Nina X. Trinh, M.D.
Rheumatology Physician · La Palma, CA
Nina X. Trinh, M.D. is a rheumatology physician with a practice address in La Palma, California, and NPI 1811915333, issued on Jul 17, 2006. Check the license (California A64931, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nina X. Trinh
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- A64931 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5451 LA Palma Ave, La Palma, CA 90623
- Phone
- (714) 670-1340
- Enumerated
- Jul 17, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (714) 443-3780
- Medicaid ID
- 00A649310 CA
- Medicare enrollment
- Enrolled (PECOS I20050825000983); accepts Medicare assignment
- Medical or professional school
- Hahneman Medical College Of The Pacific, 1996
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 5451 LA Palma Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Behrooz Ahmadi, M.DSpecialist1437248820
- Ruey Chang, P.A.Medical Physician Assistant1699064006
- Martin Garcia, M.D.Otolaryngology Physician1356344170
- Terrisa HaFamily Medicine Physician1083675516
- Gerald Ho, M.D.Rheumatology Physician1205833662
- Sarah Hwang, M.D.Rheumatology Physician1588682926
Verify Nina X. Trinh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A64931Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% more Medicare Part D claims than the average rheumatology physician in 2024
2,221 Medicare Part D claims for 497 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims. 36 claims were for opioids.
Most prescribed
- Prednisone332 claims
- Methotrexate286 claims
- Hydroxychloroquine Sulfate155 claims
- Amjevita(Cf) Autoinjector128 claims
- Enbrel Sureclick103 claims
- Leflunomide94 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
- Southern California Permanente Medical GroupGardena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nina X. Trinh among 926 rheumatology physician records in California
Nina X. Trinh, M.D. is one of 926 rheumatology 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1996 · median 2003 among the 641 with a school on file
- Record last updated2023 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in La Palma → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Gerald Ho, M.D.La Palma, CA 906231205833662
- Sarah Hwang, M.D.La Palma, CA 906231588682926
- Sandy Lee, DOLa Palma, CA 906231013404912
- Tandis Mahani, MDWhittier, CA 906031245818178
- Gilbert Gelfand, M.D.Whittier, CA 906021942247580
- Branden Ireifej, MDWhittier, CA 906021811524853
- Seyedehsara Seyedali, MDWhittier, CA 906021336554328
- Tien I Su, M.D.Whittier, CA 906021750581930
Common questions
What is Nina X. Trinh, M.D.'s NPI number?
Nina X. Trinh, M.D.'s National Provider Identifier (NPI) is 1811915333, issued on Jul 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nina X. Trinh, M.D. located?
The NPPES record lists a practice address at 5451 LA Palma Ave, La Palma, CA, 90623. Phone: (714) 670-1340. Providers update this record themselves, so call before visiting.
How can I verify Nina X. Trinh, M.D.'s license?
NPPES lists California license number A64931, 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 Nina X. Trinh, M.D. prescribe under Medicare Part D?
In 2024, Nina X. Trinh, M.D. had 2,221 Medicare Part D claims for 497 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.