Sigrid Williamson, MD
NPI 1891312989 · Surgery Physician · West Reading, PA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sigrid Williamson, MD is a Surgery Physician provider in West Reading, PA (NPI 1891312989).
Provider details
- NPI number
- 1891312989
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD490277 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-07-06
- Last updated
- 2025-08-06
- Certified
- 2025-08-06
Frequently asked questions
- What is Sigrid Williamson's NPI number?
- Sigrid Williamson's National Provider Identifier (NPI) is 1891312989, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sigrid Williamson's specialty?
- Sigrid Williamson is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Sigrid Williamson located?
- Sigrid Williamson's practice location on file with NPPES is 420 S 5th Ave, West Reading, PA 19611-2143.
- What is Sigrid Williamson's phone number?
- The practice phone number listed in the NPPES registry for Sigrid Williamson is (484) 628-4908.
- Does Sigrid Williamson accept Medicare?
- Sigrid Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sigrid Williamson's NPI active?
- Yes — Sigrid Williamson's NPI (1891312989) is active in the NPPES registry as of the last update on 2025-08-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.