SIGRID WILLIAMSON MD
NPI 1891312989
Surgery in West Reading, PA

Q: What is Sigrid Williamson's NPI number?

The NPI number for Sigrid Williamson is 1891312989. It was assigned to this individual provider in the NPPES registry on July 6, 2020.

Q: What is Sigrid Williamson's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Q: When was this NPI record last updated?

The NPPES record for Sigrid Williamson was last updated on August 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 06, 2020PECOS Enrolled

420 S 5TH AVE, WEST READING, PA 19611(484) 628-4908 Get Directions Write a Review

NPPES record last updated: August 6, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 6, 2025, Jul 9, 2025, Jul 6, 2020 (3 updates tracked since 2020).

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About Sigrid Williamson Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SIGRID WILLIAMSON MD (NPI 1891312989) is an individual surgery provider in West Reading, Pennsylvania, licensed in Pennsylvania (MT220886) and active in the NPI registry since July 2020. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1891312989

Entity TypeIndividualFemale

Primary Taxonomy208600000X

Provider Legal NameSIGRID WILLIAMSONCredential: MD

Location Address420 S 5TH AVEWest Reading, PA 19611-2143

Mailing AddressPo Box 13579Reading, PA 19612-3579

Phone(484) 628-4908

Sole ProprietorNo

Enumeration DateJuly 6, 2020

Last NPPES UpdateAugust 6, 20253 updates tracked since enumeration

NPPES CertifiedAugust 6, 2025

✔ NPI 1891312989 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in PA · MT220886

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Also ListedPediatricsTaxonomy 208000000X · License MD490277 (PA)

Also ListedPediatrics · Pediatric GastroenterologyTaxonomy 2080P0206X · License MD490277 (PA)

420 S 5TH AVE, West Reading, PA 19611

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Sigrid Williamson Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Sigrid Williamson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Stc Pediatrics LLC

2.5 mi

Pediatric Cardiology

1220 BROADCASTING RD STE 100
Wyomissing, PA 19610

Reassigned Medicare billing, Pennsylvania enrollment
479 clinicians in this Medicare group

NPI 1194306068 (215) 427-4820

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19611 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$84.88 typical visit price

range $54.64 – $166.87

Typical copayment $21.22 (range $13.66 – $41.71)

Most-billed visit code 99203

Established Patient

$68.36 typical visit price

range $17.33 – $135.84

Typical copayment $17.09 (range $4.33 – $33.96)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

TOLUWANIMI OGBONMIDE

Student in an Organized Health Care Education/Training Program

420 S 5TH AVE
WEST READING, PA 19611

Berks County (484) 628-8000

URVASHI SARKAR

Student in an Organized Health Care Education/Training Program

420 S 5TH AVE
WEST READING, PA 19611

Berks County (484) 628-8000

MADISON HECK

Student in an Organized Health Care Education/Training Program

420 S 5TH AVE
WEST READING, PA 19611

Berks County (484) 628-8000

NEIL HOFFMAN M.D.

Pathology (Forensic Pathology)

420 S 5TH AVE
WEST READING, PA 19611

Berks County (484) 628-8615

MS. LANE ROSCOE PA- C

Physician Assistant

420 S 5TH AVE
WEST READING, PA 19611

Berks County (610) 568-3637

ALICE LEE DO

Surgery

420 S 5TH AVE
WEST READING, PA 19611

Berks County (484) 628-4879

KYLE ROMPALA

Nurse Practitioner (Family)

420 S 5TH AVE
READING, PA 19611

Berks County (267) 280-7615

MATTHEW CRYER

Emergency Medicine

420 S 5TH AVE
WEST READING, PA 19611

Berks County (484) 628-1324

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Sigrid Williamson's NPI number?

The NPI number for Sigrid Williamson is 1891312989. It was assigned to this individual provider in the NPPES registry on July 6, 2020.

Where is Sigrid Williamson located?

Sigrid Williamson practices at 420 S 5th Ave, West Reading, PA 19611. The listed phone number is (484) 628-4908.

What is Sigrid Williamson's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Sigrid Williamson enrolled in Medicare?

Yes. Sigrid Williamson is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Sigrid Williamson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sigrid Williamson reassigns Medicare benefits to Stc Pediatrics LLC (Wyomissing, PA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Sigrid Williamson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Sigrid Williamson was last updated on August 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.