Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

William K. Sherwin MD Phd

Dermatology Physician in Bala Cynwyd, PA · enumerated 2006 · authorized official Mary Griffin, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1629010236

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Registry record

Entity type Organization (Type 2)

Legal business name William K. Sherwin MD Phd

Other name <Unavail>

Practice address 1 Bala Plaza, Suite 620, Bala Cynwyd, PA, 19004

Phone (610) 664-3300

Fax (610) 664-1151

Enumeration date Jun 11, 2006

Last updated in NPPES May 3, 2021

Taxonomy & classification

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License MD018002E (PA) Primary

207ND0900X Dermatopathology Physician Allopathic & Osteopathic Physicians · License MD018002E (PA) Secondary

207NI0002X Clinical & Laboratory Dermatological Immunology Physician Allopathic & Osteopathic Physicians · License MD018002E (PA) Secondary

207NP0225X Pediatric Dermatology Physician Allopathic & Osteopathic Physicians · License MD018002E (PA) Secondary

207NS0135X Procedural Dermatology Physician Allopathic & Osteopathic Physicians · License MD018002E (PA) Secondary

208200000X Plastic Surgery Physician Allopathic & Osteopathic Physicians · License MD018002E (PA) Secondary

Authorized official

Name Mary Griffin

Title President

Phone (610) 664-3300

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where is William K. Sherwin MD Phd located?

The practice location on file with NPPES is in Bala Cynwyd, PA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2021-05-03. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-05-03.