NPPES file of Aug 9, 2026

Yen N. Quang, M.D.

Gastroenterology Physician · San Francisco, CA

Yen N. Quang, M.D. is a gastroenterology physician with a practice address in San Francisco, California, and NPI 1326228487, issued on Nov 6, 2007. Check the license (California A101985, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1326228487
Name
Yen N. Quang
Credential
M.D.
Primary taxonomy
Gastroenterology Physician 207RG0100X
License number
A101985 CA
Self-reported in NPPES; status is on the state search
Practice location
1199 Bush St Ste 560, San Francisco, CA 94109
Phone
(415) 885-8080
Enumerated
Nov 6, 2007
Record last updated
Jun 11, 2018 (not updated in 8 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20131115001692); accepts Medicare assignment
Medical or professional school
Saint Louis University School Of Medicine, 2006
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Verify Yen N. Quang in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A101985    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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2% more Medicare Part D claims than the average gastroenterology physician in 2024

826 Medicare Part D claims for 334 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.

  1. Yen Quang826
  2. Specialty average811

Most prescribed

  1. Famotidine133 claims
  2. Sod Sulf-Potass Sulf-Mag Sulf129 claims
  3. Omeprazole107 claims
  4. Pantoprazole Sodium64 claims
  5. Vemlidy54 claims
  6. Linzess32 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $168.85

2 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Yen Quang$168.85
  2. Specialty average$5,015.95

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Quang Medical Practice IncSan Francisco, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Gastroenterology Physician providers in California

There are 2,140 gastroenterology physician records in California.

All 2,140 in California → Every provider in San Francisco →

Other gastroenterology physician records in California

  1. David Aarons, MDLodi, CA1619081379
  2. Constante Abaya, MDOxnard, CA1003918459
  3. Sadeea Abbasi, M.D., PH.D.Los Angeles, CA1366713513
  4. Basim Abdelkarim, MDUpland, CA1932217544
  5. Homan Abdollahzadeh, MDPalm Springs, CA1184634826
  6. John Abdulian, M.D.Fresno, CA1437114113
  7. Hussein Abidali, DORancho Cucamonga, CA1205274768
  8. Alaa Abousaif, MDOrange, CA1235124108
  9. Donald Abrahm, M.D.Newport Beach, CA1215022405
  10. Maria Abreu, M.D.West Hollywood, CA1598793374

Common questions

What is Yen N. Quang, M.D.'s NPI number?

Yen N. Quang, M.D.'s National Provider Identifier (NPI) is 1326228487, issued on Nov 6, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Yen N. Quang, M.D. located?

The NPPES record lists a practice address at 1199 Bush St Ste 560, San Francisco, CA, 94109. Phone: (415) 885-8080. Providers update this record themselves, so call before visiting.

How can I verify Yen N. Quang, M.D.'s license?

NPPES lists California license number A101985, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Yen N. Quang, M.D. prescribe under Medicare Part D?

In 2024, Yen N. Quang, M.D. had 826 Medicare Part D claims for 334 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.