Has Yan Zhang, MD received payments from drug or device companies?

Yes. Drug and device makers reported $66 in general payments to Yan Zhang, MD across 3 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 Yan Zhang, 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 Yan Zhang, 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.

Yan Zhang, MD

Internal Medicine · El Monte, CANPI 1306884317

Payments from drug & device makers

$66in general payments, 2019–2025

Across 3 payments — averaging $22.13 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

Radius Health, Inc.$35
Grifols USA, LLC$19
Sunovion Pharmaceuticals Inc.$13

What the payments were for

Food & beverage$66100%

Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.

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
Radius Health, Inc.	1	$35
Grifols USA, LLC	1	$19
Sunovion Pharmaceuticals Inc.	1	$13

How this compares

$66 in reported general payments places this provider in the 35th percentile of 13,581 internal medicine providers in California.

See all internal medicine providers in California →

Medicare billing

Part B allowed, 2024

$1,948,736

Medicare patients

490

Services billed

17,157

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.

Most prescribed under Part D

Drug	Claims	Cost to plans & patients
Invega SustennaPaliperidone Palmitate	41	$117,445
EliquisApixaban	293	$75,606
SantylCollagenase Clostridium Hist.	18	$39,087
Divalproex Sodium	520	$17,884
XareltoRivaroxaban	64	$17,289
JanuviaSitagliptin Phosphate	42	$13,002
VascepaIcosapent Ethyl	54	$9,208
Icosapent Ethyl	40	$9,163
Atorvastatin Calcium	883	$9,140
RexultiBrexpiprazole	12	$9,126
Memantine Hcl	364	$8,945
TrulicityDulaglutide	13	$8,901
Levetiracetam	283	$8,594
Gabapentin	347	$7,333
AbrysvoRsv Vacc, Pref A And Pref B/Pf	22	$6,929

Paid to pharmacies, not to this prescriber.

Other internal medicine in El Monte

Andrew ChengSouth San Francisco$55.1M
Joel NeutelTustin$34.9M
Donald BrandonSan Diego$34M
William TownerLos Angeles$27.4M
Rahul AggarwalSan Francisco$24M
Masoud AzizadNorthridge$21.1M
Helen StaceyWalnut Creek$20.4M
Rohit Loombala Jolla$15.1M
Zeid KayaliColton$14.2M
Alexandra DrakakiSanta Monica$14.2M

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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