Has Michael Dao, MD received payments from drug or device companies?

Yes. Drug and device makers reported $843,189 in general payments to Michael Dao, MD across 976 transactions between 2019–2025. Most Open Payments records nationally are meals worth under $20; a reported payment is not evidence of wrongdoing.

Does a payment mean Michael Dao, MD did something wrong?

No. Federal law requires drug and device makers to report almost every transfer of value to a physician, including a $14 sandwich at a lunch presentation. Consulting fees, research funding and royalties to device inventors are ordinary, legal parts of medicine. This site reports what was disclosed; it makes no allegation.

Where does this information about Michael Dao, MD come from?

The U.S. Centers for Medicare & Medicaid Services. Payments come from Open Payments, published under the Physician Payments Sunshine Act. Billing and prescribing figures come from the Medicare Physician & Other Practitioners and Part D Prescriber public use files for 2024.

Michael Dao, MD

Family Medicine · Garden Grove, CANPI 1033182951

Payments from drug & device makers

$843,189in general payments, 2019–2025

Across 976 payments — averaging $863.92 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

AstraZeneca$485K
Astrazeneca UK Limited$315K
Amgen$7K
AbbVie$6K
GSK$4K
Johnson & Johnson$3K
plus $22K from 54 others

General payments by program year

Who reported the general payments

Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.

Company	Payments	Total
AstraZeneca	117	$485,029
Astrazeneca UK Limited	2	$315,363
Amgen	86	$6,847
AbbVie(2 entities)	167	$6,282
GSK	89	$3,706
Johnson & Johnson(2 entities)	69	$3,488
Boehringer Ingelheim	36	$2,908
Lilly USA, LLC	50	$2,662
Novo Nordisk	41	$2,340
Gilead	38	$1,670
Bayer	12	$816
Amarin Pharma, Inc.	22	$779
Merck	15	$772
Phathom Pharmaceuticals, Inc.	8	$721
Nestle Healthcare Nutrition Inc.	25	$711
Ardelyx, Inc.	21	$628
Ironwood Pharmaceuticals, Inc	20	$515
Radius Health, Inc.	8	$501
Salix Pharmaceuticals, A Division Of Bausch Health US, LLC	6	$464
Vanda Pharmaceuticals Inc.	4	$413
Abbott	3	$395
Novartis	10	$388
Corcept Therapeutics	6	$367
Aimmune Therapeutics, Inc.	12	$348
Insulet Corporation	3	$347
Cequr Corporation	3	$326
Abiomed	3	$296
Biohaven Pharmaceuticals, Inc.	2	$251
Pfizer	7	$251
Axsome Therapeutics, Inc.	2	$247
Xeris Pharmaceuticals, Inc.	2	$237
Intercept Pharmaceuticals, Inc.	2	$234
Dexcom, Inc.	6	$234
Sumitomo Pharma America, Inc.	2	$214
Paratek Pharmaceuticals, Inc.	8	$190
Exact Sciences	4	$185
Bard Peripheral Vascular, Inc.	8	$173
Sanofi	2	$163
Otsuka America Pharmaceutical, Inc.	2	$155
Edwards Lifesciences	1	$152
Eisai Inc.	6	$146
Redhill Biopharma Inc.	1	$144
Biohaven Pharmaceutical Holding Company Ltd.	2	$138
Lundbeck LLC	6	$124
Lexicon Pharmaceuticals, Inc.	1	$116
Kowa Pharmaceuticals America, Inc.	5	$86
UCB, Inc.	1	$79
Tolmar, Inc.	3	$76
Baxter Healthcare	2	$61
Avion Pharmaceuticals	4	$61
IBSA Pharma Inc.	3	$58
Sanofi-aventis U.S. LLC	3	$56
Medtronic	3	$54
Optinose US, Inc.	2	$47
Takeda Pharmaceuticals U.S.A., Inc.	2	$44
Zimmer Biomet	2	$40
Oyster Point Pharma, Inc.	1	$20
Revance Therapeutics, Inc.	1	$20
Mylan Specialty L.p.	1	$18
Genentech USA, Inc.	1	$17

How this compares

$843,189 in reported general payments places this provider in the 95th percentile of 10,533 family medicine providers in California.

See all family medicine providers in California →

Medicare billing

Part B allowed, 2024

$113,926

Medicare patients

144

Services billed

987

What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.

Other family medicine in Garden Grove

Amina HaggagNorthridge$112.8M
Steven ReynoldsLong Beach$53M
Rizwana MohseniLake Forest$26.7M
Daniel JohnsonSan Diego$15.7M
Stacey LayleSan Diego$14.8M
Apinya VutikullirdCypress$14.3M
Hanid AudishSpring Valley$13.6M
Augusto FocilOxnard$12.6M
Jack VuLong Beach$10.1M
Suzanne FussellOxnard$8.9M

See the full list for California →

Where these figures come from

Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
Identity: NPPES NPI Registry, July 2026.

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