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

Yes. Drug and device makers reported $156,276 in general payments to Michael Castro, MD across 608 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 Castro, 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 Castro, 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 Castro, MD

Internal Medicine · Glendale, AZNPI 1639170293

Payments from drug & device makers

$156,276in general payments, 2019–2025

Across 608 payments — averaging $257.03 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

Sanofi US Services Inc.$75K
Ironwood Pharmaceuticals, Inc$65K
Amgen$2K
AstraZeneca$2K
Novo Nordisk$2K
AbbVie$1K
plus $9K 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
Sanofi US Services Inc.	13	$74,989
Ironwood Pharmaceuticals, Inc	10	$65,008
Amgen	46	$2,364
AstraZeneca	51	$2,315
Novo Nordisk	111	$1,727
AbbVie(2 entities)	73	$1,210
Pfizer	19	$697
Boston Scientific	18	$691
Abbott	24	$670
ZOLL Services LLC (a/k/a ZOLL Lifecor Corp)	13	$518
Edwards Lifesciences	7	$416
Lucid Diagnostics Inc.	10	$324
Medtronic(4 entities)	9	$317
Penumbra, Inc.	2	$297
Sanofi-aventis U.S. LLC	22	$297
Novartis	10	$260
Boehringer Ingelheim	12	$256
GSK	15	$250
Abiomed	3	$219
Radius Health, Inc.	12	$206
Nestle Healthcare Nutrition Inc.	10	$181
Corcept Therapeutics	4	$175
Merck	9	$158
Arbor Pharmaceuticals, Inc.	10	$156
Amarin Pharma, Inc.	6	$156
Biotronik Inc.	1	$148
Lilly USA, LLC	11	$146
Stemline Therapeutics Inc.	1	$142
Teva Pharmaceuticals USA, Inc.	2	$135
Eisai Inc.	7	$128
Johnson & Johnson(2 entities)	7	$125
Lexicon Pharmaceuticals, Inc.	1	$125
Mallinckrodt Hospital Products Inc.	1	$122
Astellas Pharma US Inc	1	$115
Alnylam Pharmaceuticals Inc.	3	$110
E.r. Squibb & Sons, L.L.C.	2	$109
Esperion Therapeutics, Inc.	5	$104
Bayer	6	$96
Alfasigma USA, Inc.	4	$85
Philips North America LLC	4	$63
Dendreon Pharmaceuticals LLC	2	$63
Biogen	3	$60
Akebia Therapeutics Inc	1	$57
Inspire Medical Systems, Inc.	2	$47
Salix Pharmaceuticals, A Division Of Bausch Health US, LLC	2	$39
Mannkind Corporation	3	$39
Kowa Pharmaceuticals America, Inc.	3	$37
Biohaven Pharmaceutical Holding Company Ltd.	2	$37
Dexcom, Inc.	2	$31
Dynavax Technologies Corporation	1	$28
Gilead	1	$27
Intuitive Surgical	1	$25
Teleflex LLC	1	$22
Axsome Therapeutics, Inc.	1	$20
Optos, Inc.	1	$19
Inari Medical, Inc.	1	$19
Otsuka America Pharmaceutical, Inc.	1	$19
Sanofi Pasteur Inc.	1	$18
Ultragenyx Pharmaceutical Inc.	1	$17
Paratek Pharmaceuticals, Inc.	1	$16

How this compares

$156,276 in reported general payments places this provider in the 95th percentile of 2,212 internal medicine providers in Arizona.

See all internal medicine providers in Arizona →

Medicare billing

Part B allowed, 2024

$163,688

Medicare patients

440

Services billed

1,492

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 internal medicine in Glendale

Gurdev SinghGlendale$649K
Christine HarterGlendale$127K
Yessica SachdevaMesa$13.7M
Louise TaberPhoenix$8.5M
Janelle WeyerChandler$5.5M
Robert MutterperlTucson$5.3M
Jalal AbbasSun City West$4.8M
Nebojsa SkrepnikTucson$4.7M
Philip MathewTempe$4.1M
Justin MoserScottsdale$3.9M

See the full list for Arizona →

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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