Regina B. Ha, PA-C
Physician Assistant · Fullerton, CA
Regina B. Ha, PA-C is a physician assistant with a practice address in Fullerton, California, and NPI 1730598400, issued on Aug 7, 2014. Check the license (California PA51623, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Regina B. Ha
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA51623 CA
Self-reported in NPPES; status is on the state search - Practice location
- 101 E Valencia Mesa Dr, Fullerton, CA 92835
- Phone
- (714) 871-3280
- Enumerated
- Aug 7, 2014
- Record last updated
- Nov 2, 2022
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 101 E Valencia Mesa Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daniel Abbott, MDEmergency Medicine Physician1518907864
- Nelson Aguinaga, RN, FNPFamily Nurse Practitioner1043909609
- Jonathon Ahn, MDAnesthesiology Physician1053803882
- Sora Ahn, RNCritical Care Medicine Registered Nurse1730026493
- Sherry Ansari, DPTPhysical Medicine & Rehabilitation Physician1467972992
- Tandeep Bains, PHARM.D.Pharmacist1568958114
Verify Regina B. Ha in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA51623Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average physician assistant in 2024
213 Medicare Part D claims for 104 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 46 claims were for opioids.
Most prescribed
- Ondansetron Odt58 claims
- Hydrocodone-Acetaminophen36 claims
- Cephalexin17 claims
- Ibuprofen16 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.
Regina B. Ha among 14,451 physician assistant records in California
Regina B. Ha, PA-C 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 2014, is newer than 38% of them.
- NPI issued2014 · 38% of these records are older, 59% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2022 · 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).
138 physician assistant records list a practice address in Fullerton
They are 138 of the 5,437 NPPES records with a practice address in Fullerton, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Fullerton → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Shannon Cornwell, PAFullerton, CA 928351902961626
- Negeen Farmand, PAFullerton, CA 928351255530168
- Suzanne Freesemann, P.A.Fullerton, CA 928351285750430
- Melinda Garcia, PAFullerton, CA 928351437226263
- Erica Gomez, DMSC, MPAP, PA-CFullerton, CA 928351316044282
- Andrea Inskeep, PA-CFullerton, CA 928351578752424
- Elethea Locke-Harris, PA-CFullerton, CA 928351528196169
- Laura Lowry, PAFullerton, CA 928351841408390
Common questions
What is Regina B. Ha, PA-C's NPI number?
Regina B. Ha, PA-C's National Provider Identifier (NPI) is 1730598400, issued on Aug 7, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Regina B. Ha, PA-C located?
The NPPES record lists a practice address at 101 E Valencia Mesa Dr, Fullerton, CA, 92835. Phone: (714) 871-3280. Providers update this record themselves, so call before visiting.
How can I verify Regina B. Ha, PA-C's license?
NPPES lists California license number PA51623, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Regina B. Ha, PA-C prescribe under Medicare Part D?
In 2024, Regina B. Ha, PA-C had 213 Medicare Part D claims for 104 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.