Tammy Darby, PA-C
Physician Assistant · Pomona, CA
Tammy Darby, PA-C is a physician assistant with a practice address in Pomona, California, and NPI 1265828370, issued on Apr 15, 2015. Check the license (California 52376, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Tammy Darby
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 52376 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2740 N Garey Ave Ste 100, Pomona, CA 91767
- Phone
- (909) 623-2300
- Enumerated
- Apr 15, 2015
- Record last updated
- Nov 9, 2022
- Fax
- (909) 469-2472
- Medicare enrollment
- Enrolled (PECOS I20231010004092); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 2740 N Garey Ave Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amit Paliwal, MD MBA MPHFamily Medicine Physician1790881159
- Yogesh Paliwal, MDCardiovascular Disease Physician1346217551
Verify Tammy Darby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 52376Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average physician assistant in 2024
345 Medicare Part D claims for 87 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Atorvastatin Calcium46 claims
- Amlodipine Besylate26 claims
- Alendronate Sodium20 claims
- Metformin Hcl19 claims
- Losartan Potassium16 claims
- Simvastatin13 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: $38.59
2 payments; by number, the most common kind was food and beverage; the largest payer was Cranial Technologies, 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.
Bills Medicare through one group practice
- Inland Behavioral And Health Services IncSan Bernadino, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tammy Darby among 14,451 physician assistant records in California
Tammy Darby, 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 2015, is newer than 41% of them.
- NPI issued2015 · 41% of these records are older, 56% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2014 · median 2018 among the 7,214 with a school on file
- 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).
186 physician assistant records list a practice address in Pomona
They are 186 of the 5,102 NPPES records with a practice address in Pomona, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Pomona → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Jaison Fraizer, PA-CPomona, CA 917671073551263
- Peta-Gay Gihbsson, P.A.-CPomona, CA 917671295988095
- Yoodiy Gonzales, PAPomona, CA 917671942366281
- Jehan Goubran, PACPomona, CA 917671942413356
- Manuela Hess, PA-CPomona, CA 917671508019167
- Catherine Letherer, PA-CPomona, CA 917671265476485
- Joel LopezPomona, CA 917671659526911
- Erin Merchant, P.A.-C.Pomona, CA 917671619089117
Common questions
What is Tammy Darby, PA-C's NPI number?
Tammy Darby, PA-C's National Provider Identifier (NPI) is 1265828370, issued on Apr 15, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Tammy Darby, PA-C located?
The NPPES record lists a practice address at 2740 N Garey Ave Ste 100, Pomona, CA, 91767. Phone: (909) 623-2300. Providers update this record themselves, so call before visiting.
How can I verify Tammy Darby, PA-C's license?
NPPES lists California license number 52376, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Tammy Darby, PA-C prescribe under Medicare Part D?
In 2024, Tammy Darby, PA-C had 345 Medicare Part D claims for 87 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.