Thao Hong Phan, M.D.
Specialist · Union City, CA
Thao Hong Phan, M.D. is a specialist with a practice address in Union City, California, and NPI 1306849807, issued on May 27, 2005. Check the license (California A90577, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Thao Hong Phan
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- A90577 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3553 Whipple RD, Union City, CA 94587
- Phone
- (510) 454-1000
- Enumerated
- May 27, 2005
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050509000569); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Also registered at 3553 Whipple RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jaishree Acharya, M.D.Internal Medicine Physician1053334920
- Marie Agleham, MDAdult Medicine Physician1649298209
- Muhammad Aleem, M.D.Internal Medicine Physician1952480006
- Eleanor Anderson-Williams, M.D.Internal Medicine Physician1164576815
- Kristina Austin, M.D.Ophthalmology Physician1417007238
- Vijaya Basawaprasad, M.D.Internal Medicine Physician1588736326
Verify Thao Hong Phan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license A90577Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.0 times the Medicare Part D claims of the average specialist in 2024
6,909 Medicare Part D claims for 1,202 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 433 claims were for opioids.
Most prescribed
- Atorvastatin Calcium437 claims
- Amlodipine Besylate279 claims
- Losartan Potassium212 claims
- Levothyroxine Sodium193 claims
- Atenolol192 claims
- Simvastatin187 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: $24.32
1 payment: food and beverage; the largest payer was Dexcom, Inc. The 5,844 providers of this specialty with any payment received $4,760.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
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
- Permanente Medical Group IncSanta Clara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thao Hong Phan among 5,749 specialist records in California
Thao Hong Phan, M.D. is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated2001 · median 1989 among the 1,075 with a school on file
- Record last updated2021 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in California
There are 5,749 specialist records in California.
All 5,749 in California → Every provider in Union City → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Monica GuillenUnion City, CA 945871932921244
- Har Hiu Lam, M.D.Union City, CA 945871124190459
- Agnes LoUnion City, CA 945871013139831
- Aubrey MartinezUnion City, CA 945871750268199
- Lani UemuraUnion City, CA 945871104948686
- Marion Anthony, M.D.Pleasanton, CA 945881679577563
- Young Kang, MDPleasanton, CA 945881720050529
- Stephen Nares, MA, PPSCPleasanton, CA 945881497060412
Common questions
What is Thao Hong Phan, M.D.'s NPI number?
Thao Hong Phan, M.D.'s National Provider Identifier (NPI) is 1306849807, issued on May 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Thao Hong Phan, M.D. located?
The NPPES record lists a practice address at 3553 Whipple RD, Union City, CA, 94587. Phone: (510) 454-1000. Providers update this record themselves, so call before visiting.
How can I verify Thao Hong Phan, M.D.'s license?
NPPES lists California license number A90577, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Thao Hong Phan, M.D. prescribe under Medicare Part D?
In 2024, Thao Hong Phan, M.D. had 6,909 Medicare Part D claims for 1,202 beneficiaries; the average among specialist prescribers was 1,380. 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.