John Tran
Hospitalist Physician · Castro Valley, CA
John Tran is a hospitalist physician with a practice address in Castro Valley, California, and NPI 1104288182, issued on Mar 28, 2016. Check the license (California 20A16057, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Tran
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 20A16057 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20103 Lake Chabot RD, Castro Valley, CA 94546
- Phone
- (510) 727-3256
- Enumerated
- Mar 28, 2016
- Record last updated
- Sep 25, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (510) 727-3107
- Medicare enrollment
- Enrolled (PECOS I20200528003095); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 20103 Lake Chabot RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexei AdanEmergency Medicine Physician1679968978
- Maria Ait Rais, M.D.Hospitalist Physician1811239304
- Latricia Amadeo, RNRegistered Nurse1003407115
- Sandhya Ashokkumar, MDCritical Care Medicine (Internal Medicine) Physician1457913402
- Oluwaseyi Balasire, M.D.Hospitalist Physician1003235243
- Rachna Bali, DOHospitalist Physician1346541554
Verify John Tran in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A16057Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average hospitalist physician in 2024
171 Medicare Part D claims for 88 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen17 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.
Bills Medicare through one group practice
- Sutter Bay Medical FoundationCastro Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Tran among 3,099 hospitalist physician records in California
John Tran is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 70% of them.
- NPI issued2016 · 70% of these records are older, 26% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2016 · median 2010 among the 2,505 with a school on file
- Record last updated2019 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
29 hospitalist physician records list a practice address in Castro Valley
They are 29 of the 999 NPPES records with a practice address in Castro Valley, and 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Castro Valley → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Arash Foroutani, M.D.Castro Valley, CA 945461346267309
- Alina Haq, M.D.Castro Valley, CA 945461669665436
- Fatma Khakoo, MDCastro Valley, CA 945461326045196
- Pei-Fen Lin, MDCastro Valley, CA 945461740429885
- Daisy Maron, M.D.Castro Valley, CA 945461275565954
- Summaiya Muhammad, M.DCastro Valley, CA 945461841454535
- Tianli Pan, MDCastro Valley, CA 945461578783791
- Sindhu Radhakrishnan, MDCastro Valley, CA 945461497833073
Common questions
What is John Tran's NPI number?
John Tran's National Provider Identifier (NPI) is 1104288182, issued on Mar 28, 2016. An NPI identifies a provider in billing; it is not a license.
Where is John Tran located?
The NPPES record lists a practice address at 20103 Lake Chabot RD, Castro Valley, CA, 94546. Phone: (510) 727-3256. Providers update this record themselves, so call before visiting.
How can I verify John Tran's license?
NPPES lists California license number 20A16057, 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 John Tran prescribe under Medicare Part D?
In 2024, John Tran had 171 Medicare Part D claims for 88 beneficiaries; the average among hospitalist physician prescribers was 521. 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.