Olivia Hoang-Oanh Tran, PA
Physician Assistant · Hollister, CA
Olivia Hoang-Oanh Tran, PA is a physician assistant with a practice address in Hollister, California, and NPI 1649779109, issued on Feb 9, 2018. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Olivia Hoang-Oanh Tran
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 591 Mccray St Ste 231, Hollister, CA 95023
- Phone
- (831) 636-3116
- Enumerated
- Feb 9, 2018
- Record last updated
- Feb 11, 2025
- Medicare enrollment
- Enrolled (PECOS I20191218002776); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 591 Mccray St Ste 231
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Olivia Hoang-Oanh Tran in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% more Medicare Part D claims than the average physician assistant in 2024
1,469 Medicare Part D claims for 142 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Atorvastatin Calcium132 claims
- Metformin Hcl84 claims
- Levothyroxine Sodium81 claims
- Lisinopril68 claims
- Amlodipine Besylate54 claims
- Losartan Potassium53 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: $642.84
29 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 64,719 providers of this specialty with any payment received $841.65 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.
One hospital affiliation
- Hazel Hawkins Memorial HospitalHollister, CA · Critical Access Hospitals
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
Olivia Hoang-Oanh Tran among 14,451 physician assistant records in California
Olivia Hoang-Oanh Tran, PA is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 52% of them.
- NPI issued2018 · 52% of these records are older, 44% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2018 · median 2018 among the 7,214 with a school on file
- Record last updated2025 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 physician assistant records list a practice address in Hollister
They are 16 of the 561 NPPES records with a practice address in Hollister, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Hollister → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Susana Frasher, PAHollister, CA 950231326077900
- Joseph Godbout, PA-CHollister, CA 950231578652855
- Lori Kraus, PAHollister, CA 950231497956262
- Roger Langford, PA-CHollister, CA 950231821211749
- Oskar Lizarraga-Davis, P.A.-CHollister, CA 950231932569357
- Sung Park, PA-CHollister, CA 950231093457194
- Jaidesh Reddick, PACHollister, CA 950231013099753
- Maria Saucedo-Arreola, PAHollister, CA 950231588770192
Common questions
What is Olivia Hoang-Oanh Tran, PA's NPI number?
Olivia Hoang-Oanh Tran, PA's National Provider Identifier (NPI) is 1649779109, issued on Feb 9, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Olivia Hoang-Oanh Tran, PA located?
The NPPES record lists a practice address at 591 Mccray St Ste 231, Hollister, CA, 95023. Phone: (831) 636-3116. Providers update this record themselves, so call before visiting.
How can I verify Olivia Hoang-Oanh Tran, PA's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Olivia Hoang-Oanh Tran, PA prescribe under Medicare Part D?
In 2024, Olivia Hoang-Oanh Tran, PA had 1,469 Medicare Part D claims for 142 beneficiaries; the average among physician assistant prescribers was 830. 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.