Darcy Duffin, PA-C
Medical Physician Assistant · San Diego, CA
Darcy Duffin, PA-C is a medical physician assistant with a practice address in San Diego, California, and NPI 1669894713, issued on Jan 8, 2014. Check the license (California PA23134, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Darcy Duffin
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- PA23134 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9339 Genesee Ave Ste P39, San Diego, CA 92121
- Phone
- (858) 545-5755
- Enumerated
- Jan 8, 2014
- Record last updated
- Jan 8, 2014 (not updated in 12 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,376 in California → Look up another NPI →
Also registered at 9339 Genesee Ave Ste P39
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Darcy Duffin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA23134Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average medical physician assistant in 2024
16 Medicare Part D claims, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D.
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.
Darcy Duffin among 3,376 medical physician assistant records in California
Darcy Duffin, PA-C is one of 3,376 medical physician assistant records with a practice address in California. 69% 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 58% of them.
- NPI issued2014 · 58% of these records are older, 38% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2014 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in California
There are 3,376 medical physician assistant records in California.
All 3,376 in California → Every provider in San Diego → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Jill Chang, PA-CSan Diego, CA 921211114112786
- Lindsay Eggen, PA-CSan Diego, CA 921211326393893
- Lauren Fox, PA-CSan Diego, CA 921211841553658
- Ashley Goodacre, PA-CSan Diego, CA 921211477806727
- Jennifer Johnstad, PA-CSan Diego, CA 921211336325620
- Vanessa Lazaro, PA-CSan Diego, CA 921211376766741
- Karla Mataele, PASan Diego, CA 921211275860868
- Holly Mays, PA-CSan Diego, CA 921211104176031
Common questions
What is Darcy Duffin, PA-C's NPI number?
Darcy Duffin, PA-C's National Provider Identifier (NPI) is 1669894713, issued on Jan 8, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Darcy Duffin, PA-C located?
The NPPES record lists a practice address at 9339 Genesee Ave Ste P39, San Diego, CA, 92121. Phone: (858) 545-5755. Providers update this record themselves, so call before visiting.
How can I verify Darcy Duffin, PA-C's license?
NPPES lists California license number PA23134, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Darcy Duffin, PA-C prescribe under Medicare Part D?
In 2024, Darcy Duffin, PA-C had 16 Medicare Part D claims; the average among medical physician assistant prescribers was 1,148. 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.