NPPES file of Aug 9, 2026

Kerri Williamson, PA-C

Physician Assistant · San Francisco, CA

Kerri Williamson, PA-C is a physician assistant with a practice address in San Francisco, California, and NPI 1508332149, issued on Oct 22, 2018. Check the license (California PA58151, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1508332149
Name
Kerri Williamson
Credential
PA-C
Primary taxonomy
Physician Assistant 363A00000X
License numbers
PA58151 CA
C5-0001258 DE
PA9117380 FL
Self-reported in NPPES; status is on the state search
Practice location
333 1St St Ste A, San Francisco, CA 94105
Phone
(302) 386-7767
Enumerated
Oct 22, 2018
Record last updated
May 20, 2025
Medicare enrollment
Enrolled (PECOS I20240607003329); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest physician assistant records → All 14,451 in California → Look up another NPI →

Also registered at 333 1St St Ste A

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Emily Acle, PA-CPhysician Assistant1265986897
  2. Camila AguilarPhysician Assistant1013785211
  3. Nawal Ahmed Khan, MDInternal Medicine Physician1962727818
  4. Rachel Akin, FNPPrimary Care Nurse Practitioner1104205871
  5. Mae Carmela AltavasFamily Nurse Practitioner1508261686
  6. Natalie Araya, P.A.Physician Assistant1578828604

Verify Kerri Williamson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license PA58151    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Circle Medical Care OF CaliforniaSan Francisco, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Kerri Williamson among 14,451 physician assistant records in California

Kerri Williamson, 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 2018, is newer than 52% of them.

  • NPI issued2018 · 52% of these records are older, 44% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileYes · 50% of these records are
  • Graduated2018 · median 2018 among the 7,214 with a school on file
  • Record last updated2025 · 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).

Physician Assistant providers in California

There are 14,451 physician assistant records in California.

All 14,451 in California → Every provider in San Francisco → Physician Assistant nationwide →

The 8 physician assistant records with the nearest ZIP codes

  1. Benjamin Brackett, P.A.-CSan Francisco, CA 941051881872018
  2. Robert Develle, PA-CSan Francisco, CA 941051598709248
  3. Enrique Gonzalez, PA-CSan Francisco, CA 941051548393697
  4. Regina Hudak, PA-CSan Francisco, CA 941051346243185
  5. Larue Laporte, PASan Francisco, CA 941051285782136
  6. Janel Liverato, PA-CSan Francisco, CA 941051770711038
  7. Lartily Mateo, PA-CSan Francisco, CA 941051124250220
  8. Jennifer Nossokoff, PA-CSan Francisco, CA 941051205143591

Common questions

What is Kerri Williamson, PA-C's NPI number?

Kerri Williamson, PA-C's National Provider Identifier (NPI) is 1508332149, issued on Oct 22, 2018. An NPI identifies a provider in billing; it is not a license.

Where is Kerri Williamson, PA-C located?

The NPPES record lists a practice address at 333 1St St Ste A, San Francisco, CA, 94105. Phone: (302) 386-7767. Providers update this record themselves, so call before visiting.

How can I verify Kerri Williamson, PA-C's license?

NPPES lists California license number PA58151, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.