Covered recipient · General Payments record

MICHAEL ZANN MCMAHAN

Allopathic & Osteopathic Physicians Family Medicine

NPI: 1710064209
CMS profile: 258818
Location: OKLAHOMA CITY, OK

General Payments · PY2018–2024

$8,004.72

Reported across 416 records
CMS publication 2026-01-23

Latest program year · PY2024

$1,805.61

84 records · 0 disputed

Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.

How these totals are calculated

The total is the sum of the General Payments records CMS published for the labeled program year(s), exactly as published. Nothing is estimated, weighted, or combined across categories.
General Payments only. Research and Ownership/Investment are separate datasets and are never summed with these figures; amounts are kept separate per program year.
Featured-page threshold (a presentation gate, not a judgment): records>=3 OR total>=100 (all years).
Methodology & Data — sourcing, labeling, and limitations.

By nature of payment

PY2024 · sorted by reported total

Nature of payment	Amount	Records
Food and Beverage	$1,702.17	82
Education	$103.44	2

By paying entity

PY2024 · sorted by reported total

Paying entity	Amount	Records
PFIZER INC.	$266.10	12
NOVARTIS PHARMACEUTICALS CORPORATION	$234.33	11
Lilly USA, LLC	$213.16	10
Janssen Biotech, Inc.	$185.94	8
GENZYME CORPORATION	$169.33	6
ABBVIE INC.	$155.70	13
Regeneron Healthcare Solutions, Inc.	$132.87	6
SUN PHARMACEUTICAL INDUSTRIES INC.	$115.54	5
E.R. Squibb & Sons, L.L.C.	$110.26	6
Incyte Corporation	$94.99	1
Boehringer Ingelheim Pharmaceuticals, Inc.	$49.14	2
Amgen Inc.	$34.84	2
Dermavant Sciences, Inc.	$27.16	1
Arcutis Biotherapeutics, Inc.	$16.25	1

By program year

All program years on this page · sorted by year

Program year	Amount	Records
PY2018	$1,132.32	66
PY2019	$717.36	38
PY2020	$367.71	17
PY2021	$1,097.05	63
PY2022	$1,326.04	69
PY2023	$1,558.63	79
PY2024	$1,805.61	84

Payment records · PY2024 (84)

Sorted by paying entity, then date · as published by CMS

Program year 2024 2018 2019 2020 2021 2022 2023 Record-level detail is published for PY2024; earlier years are summarised in “By program year”.

