 25% on 5/24/2020
(5)	The option vests 33% on 5/24/2017, 33% on 5/24/2018, 34% on 5/24/2019
(6)	The option vests 25% on 5/23/2018, 25% on 5/23/2019, 25% on 5/23/2020, 25% on 5/23/2021
(7)	The option vests 25% on 5/30/2019, 25% on 5/30/2020, 25% on 5/30/2021, 25% on 5/30/2022
(8)	The RSUs vest 100% on 5/23/2020
(9)	The RSUs vest 50% on 5/23/2019, 50% on 5/23/2021
(10)	The RSUs vest 100% on 5/30/2021
(11)	The RSUs vest 33% on 5/21/2020, 33% on 5/21/2021, 34% on 5/21/2022
(12)	The RSUs vest 100% on 5/21/2022
(13)	The RSUs vest 33% on 5/30/2019, 33% on 5/30/2020, 34% on 5/30/2021

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Faber Tracy 6555 NORTH STATE HWY 161 IRVING, TX 75039			EVP, CHRO