Medicare Enrolled
Dr. Douglas Zhang, M.D.
Geriatric Medicine (Family Medicine) Physician · San Leandro, CA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Low-engagement
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Zhang from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Zhang
Dr. Douglas Zhang is a geriatric medicine physician in San Leandro, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Zhang performed 5,484 Medicare services across 2,335 unique beneficiaries.
Between the years covered by Open Payments, Dr. Zhang received a total of $33,706 from 61 pharmaceutical and/or device companies across 1119 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in geriatric medicine (family medicine) physician. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Zhang is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 19 years in practice
▲ Top 7% volume in CA
$33,706 industry payments
Medicare Practice Summary
Medicare Utilization ↗5,484
Medicare services
Top 7% in CA for geriatric medicine (family medicine) physician
2,335
Unique beneficiaries
$68
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~289 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
1,603 | $91 | $140 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
876 | $67 | $100 |
| Remote patient monitoring device, 30 days Initial setup of devices for remote monitoring of body functions with daily data transmission or alerts. This service covers the first 30 days of the monitoring period. |
820 | $51 | $110 |
| Chronic care management, first 20 min/month This service covers the first 20 minutes of clinical staff time directed by a healthcare professional each calendar month to manage chronic conditions. |
666 | $56 | $130 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
462 | $69 | $100 |
| Chronic care management, additional 20 min/month This service covers an extra 20 minutes of clinical staff time directed by a healthcare professional for managing two or more chronic conditions each calendar month. |
146 | $43 | $95 |
| Remote patient monitoring management, 20 min/month Management based on results from remote vital sign monitoring for the first 20 minutes per calendar month. |
132 | $44 | $100 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
129 | $153 | $160 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
100 | $29 | $30 |
| Flu vaccine, high-dose High-dose seasonal influenza vaccine for adults aged 65 and older. Contains four times the antigen of standard-dose flu vaccines (60 mcg per strain), split-virus formulation, preservative-free, single-dose syringe. |
96 | $54 | $55 |
| Remote vital sign monitoring management, each additional 20 minutes This code covers the time spent by a provider managing patient data from remote vital sign monitoring devices. It applies to each additional 20-minute increment beyond the initial monthly service period. |
83 | $34 | $80 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
76 | $61 | $160 |
| Electrocardiogram (EKG), 12-lead A standard heart rhythm test using at least 12 leads to record electrical activity. A healthcare provider interprets the results and provides a written report. |
70 | $10 | $85 |
| Complex chronic care management, first 60 minutes This service involves clinical staff time directed by a healthcare professional to manage two or more chronic conditions over a calendar month. It covers the first 60 minutes of this coordinated care effort. |
67 | $121 | $160 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
65 | $1 | $25 |
| Remote physiologic monitoring setup and education Initial setup of remote monitoring equipment and patient education on its use. |
38 | $20 | $50 |
| Ear wax removal A procedure to remove impacted ear wax from the ear canal. |
25 | $37 | $80 |
| Additional chronic care management time, 60 minutes This service covers an additional 60 minutes of clinical staff time directed by a healthcare professional for managing two or more chronic conditions, billed per calendar month. |
16 | $66 | $140 |
| Online digital evaluation for established patient, 5-10 minutes This service involves an online digital evaluation and management visit for an established patient. It covers a total time of 5 to 10 minutes over a period of up to 7 days. |
14 | $12 | $100 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
Industry Payment Transparency
Open Payments through 2024 ↗$33,706
Total received (2018-2024)
Avg $4,815/year across 7 years
Top 1% in CA for geriatric medicine (family medicine) physician
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
61
Companies
1,119
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$22,446 (66.6%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$11,160 (33.1%)
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$100 (0.3%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,612
2023
$2,431
2022
$3,288
2021
$3,660
2020
$3,659
2019
$3,977
2018
$15,080
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Novo Nordisk Inc
$203
AstraZeneca Pharmaceuticals LP
$196
Amgen Inc.
$148
PFIZER INC.
$145
ABBVIE INC.
$131
Lilly USA, LLC
$124
GlaxoSmithKline, LLC.
$110
Mylan Specialty L.P.
$96
Janssen Pharmaceuticals, Inc
$79
Astellas Pharma US Inc
$68
Merck Sharp & Dohme LLC
$62
Boehringer Ingelheim Pharmaceuticals, Inc.
$58
Dexcom, Inc.
$44
IDORSIA PHARMACEUTICALS US INC
$42
Abbott Laboratories
$25
Edwards Lifesciences Corporation
$22
Kowa Pharmaceuticals America, Inc.
$21
Exact Sciences Corporation
$19
Xeris Pharmaceuticals, Inc.
$17
Top 3 companies account for 33.9% of 2024 payments
All-time payments by company (2018-2024) ›
Abbott Laboratories
$11,185
GlaxoSmithKline, LLC.
$2,380
Novo Nordisk Inc
$2,217
Janssen Pharmaceuticals, Inc
$1,832
AstraZeneca Pharmaceuticals LP
$1,731
AbbVie, Inc.
$1,246
Boehringer Ingelheim Pharmaceuticals, Inc.
$997
Lilly USA, LLC
$970
PFIZER INC.
$884
ABBVIE INC.
$861
AbbVie Inc.
$750
Amgen Inc.
$668
Mylan Specialty L.P.
$618
Teva Pharmaceuticals USA, Inc.
$601
E.R. Squibb & Sons, L.L.C.
$600
Takeda Pharmaceuticals U.S.A., Inc.
$510
Merck Sharp & Dohme Corporation
$492
Amarin Pharma Inc.
