Grace Catherine Thomas, PA-C
Physician Assistant · Tustin, CA
Grace Catherine Thomas, PA-C is a physician assistant with a practice address in Tustin, California, and NPI 1346005089, issued on Feb 20, 2024. Check the license (California 63870, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Grace Catherine Thomas
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 63870 CA
Self-reported in NPPES; status is on the state search - Practice location
- 17612 17TH St, Tustin, CA 92780
- Phone
- (714) 243-5450
- Enumerated
- Feb 20, 2024
- Record last updated
- Feb 20, 2024
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 17612 17TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Grace Catherine Thomas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 63870Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average physician assistant in 2024
335 Medicare Part D claims for 225 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Methylprednisolone89 claims
- Fluticasone Propionate30 claims
- Mupirocin22 claims
- Sulfamethoxazole-Trimethoprim20 claims
- Nitrofurantoin Mono-Macro18 claims
- Azithromycin16 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: $130.54
1 payment: food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. 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.
Grace Catherine Thomas among 14,451 physician assistant records in California
Grace Catherine Thomas, 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 2024, is newer than 87% of them.
- NPI issued2024 · 87% of these records are older, 7% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2024 · 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).
52 physician assistant records list a practice address in Tustin
They are 52 of the 2,221 NPPES records with a practice address in Tustin, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Tustin → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Marlie Abrahams, PA-CTustin, CA 927801639409048
- Adela Ashraf, PA-CTustin, CA 927801356385215
- Heather Bonnville, PHYSICIAN ASSISTANTTustin, CA 927801770762429
- Carolyn Calma, P.A.-CTustin, CA 927801427250844
- Nicole Farwell, PA-CTustin, CA 927801982726378
- Carlos Franco, P.A.Tustin, CA 927801205044492
- Edgar Garza, PA-CTustin, CA 927801184980674
- Nazema Gosla, PATustin, CA 927801659493674
Common questions
What is Grace Catherine Thomas, PA-C's NPI number?
Grace Catherine Thomas, PA-C's National Provider Identifier (NPI) is 1346005089, issued on Feb 20, 2024. An NPI identifies a provider in billing; it is not a license.
Where is Grace Catherine Thomas, PA-C located?
The NPPES record lists a practice address at 17612 17TH St, Tustin, CA, 92780. Phone: (714) 243-5450. Providers update this record themselves, so call before visiting.
How can I verify Grace Catherine Thomas, PA-C's license?
NPPES lists California license number 63870, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Grace Catherine Thomas, PA-C prescribe under Medicare Part D?
In 2024, Grace Catherine Thomas, PA-C had 335 Medicare Part D claims for 225 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.