Paying entity	Amount	Date	Nature of payment	Dispute status	Published	Record ID	Source
ABBVIE INC.	$4.61	01/25/2024	Food and Beverage	Undisputed	01/23/2026	1105008303	CMS
ABBVIE INC.	$8.45	03/08/2024	Education	Undisputed	01/23/2026	1105008305	CMS
ABBVIE INC.	$8.43	03/26/2024	Food and Beverage	Undisputed	01/23/2026	1105008307	CMS
ABBVIE INC.	$20.61	05/03/2024	Food and Beverage	Undisputed	01/23/2026	1105008309	CMS
ABBVIE INC.	$8.08	05/07/2024	Food and Beverage	Undisputed	01/23/2026	1105008311	CMS
ABBVIE INC.	$14.16	05/10/2024	Food and Beverage	Undisputed	01/23/2026	1105008313	CMS
ABBVIE INC.	$17.96	06/21/2024	Food and Beverage	Undisputed	01/23/2026	1105008315	CMS
ABBVIE INC.	$22.39	07/23/2024	Food and Beverage	Undisputed	01/23/2026	1105008317	CMS
ABBVIE INC.	$11.48	09/13/2024	Food and Beverage	Undisputed	01/23/2026	1105008319	CMS
ABBVIE INC.	$12.83	10/11/2024	Food and Beverage	Undisputed	01/23/2026	1105008321	CMS
ABBVIE INC.	$7.43	10/18/2024	Food and Beverage	Undisputed	01/23/2026	1105008323	CMS
ABBVIE INC.	$13.10	10/25/2024	Food and Beverage	Undisputed	01/23/2026	1105008325	CMS
ABBVIE INC.	$6.17	11/08/2024	Food and Beverage	Undisputed	01/23/2026	1105008327	CMS
Amgen Inc.	$17.91	01/23/2024	Food and Beverage	Undisputed	01/23/2026	1117325161	CMS
Amgen Inc.	$16.93	10/08/2024	Food and Beverage	Undisputed	01/23/2026	1117325163	CMS
Arcutis Biotherapeutics, Inc.	$16.25	02/10/2024	Food and Beverage	Undisputed	01/23/2026	1121064635	CMS
Boehringer Ingelheim Pharmaceuticals, Inc.	$33.18	01/19/2024	Food and Beverage	Undisputed	01/23/2026	1118121923	CMS
Boehringer Ingelheim Pharmaceuticals, Inc.	$15.96	07/09/2024	Food and Beverage	Undisputed	01/23/2026	1118121925	CMS
Dermavant Sciences, Inc.	$27.16	11/12/2024	Food and Beverage	Undisputed	01/23/2026	1127905438	CMS
E.R. Squibb & Sons, L.L.C.	$18.85	02/02/2024	Food and Beverage	Undisputed	01/23/2026	1101801684	CMS
E.R. Squibb & Sons, L.L.C.	$15.09	03/08/2024	Food and Beverage	Undisputed	01/23/2026	1101801698	CMS
E.R. Squibb & Sons, L.L.C.	$21.66	06/26/2024	Food and Beverage	Undisputed	01/23/2026	1101801735	CMS
E.R. Squibb & Sons, L.L.C.	$15.72	07/12/2024	Food and Beverage	Undisputed	01/23/2026	1101801754	CMS
E.R. Squibb & Sons, L.L.C.	$24.49	08/20/2024	Food and Beverage	Undisputed	01/23/2026	1101801777	CMS
E.R. Squibb & Sons, L.L.C.	$14.45	12/04/2024	Food and Beverage	Undisputed	01/23/2026	1101801858	CMS
GENZYME CORPORATION	$23.15	02/23/2024	Food and Beverage	Undisputed	01/23/2026	1139789285	CMS
GENZYME CORPORATION	$32.13	03/01/2024	Food and Beverage	Undisputed	01/23/2026	1139789287	CMS
GENZYME CORPORATION	$38.74	04/02/2024	Food and Beverage	Undisputed	01/23/2026	1139789293	CMS
GENZYME CORPORATION	$22.00	06/05/2024	Food and Beverage	Undisputed	01/23/2026	1139789305	CMS
GENZYME CORPORATION	$24.81	09/11/2024	Food and Beverage	Undisputed	01/23/2026	1139789329	CMS
GENZYME CORPORATION	$28.50	10/25/2024	Food and Beverage	Undisputed	01/23/2026	1139789339	CMS
Incyte Corporation	$94.99	02/20/2024	Education	Undisputed	01/23/2026	1141172797	CMS
Janssen Biotech, Inc.	$23.54	02/06/2024	Food and Beverage	Undisputed	01/23/2026	1078530839	CMS
Janssen Biotech, Inc.	$22.24	03/13/2024	Food and Beverage	Undisputed	01/23/2026	1078529468	CMS
Janssen Biotech, Inc.	$23.32	04/16/2024	Food and Beverage	Undisputed	01/23/2026	1078531318	CMS
Janssen Biotech, Inc.	$21.83	06/05/2024	Food and Beverage	Undisputed	01/23/2026	1078528391	CMS
Janssen Biotech, Inc.	$26.09	07/19/2024	Food and Beverage	Undisputed	01/23/2026	1078531511	CMS
Janssen Biotech, Inc.	$23.83	09/11/2024	Food and Beverage	Undisputed	01/23/2026	1078528196	CMS
Janssen Biotech, Inc.	$22.00	10/23/2024	Food and Beverage	Undisputed	01/23/2026	1078529587	CMS
Janssen Biotech, Inc.	$23.09	12/17/2024	Food and Beverage	Undisputed	01/23/2026	1078529864	CMS
Lilly USA, LLC	$34.32	01/12/2024	Food and Beverage	Undisputed	01/23/2026	1135201017	CMS
Lilly USA, LLC	$17.55	02/02/2024	Food and Beverage	Undisputed	01/23/2026	1135191969	CMS
Lilly USA, LLC	$24.18	03/12/2024	Food and Beverage	Undisputed	01/23/2026	1135200185	CMS
Lilly USA, LLC	$15.73	04/04/2024	Food and Beverage	Undisputed	01/23/2026	1135236849	CMS
Lilly USA, LLC	$14.93	04/12/2024	Food and Beverage	Undisputed	01/23/2026	1135200187	CMS
Lilly USA, LLC	$27.13	05/17/2024	Food and Beverage	Undisputed	01/23/2026	1135173180	CMS
Lilly USA, LLC	$15.84	06/14/2024	Food and Beverage	Undisputed	01/23/2026	1135201347	CMS