$463
Novartis Pharmaceuticals Corporation
$427
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$422
SANOFI-AVENTIS U.S. LLC
$355
Allergan, Inc.
$334
Bayer Healthcare Pharmaceuticals Inc.
$288
Astellas Pharma US Inc
$255
Radius Health, Inc.
$218
Biohaven Pharmaceuticals, Inc.
$197
Biohaven Pharmaceutical Holding Company Ltd.
$183
Boston Scientific Corporation
$158
Bausch Health US, LLC
$138
Merck Sharp & Dohme LLC
$132
Bayer HealthCare Pharmaceuticals Inc.
$127
Otsuka America Pharmaceutical, Inc.
$124
Hologic, LLC
$109
IDORSIA PHARMACEUTICALS US INC
$106
Eisai Inc.
$104
COMSORT, Inc
$100
Genentech USA, Inc.
$93
SANOFI PASTEUR INC.
$86
VBI Vaccines (Delaware) Inc.
$80
Horizon Therapeutics plc
$72
Nalpropion Pharmaceuticals LLC
$56
Xeris Pharmaceuticals, Inc.
$49
VIVUS, Inc.
$48
Dexcom, Inc.
$44
Kowa Pharmaceuticals America, Inc.
$44
Exact Sciences Corporation
$43
Insulet Corporation
$41
MannKind Corporation
$34
Ultragenyx Pharmaceutical Inc.
$24
Oxford Immunotec USA Inc
$23
Edwards Lifesciences Corporation
$22
Alfasigma USA, Inc.
$21
VBI Vaccine (Delaware) Inc.
$20
Sumitomo Pharma America, Inc.
$20
Horizon Pharma plc
$20
Regeneron Healthcare Solutions, Inc.
$19
Alexion Pharmaceuticals, Inc.
$18
Sanofi Pasteur Inc.
$16
DEXCOM, INC.
$15
CeQur Corporation
$14
Medline Industries, Inc.
$4
Top 3 companies account for 46.8% of all-time payments
Associated products mentioned in payments ›
ADVAIR · AFREZZA · AIRSUPRA · AJOVY · ANORO · ANORO ELLIPTA · AREXVY · Aimovig · AirDuo Digihaler · BASAGLAR · BELSOMRA · BREO · BREZTRI · BYDUREON · CELL-DYN 3200 system · CHANTIX · COLOGUARD · COLOGUARD DNA CAPTURE REAGENTS · CONTRAVE · CREON · CeQur Simplicity · Cologuard Collection Kit · Creon · DALIRESP · DEXCOM G6 TRANSMITTER · Dayvigo · Dexcom G6 Transmitter · EDWARDS SAPIEN 3 TRANSCATHETER HEART VALVE (THV) · ELIQUIS · EMGALITY · ENTRESTO · EVENITY · FARXIGA · FASENRA · FLUBLOK QUADRIVALENT NORTHERN HEMISPHERE · FLUZONE HIGH-DOSE · FLUZONE QUADRIVALENT · FREESTYLE LIBRE 3 · GARDASIL · GEMTESA · GENERAL - PAIN MANAGEMENT · GLYXAMBI · GVOKE HYPOPEN · Humira · INVOKANA · JANUVIA · JARDIANCE · KRYSTEXXA · Kerendia · LEQVIO · LINZESS · LYRICA · Livalo · M-M-R II · MAVYRET · MIGRANAL · MOUNJARO · MOVANTIK · MYFEMBREE · MYRBETRIQ · Mavyret · Motegrity · Myrbetriq · NURTEC ODT · OFEV · Omnipod · Otezla · Ozempic · PAXLOVID · PNEUMOVAX 23 · PRADAXA · PRALUENT · PREVNAR - 13 · PREVNAR 13 · PREVNAR 20 · PreHevbrio · Prolia · QSYMIA · QULIPTA · QUVIVIQ · QVAR · RELISTOR · REXULTI · RYBELSUS · Repatha · Rybelsus · SHINGRIX · SIVEXTRO · SOLIQUA · SOLIQUA 100/33 · SPIRIVA RESPIMAT · STIOLTO RESPIMAT · SYMBICORT · SYNJARDY · Saxenda · Strensiq · TOUJEO · TOVIAZ · TRADJENTA · TRELEGY ELLIPTA · TRINTELLIX · TRULANCE · TRULICITY · TSPOT TB TEST · Thin Prep · ThinPrep · Thinprep · Tresiba · Trintellix · Tymlos · UBRELVY · VIAGRA · VIBERZI · VIIBRYD · VRAYLAR · Vascepa · Veozah · Victoza · WATCHMAN · WATCHMAN Access System · XARELTO · XIFAXAN · Xofluza · YUPELRI · Yupelri · ZORYVE · ZOSTAVAX
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Most payments (67%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 1% for geriatric medicine (family medicine) physician in CA.
Geographic Context
Geriatric medicine physicians within 10 mi
22
Per 100K population
1.3
County median income
$126,240
Nearest hospital
WILLOW ROCK CENTER
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Zhang is a clinical cardiology specialist, with above-average Medicare volume (top 7% in CA), with low-engagement industry engagement in the top 1% of CA peers, with 19 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Zhang experienced with office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Zhang performed 1,603 office visit, established patient (30-39 min) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Zhang receive payments from pharmaceutical companies?
Yes. Dr. Zhang received a total of $33,706 from 61 companies across 1,119 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Zhang's costs compare to other geriatric medicine physicians in San Leandro?
Dr. Zhang's average Medicare payment per service is $68. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Zhang) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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