Brent L. Williamson, M.D.
Internal Medicine Physician · York, PA
Brent L. Williamson, M.D. is an internal medicine physician with a practice address in York, Pennsylvania, and NPI 1457792392, issued on Jul 8, 2013. Check the license (Pennsylvania MD458584, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Brent L. Williamson
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD458584 PA
Self-reported in NPPES; status is on the state search - Practice location
- 1001 S George St, York, PA 17403
- Phone
- (717) 851-4751
- Enumerated
- Jul 8, 2013
- Record last updated
- Jul 20, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (717) 851-2826
- Medicaid ID
- 103144670001 PA
- Medicare enrollment
- Enrolled (PECOS I20180731001237); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 1001 S George St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Saira Aamir, MDInternal Medicine Physician1184515686
- Mohammed Asfar Abdus SamadInternal Medicine Physician1487491353
- Elias Abebe, MDNeonatal-Perinatal Medicine Physician1831358480
- Amanda Achenbach, PACMedical Physician Assistant1972865095
- Basilio Addo, M.DCardiovascular Disease Physician1124515838
- Ayotemi AdewalePsychiatry Physician1801727300
Verify Brent L. Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD458584Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
229 Medicare Part D claims for 139 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 20 claims were for opioids.
Most prescribed
- Cefdinir28 claims
- Ciprofloxacin Hcl13 claims
- Prednisone13 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: $503.98
17 payments; by number, the most common kind was food and beverage; the largest payer was Salix Pharmaceuticals, a division of Bausch Health US, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Mary Washington Healthcare Providers LLCFredericksburg, VA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brent L. Williamson among 7,300 internal medicine physician records in Pennsylvania
Brent L. Williamson, M.D. is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 57% of them.
- NPI issued2013 · 57% of these records are older, 40% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2013 · median 2008 among the 4,208 with a school on file
- Record last updated2017 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
164 internal medicine physician records list a practice address in York
They are 164 of the 4,575 NPPES records with a practice address in York, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in York → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Cyrus Beekey, MDYork, PA 174031972539336
- Todd Butz, MDYork, PA 174031477589026
- Robert Fritz, DOYork, PA 174031003882135
- Benjamin Hoover, M.D.York, PA 174031346272416
- Mark Illfelder, DOYork, PA 174031568438869
- Thomas Kurland, DOYork, PA 174031679549901
- W Leedy, DOYork, PA 174031235105115
- Bonny Lightner, DOYork, PA 174031902872187
Common questions
What is Brent L. Williamson, M.D.'s NPI number?
Brent L. Williamson, M.D.'s National Provider Identifier (NPI) is 1457792392, issued on Jul 8, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Brent L. Williamson, M.D. located?
The NPPES record lists a practice address at 1001 S George St, York, PA, 17403. Phone: (717) 851-4751. Providers update this record themselves, so call before visiting.
How can I verify Brent L. Williamson, M.D.'s license?
NPPES lists Pennsylvania license number MD458584, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Brent L. Williamson, M.D. prescribe under Medicare Part D?
In 2024, Brent L. Williamson, M.D. had 229 Medicare Part D claims for 139 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.