Allison Naiquan Zhang, MD
Gastroenterology Physician · San Jose, CA
Allison Naiquan Zhang, MD is a gastroenterology physician with a practice address in San Jose, California, and NPI 1821435900, issued on May 29, 2013. Check the license (California A165178, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Allison Naiquan Zhang
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A165178 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2585 Samaritan Dr Ste 25 2ND FL, San Jose, CA 95124
- Phone
- (650) 736-5555
- Enumerated
- May 29, 2013
- Record last updated
- Apr 12, 2024
- Medicare enrollment
- Enrolled (PECOS I20200713000020); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Verify Allison Naiquan Zhang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A165178Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% fewer Medicare Part D claims than the average gastroenterology physician in 2024
466 Medicare Part D claims for 293 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Gavilyte-G152 claims
- Omeprazole90 claims
- Peg-3350 And Electrolytes50 claims
- Sod Sulf-Potass Sulf-Mag Sulf39 claims
- Pantoprazole Sodium26 claims
- Esomeprazole Magnesium18 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.
One hospital affiliation
- Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Allison Naiquan Zhang among 2,140 gastroenterology physician records in California
Allison Naiquan Zhang, MD is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 80% of them.
- NPI issued2013 · 80% of these records are older, 17% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2013 · median 2002 among the 1,538 with a school on file
- Record last updated2024 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (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 Jose → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Marwan Balaa, MDSan Jose, CA 951241689652935
- Suejin Kim, MDSan Jose, CA 951241427282714
- Michael Kushlan, M.D.San Jose, CA 951241538273073
- Terry Lin, D.OSan Jose, CA 951241134258213
- Sheila Savur, M.D.San Jose, CA 951241194836585
- Geoffrey Spencer, MDSan Jose, CA 951241578625828
- David Stein, MDSan Jose, CA 951241760461719
- Alice Yang, M.D.San Jose, CA 951241669662896
Common questions
What is Allison Naiquan Zhang, MD's NPI number?
Allison Naiquan Zhang, MD's National Provider Identifier (NPI) is 1821435900, issued on May 29, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Allison Naiquan Zhang, MD located?
The NPPES record lists a practice address at 2585 Samaritan Dr Ste 25 2ND FL, San Jose, CA, 95124. Phone: (650) 736-5555. Providers update this record themselves, so call before visiting.
How can I verify Allison Naiquan Zhang, MD's license?
NPPES lists California license number A165178, 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 Allison Naiquan Zhang, MD prescribe under Medicare Part D?
In 2024, Allison Naiquan Zhang, MD had 466 Medicare Part D claims for 293 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.
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.