Erin Cathleen Duffy, PA-C
Physician Assistant · Capitola, CA
Erin Cathleen Duffy, PA-C is a physician assistant with a practice address in Capitola, California, and NPI 1518536119, issued on Jun 18, 2021. Check the license (California PA59654, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Erin Cathleen Duffy
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA59654 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1820 41St Ave Ste C, Capitola, CA 95010
- Phone
- (831) 684-7611
- Enumerated
- Jun 18, 2021
- Record last updated
- Oct 5, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (831) 477-2009
- Medicare enrollment
- Enrolled (PECOS I20211007002338); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 1820 41St Ave Ste C
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Karuna Sharma, MDInternal Medicine Physician1407806375
- Gina Siclari, PA-CPhysician Assistant1871994939
- Tyler Wellman, MDFamily Medicine Physician1083146468
Verify Erin Cathleen Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA59654Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average physician assistant in 2024
694 Medicare Part D claims for 473 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Cephalexin72 claims
- Azithromycin70 claims
- Amoxicillin-Clavulanate Potass59 claims
- Nitrofurantoin Mono-Macro45 claims
- Prednisone36 claims
- Paxlovid35 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.
The MIPS final score for 2023 (Medicare payment program): 96.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $117.56
1 payment: food and beverage; the largest payer was Ucb, 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
- Dignity Health Medical FoundationSanta Cruz, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Erin Cathleen Duffy among 14,451 physician assistant records in California
Erin Cathleen Duffy, 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 2021, is newer than 67% of them.
- NPI issued2021 · 67% of these records are older, 27% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2021 · median 2018 among the 7,214 with a school on file
- Record last updated2021 · 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).
4 physician assistant records list a practice address in Capitola
They are 4 of the 389 NPPES records with a practice address in Capitola, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Capitola → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Ashley Miller, PA-CCapitola, CA 950101750961579
- Gina Siclari, PA-CCapitola, CA 950101871994939
- Karin TanakaCapitola, CA 950101124421532
- Juliana Arenas Velasquez, PA-CCampbell, CA 950081396577391
- Gabrielle Buma, PHYSICIAN ASSISTANTCampbell, CA 950081841799236
- Tiffany Butler, PA-CCampbell, CA 950081801222443
- Helen DinhCampbell, CA 950081255055422
- Nisha Jariwalla, PA-CCampbell, CA 950081205594181
Common questions
What is Erin Cathleen Duffy, PA-C's NPI number?
Erin Cathleen Duffy, PA-C's National Provider Identifier (NPI) is 1518536119, issued on Jun 18, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Erin Cathleen Duffy, PA-C located?
The NPPES record lists a practice address at 1820 41St Ave Ste C, Capitola, CA, 95010. Phone: (831) 684-7611. Providers update this record themselves, so call before visiting.
How can I verify Erin Cathleen Duffy, PA-C's license?
NPPES lists California license number PA59654, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Erin Cathleen Duffy, PA-C prescribe under Medicare Part D?
In 2024, Erin Cathleen Duffy, PA-C had 694 Medicare Part D claims for 473 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Erin Cathleen Duffy, PA-C's MIPS final score?
The 2023 MIPS final score is 96.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.