Lilly USA, LLC	$23.88	06/21/2024	Food and Beverage	Undisputed	01/23/2026	1135201345	CMS
Lilly USA, LLC	$19.03	10/11/2024	Food and Beverage	Undisputed	01/23/2026	1135201019	CMS
Lilly USA, LLC	$20.57	11/08/2024	Food and Beverage	Undisputed	01/23/2026	1135173182	CMS
Novartis Pharmaceuticals Corporation	$7.13	02/14/2024	Food and Beverage	Undisputed	01/23/2026	1087052450	CMS
Novartis Pharmaceuticals Corporation	$8.93	03/06/2024	Food and Beverage	Undisputed	01/23/2026	1087052452	CMS
Novartis Pharmaceuticals Corporation	$25.74	04/26/2024	Food and Beverage	Undisputed	01/23/2026	1087052456	CMS
Novartis Pharmaceuticals Corporation	$25.86	05/31/2024	Food and Beverage	Undisputed	01/23/2026	1087052460	CMS
Novartis Pharmaceuticals Corporation	$33.59	06/11/2024	Food and Beverage	Undisputed	01/23/2026	1087052458	CMS
Novartis Pharmaceuticals Corporation	$9.56	06/28/2024	Food and Beverage	Undisputed	01/23/2026	1087052462	CMS
Novartis Pharmaceuticals Corporation	$29.34	07/16/2024	Food and Beverage	Undisputed	01/23/2026	1087052464	CMS
Novartis Pharmaceuticals Corporation	$22.67	09/06/2024	Food and Beverage	Undisputed	01/23/2026	1087052466	CMS
Novartis Pharmaceuticals Corporation	$30.76	10/04/2024	Food and Beverage	Undisputed	01/23/2026	1087052468	CMS
Novartis Pharmaceuticals Corporation	$11.91	11/14/2024	Food and Beverage	Undisputed	01/23/2026	1087052470	CMS
Novartis Pharmaceuticals Corporation	$28.84	12/09/2024	Food and Beverage	Undisputed	01/23/2026	1087052472	CMS
PFIZER INC.	$22.22	01/30/2024	Food and Beverage	Undisputed	01/23/2026	1131126465	CMS
PFIZER INC.	$25.02	02/21/2024	Food and Beverage	Undisputed	01/23/2026	1131040166	CMS
PFIZER INC.	$24.18	03/26/2024	Food and Beverage	Undisputed	01/23/2026	1131220451	CMS
PFIZER INC.	$9.75	04/16/2024	Food and Beverage	Undisputed	01/23/2026	1131593089	CMS
PFIZER INC.	$27.81	04/30/2024	Food and Beverage	Undisputed	01/23/2026	1131345157	CMS
PFIZER INC.	$17.16	05/21/2024	Food and Beverage	Undisputed	01/23/2026	1131479442	CMS
PFIZER INC.	$23.45	06/04/2024	Food and Beverage	Undisputed	01/23/2026	1131667241	CMS
PFIZER INC.	$30.21	07/30/2024	Food and Beverage	Undisputed	01/23/2026	1131788451	CMS
PFIZER INC.	$20.36	09/24/2024	Food and Beverage	Undisputed	01/23/2026	1131952120	CMS
PFIZER INC.	$27.63	11/05/2024	Food and Beverage	Undisputed	01/23/2026	1131015827	CMS
PFIZER INC.	$20.97	12/03/2024	Food and Beverage	Undisputed	01/23/2026	1131174140	CMS
PFIZER INC.	$17.34	12/17/2024	Food and Beverage	Undisputed	01/23/2026	1131420564	CMS
Regeneron Healthcare Solutions, Inc.	$23.15	01/09/2024	Food and Beverage	Undisputed	01/23/2026	1114112421	CMS
Regeneron Healthcare Solutions, Inc.	$12.16	05/03/2024	Food and Beverage	Undisputed	01/23/2026	1114112423	CMS
Regeneron Healthcare Solutions, Inc.	$22.24	09/18/2024	Food and Beverage	Undisputed	01/23/2026	1114112425	CMS
Regeneron Healthcare Solutions, Inc.	$27.84	10/08/2024	Food and Beverage	Undisputed	01/23/2026	1114112427	CMS
Regeneron Healthcare Solutions, Inc.	$22.69	11/22/2024	Food and Beverage	Undisputed	01/23/2026	1114112429	CMS
Regeneron Healthcare Solutions, Inc.	$24.79	12/13/2024	Food and Beverage	Undisputed	01/23/2026	1114112431	CMS
SUN PHARMACEUTICAL INDUSTRIES INC.	$21.72	02/28/2024	Food and Beverage	Undisputed	01/23/2026	1152183121	CMS
SUN PHARMACEUTICAL INDUSTRIES INC.	$23.71	04/10/2024	Food and Beverage	Undisputed	01/23/2026	1152183129	CMS
SUN PHARMACEUTICAL INDUSTRIES INC.	$22.44	05/21/2024	Food and Beverage	Undisputed	01/23/2026	1152183123	CMS
SUN PHARMACEUTICAL INDUSTRIES INC.	$25.40	07/02/2024	Food and Beverage	Undisputed	01/23/2026	1152183127	CMS
SUN PHARMACEUTICAL INDUSTRIES INC.	$22.27	07/22/2024	Food and Beverage	Undisputed	01/23/2026	1152183125	CMS

Source & provenance

Dataset: CMS Open Payments — General Payments
Publisher of source data: Centers for Medicare & Medicaid Services
CMS publication date: 2026-01-23
Program years on this page: 2018, 2019, 2020, 2021, 2022, 2023, 2024
Source files: Dataset page · Bulk file · PY2018 , PY2019 , PY2020 , PY2021 , PY2022 , PY2023 , PY2024
Generated from: OP_DTL_GNRL_PGYR2024_P01232026_01102026.csv

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Corrections to the substance of a record route to CMS through its review-and-dispute process; errors in how this site mirrors or displays a record route to us. Both paths are described in Methodology & Data.