Philip Oh, DO
Family Medicine Physician · Antioch, CA
Philip Oh, DO is a family medicine physician with a practice address in Antioch, California, and NPI 1841949641, issued on Mar 21, 2022. Check the license (California 20A23399, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Philip Oh
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A23399 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3400 Delta Fair Blvd, Antioch, CA 94509
- Phone
- (925) 813-6500
- Enumerated
- Mar 21, 2022
- Record last updated
- Aug 21, 2025
- Medicare enrollment
- Enrolled (PECOS I20250828004547); accepts Medicare assignment
- Medical or professional school
- William Carey University College Of Osteopathic Medicine, 2022
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 3400 Delta Fair Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Seema Cameron, MDFamily Medicine Physician1134369465
Verify Philip Oh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A23399Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average family medicine physician in 2024
216 Medicare Part D claims for 29 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Losartan Potassium17 claims
- Rosuvastatin Calcium13 claims
- Atorvastatin Calcium11 claims
- Furosemide11 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
- Permanente Medical Group IncRichmond, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Philip Oh among 17,133 family medicine physician records in California
Philip Oh, DO 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 2022, is newer than 94% of them.
- NPI issued2022 · 94% of these records are older, 3% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2022 · median 2005 among the 10,652 with a school on file
- Record last updated2025 · 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).
30 family medicine physician records list a practice address in Antioch
They are 30 of the 2,184 NPPES records with a practice address in Antioch, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Antioch → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Seema Cameron, MDAntioch, CA 945091134369465
- Randolph Clarke, M.D.Antioch, CA 945091538187612
- John Copeland, MDAntioch, CA 945091649259961
- James Edwards, M.D.Antioch, CA 945091508885005
- Talia Firestein, MDAntioch, CA 945091184966707
- Douglas Folsom, MDAntioch, CA 945091831260470
- Naoko Ikeda, DOAntioch, CA 945091952403909
- Hamidreza Khonsari, M.D.Antioch, CA 945091306874714
Common questions
What is Philip Oh, DO's NPI number?
Philip Oh, DO's National Provider Identifier (NPI) is 1841949641, issued on Mar 21, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Philip Oh, DO located?
The NPPES record lists a practice address at 3400 Delta Fair Blvd, Antioch, CA, 94509. Phone: (925) 813-6500. Providers update this record themselves, so call before visiting.
How can I verify Philip Oh, DO's license?
NPPES lists California license number 20A23399, 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 Philip Oh, DO prescribe under Medicare Part D?
In 2024, Philip Oh, DO had 216 Medicare Part D claims for 29 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.