Gwen S. Janczyk, PA
Physician Assistant · La Jolla, CA
Gwen S. Janczyk, PA is a physician assistant with a practice address in La Jolla, California, and NPI 1417022013, issued on Nov 21, 2006. Check the license (California PA15930, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gwen S. Janczyk
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA15930 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9898 Genesee Ave, La Jolla, CA 92037
- Phone
- (858) 824-5353
- Enumerated
- Nov 21, 2006
- Record last updated
- Jan 29, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090316000516); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 9898 Genesee Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Rawaa Almukhtar, M.D., MPHDermatology Physician1003202409
- Eneh-Lieh Ancheta, NPNurse Practitioner1477067981
- Bruce Armstrong, P.A.-C. , MHSPhysician Assistant1003915042
- Anshuman Bansal, M.D.Vascular & Interventional Radiology Physician1366685273
Verify Gwen S. Janczyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA15930Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% more Medicare Part D claims than the average physician assistant in 2024
1,184 Medicare Part D claims for 342 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 35% of claims.
Most prescribed
- Eliquis280 claims
- Sotalol131 claims
- Metoprolol Succinate99 claims
- Flecainide Acetate70 claims
- Diltiazem 24hr Er (Cd)56 claims
- Xarelto55 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: $7,622.38
108 payments; by number, the most common kind was food and beverage; the largest payer was Boston Scientific 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.
Bills Medicare through one group practice
- Scripps HealthOceanside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gwen S. Janczyk among 14,451 physician assistant records in California
Gwen S. Janczyk, PA 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 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 87% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2001 · median 2018 among the 7,214 with a school on file
- Record last updated2020 · 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).
136 physician assistant records list a practice address in La Jolla
They are 136 of the 3,648 NPPES records with a practice address in La Jolla, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in La Jolla → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Heather Bonaguidi, P.A.La Jolla, CA 920371669458691
- Abha Bosworth, PALa Jolla, CA 920371629067053
- Daniel Collins, P.A.La Jolla, CA 920371548247158
- Doris Elias, P.A.La Jolla, CA 920371457338089
- Karen Fetzer, P.A.-C.La Jolla, CA 920371063490761
- Susan Gilroy, P.A.-C.La Jolla, CA 920371992783575
- Madonna Guzman, P.A.-C.La Jolla, CA 920371871571455
- Christy Kerr, P.A.-C.La Jolla, CA 920371184602336
Common questions
What is Gwen S. Janczyk, PA's NPI number?
Gwen S. Janczyk, PA's National Provider Identifier (NPI) is 1417022013, issued on Nov 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gwen S. Janczyk, PA located?
The NPPES record lists a practice address at 9898 Genesee Ave, La Jolla, CA, 92037. Phone: (858) 824-5353. Providers update this record themselves, so call before visiting.
How can I verify Gwen S. Janczyk, PA's license?
NPPES lists California license number PA15930, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Gwen S. Janczyk, PA prescribe under Medicare Part D?
In 2024, Gwen S. Janczyk, PA had 1,184 Medicare Part D claims for 342 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.