Joseph Greg Williamson, PA
Surgical Physician Assistant · Anderson, IN
Joseph Greg Williamson, PA is a surgical physician assistant with a practice address in Anderson, Indiana, and NPI 1386651933, issued on Aug 2, 2006. Check the license (Indiana 10000604A, as entered in NPPES) with the Indiana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Joseph Greg Williamson
- Credential
- PA
- Primary taxonomy
- Surgical Physician Assistant 363AS0400X
- License number
- 10000604A IN
Self-reported in NPPES; status is on the state search - Practice location
- 2610 Enterprise Dr, Anderson, IN 46013
- Phone
- (765) 683-4400
- Enumerated
- Aug 2, 2006
- Record last updated
- Jan 16, 2025
- Fax
- (765) 213-3713
- Medicare enrollment
- Enrolled (PECOS I20100224000931); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest surgical physician assistant records → All 164 in Indiana → Look up another NPI →
Also registered at 2610 Enterprise Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brian Camilleri, DOOrthopaedic Surgery Physician1003111063
- Diana CastlemanAthletic Trainer1033488192
- Li Chen, M.D.Orthopaedic Hand Surgery Physician1992758189
- Courtney Deshong, PTPhysical Therapist1689624546
- Brooke EarlAthletic Trainer1639629785
- David Graybill, MDOrthopaedic Surgery Physician1619983764
Verify Joseph Greg Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Indiana board licenses this profession
Search for license 10000604ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% more Medicare Part D claims than the average surgical physician assistant in 2024
356 Medicare Part D claims for 129 beneficiaries, against an average of 304 among the 10,174 providers of this specialty who prescribed in Part D. 207 claims were for opioids.
Most prescribed
- Oxycodone Hcl64 claims
- Tramadol Hcl60 claims
- Hydrocodone-Acetaminophen58 claims
- Amoxicillin-Clavulanate Potass48 claims
- Cephalexin35 claims
- Methylprednisolone26 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: $109.79
2 payments; by number, the most common kind was food and beverage; the largest payer was Smith+Nephew, Inc. The 7,578 providers of this specialty with any payment received $703.95 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
- Central Indiana Orthopedics LLCAnderson, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Greg Williamson among 164 surgical physician assistant records in Indiana
Joseph Greg Williamson, PA is one of 164 surgical physician assistant records with a practice address in Indiana. 79% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 71% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2002 · median 2014 among the 109 with a school on file
- Record last updated2025 · 34% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AS0400X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Physician Assistant providers in Indiana
There are 164 surgical physician assistant records in Indiana.
All 164 in Indiana → Every provider in Anderson → Surgical Physician Assistant nationwide →
The 8 surgical physician assistant records with the nearest ZIP codes
- Samantha Barnett, PA-CCarmel, IN 460321932579802
- Amy Bender, PA-CCarmel, IN 460321356672752
- Jennifer Bradley, PA-CCarmel, IN 460321427145317
- Pamela Gray, PACarmel, IN 460321558696328
- Paula Haffley, PA-CCarmel, IN 460321336396233
- Kimberly Harvey, P.A.-CCarmel, IN 460321730339482
- Amanda Hobson, PA-CCarmel, IN 460321043527443
- Elizabeth Klein, PACarmel, IN 460321710264734
Common questions
What is Joseph Greg Williamson, PA's NPI number?
Joseph Greg Williamson, PA's National Provider Identifier (NPI) is 1386651933, issued on Aug 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Greg Williamson, PA located?
The NPPES record lists a practice address at 2610 Enterprise Dr, Anderson, IN, 46013. Phone: (765) 683-4400. Providers update this record themselves, so call before visiting.
How can I verify Joseph Greg Williamson, PA's license?
NPPES lists Indiana license number 10000604A, as entered by the provider. Search the Indiana board that licenses this profession; the NPPES record confirms identity only.
How much does Joseph Greg Williamson, PA prescribe under Medicare Part D?
In 2024, Joseph Greg Williamson, PA had 356 Medicare Part D claims for 129 beneficiaries; the average among surgical physician assistant prescribers was 304. 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.