NPPES file of Aug 9, 2026

Sigrid Williamson, MD

Surgery Physician · West Reading, PA

Sigrid Williamson, MD is a surgery physician with a practice address in West Reading, Pennsylvania, and NPI 1891312989, issued on Jul 6, 2020. Check the license (Pennsylvania MT220886, as entered in NPPES) on the Pennsylvania Department of State (PALS); the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1891312989
Name
Sigrid Williamson
Credential
MD
Primary taxonomy
Surgery Physician 208600000X
License numbers
MT220886 PA
MD490277 PA
Self-reported in NPPES; status is on the state search
Practice location
420 S 5TH Ave, West Reading, PA 19611
Phone
(484) 628-4908
Enumerated
Jul 6, 2020
Record last updated
Aug 6, 2025
Medicare enrollment
Enrolled (PECOS I20250719000366); may accept Medicare assignment
Medical or professional school
Jefferson Medical College Of Thomas Jefferson University, 2020
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 surgery physician records → All 1,867 in Pennsylvania → Look up another NPI →

Also registered at 420 S 5TH Ave

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

  1. Nashwa Abdelhakim, MDInternal Medicine Physician1609625029
  2. Bahredin AbdellaStudent in an Organized Health Care Education/Training Program1750084984
  3. Mohammad Abu-TinehInternal Medicine Physician1740968791
  4. Ayushma AcharyaInternal Medicine Physician1114604774
  5. Fernando AcunaEmergency Medicine Physician1730811308
  6. Paul Adeyemi, DPMFoot & Ankle Surgery Podiatrist1295621795

Verify Sigrid Williamson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
    Search for license MT220886    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
Open the Pennsylvania 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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Sigrid Williamson among 1,867 surgery physician records in Pennsylvania

Sigrid Williamson, MD is one of 1,867 surgery physician records with a practice address in Pennsylvania. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2020, is newer than 80% of them.

  • NPI issued2020 · 80% of these records are older, 17% newer
  • In a Medicare fileNo · 72% of these records are
  • In the CMS Doctors and Clinicians fileYes · 50% of these records are
  • Graduated2020 · median 2007 among the 932 with a school on file
  • Record last updated2025 · 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 208600000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

29 surgery physician records list a practice address in West Reading

They are 29 of the 1,123 NPPES records with a practice address in West Reading, and 1,867 surgery physician records in Pennsylvania. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,867 in Pennsylvania → Every provider in West Reading → Surgery Physician nationwide →

The 8 surgery physician records with the nearest ZIP codes

  1. Peter Bamberger, M.D.West Reading, PA 196111588610877
  2. Kate Brod, DOWest Reading, PA 196111639796717
  3. Michael Brown, M.D.West Reading, PA 196111790700227
  4. Abigail Coots, M.D.West Reading, PA 196111548414345
  5. Robert Emery, MDWest Reading, PA 196111225524879
  6. John Gigioli, M.D.West Reading, PA 196111598146441
  7. Robert Howard, D.O.Wyomissing, PA 196111609895010
  8. Eric Jaxheimer, M.D.West Reading, PA 196111508899154

Common questions

What is Sigrid Williamson, MD's NPI number?

Sigrid Williamson, MD's National Provider Identifier (NPI) is 1891312989, issued on Jul 6, 2020. An NPI identifies a provider in billing; it is not a license.

Where is Sigrid Williamson, MD located?

The NPPES record lists a practice address at 420 S 5TH Ave, West Reading, PA, 19611. Phone: (484) 628-4908. Providers update this record themselves, so call before visiting.

How can I verify Sigrid Williamson, MD's license?

NPPES lists Pennsylvania license number MT220886, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.