NPPES file of Aug 9, 2026

Thao Minh Phan, M.D.

Family Medicine Physician · Costa Mesa, CA

Thao Minh Phan, M.D. is a family medicine physician with a practice address in Costa Mesa, California, and NPI 1619113503, issued on Dec 23, 2008. Check the license (California A101844, 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
1619113503
Name
Thao Minh Phan
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
A101844 CA
Self-reported in NPPES; status is on the state search
Practice location
1170 Baker St Ste H1, Costa Mesa, CA 92626
Phone
(949) 791-3250
Enumerated
Dec 23, 2008
Record last updated
Jan 10, 2019 (not updated in 7 years: call before relying on the address or phone)
Fax
(949) 791-3251
Medicare enrollment
Enrolled (PECOS I20091019000584); accepts Medicare assignment
Medical or professional school
University Of California, San Diego 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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Also registered at 1170 Baker St Ste H1

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Matthew Ng, M.DFamily Medicine Physician1285830737
  2. Chrystene Nguyen, M.D.Family Medicine Physician1710123609
  3. Shayan Senaati, DOFamily Medicine Physician1083288625

Verify Thao Minh Phan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A101844
    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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8% fewer Medicare Part D claims than the average family medicine physician in 2024

3,262 Medicare Part D claims for 347 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 14 claims were for opioids.

  1. Thao Phan3,262
  2. Specialty average3,544

Most prescribed

  1. Atorvastatin Calcium288 claims
  2. Rosuvastatin Calcium248 claims
  3. Losartan Potassium185 claims
  4. Amlodipine Besylate171 claims
  5. Levothyroxine Sodium155 claims
  6. Metformin Hcl130 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

  1. Hoag ClinicCosta Mesa, CA

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

Thao Minh Phan among 17,133 family medicine physician records in California

Thao Minh Phan, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 53% of them.

  • NPI issued2008 · 53% of these records are older, 42% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated2006 · median 2005 among the 10,652 with a school on file
  • Record last updated2019 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

56 family medicine physician records list a practice address in Costa Mesa

They are 56 of the 4,286 NPPES records with a practice address in Costa Mesa, and 17,133 family medicine physician records in California.

The 8 family medicine physician records with the nearest ZIP codes

  1. Ronald Bangsil, MDCosta Mesa, CA 926261043261654
  2. David Chun, MDCosta Mesa, CA 926261932199213
  3. James Ferguson, DOCosta Mesa, CA 926261689625212
  4. Sienna Go, M.D.Costa Mesa, CA 926261295759298
  5. Guy Gottschalk, M.D.Costa Mesa, CA 926261235228750
  6. Joseph Horejsi, MDCosta Mesa, CA 926261295726347
  7. Michael Kao, M.D.Costa Mesa, CA 926261316953805
  8. Ena Kariya, MDCosta Mesa, CA 926261588655658

Common questions

What is Thao Minh Phan, M.D.'s NPI number?

Thao Minh Phan, M.D.'s National Provider Identifier (NPI) is 1619113503, issued on Dec 23, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Thao Minh Phan, M.D. located?

The NPPES record lists a practice address at 1170 Baker St Ste H1, Costa Mesa, CA, 92626. Phone: (949) 791-3250. Providers update this record themselves, so call before visiting.

How can I verify Thao Minh Phan, M.D.'s license?

NPPES lists California license number A101844, 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 Thao Minh Phan, M.D. prescribe under Medicare Part D?

In 2024, Thao Minh Phan, M.D. had 3,262 Medicare Part D claims for 347 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.