NPPES file of Aug 9, 2026

Joseph Williamson, PA-C

Physician Assistant · Greer, SC

Joseph Williamson, PA-C is a physician assistant with a practice address in Greer, South Carolina, and NPI 1326849407, issued on Mar 24, 2025. Check the license (South Carolina 5815, as entered in NPPES) with the South Carolina 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
1326849407
Name
Joseph Williamson
Credential
PA-C
Primary taxonomy
Physician Assistant 363A00000X
License number
5815 SC
Self-reported in NPPES; status is on the state search
Practice location
405 Lancaster Ave, Greer, SC 29650
Phone
(864) 977-7000
Enumerated
Mar 24, 2025
Record last updated
Jun 10, 2025
Medicare enrollment
Enrolled (PECOS I20250530002448); 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.
Download card Updates feed

8 nearest physician assistant records → All 2,294 in South Carolina → Look up another NPI →

Also registered at 405 Lancaster Ave

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

  1. Kyrsten BraderPhysician Assistant1053288407
  2. Natalie DearmentPhysician Assistant1376486167
  3. Mary GaillardMedical Physician Assistant1154281863
  4. Isabel Harlow, PA-CPhysician Assistant1053278903
  5. Kimberly Moon, PA-CPhysician Assistant1194892273
  6. Andrew ThumpstonPhysician Assistant1023987799

Verify Joseph Williamson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich South Carolina board licenses this profession
    Search for license 5815    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 South Carolina 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.

Is this page about you? You can ask us to correct, restrict or remove it: how.

2 hospitals and group practices

  1. Self Regional HealthcareGreenwood, SC · Acute Care Hospitals4 of 5 stars
  2. Self Medical GroupGreenwood, SC

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Joseph Williamson among 2,294 physician assistant records in South Carolina

Joseph Williamson, PA-C is one of 2,294 physician assistant records with a practice address in South Carolina. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 91% of them.

  • NPI issued2025 · 91% of these records are older, 3% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 66% of these records are
  • Graduated2024 · median 2019 among the 1,516 with a school on file
  • Record last updated2025 · 31% 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 South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

34 physician assistant records list a practice address in Greer

They are 34 of the 1,131 NPPES records with a practice address in Greer, and 2,294 physician assistant records in South Carolina.

All 2,294 in South Carolina → Every provider in Greer → Physician Assistant nationwide →

The 8 physician assistant records with the nearest ZIP codes

  1. Rodd Casper, PA CGreer, SC 296501760467971
  2. Loren Cragle, PA-CGreer, SC 296501538406491
  3. Andrew Donnan, PACGreer, SC 296501710077946
  4. Jason Flassing, PA-CGreer, SC 296501912145970
  5. Lauren Gore, PA-CGreer, SC 296501184134272
  6. Erin Herendeen, P.A.Greer, SC 296501588991574
  7. Helen McKinney, PA-CGreer, SC 296501295236438
  8. Andrew Miles, P.A.Greer, SC 296501932558996

Common questions

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

Joseph Williamson, PA-C's National Provider Identifier (NPI) is 1326849407, issued on Mar 24, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Joseph Williamson, PA-C located?

The NPPES record lists a practice address at 405 Lancaster Ave, Greer, SC, 29650. Phone: (864) 977-7000. Providers update this record themselves, so call before visiting.

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

NPPES lists South Carolina license number 5815, as entered by the provider. Search the South Carolina 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.