Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Cathryn Mcwilliams, MD

Pediatrics Physician in Phoenixville, PA · enumerated 2006.

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

National Provider Identifier

1932113453

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Registry record

Entity type Individual (Type 1)

Name Cathryn Mcwilliams

Credential MD

Sex Female

Practice address 824 Main St, Suite 100a, Phoenixville, PA, 19460

Phone (610) 935-1330

Enumeration date Jul 28, 2006

Last updated in NPPES Mar 15, 2011

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD058315L (PA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
0018495830001	Medicaid	PA	-

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 does Cathryn Mcwilliams practice?

The practice location on file with NPPES is in Phoenixville, PA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Cathryn Mcwilliams?

The National Provider Identifier (NPI) for Cathryn Mcwilliams is 1932113453, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Robert Glenn Family Medicine Physician · Phoenixville, PA NPI 1831191303 Carl Sharer Internal Medicine Physician · Phoenixville, PA NPI 1730171448 Christopher Holroyde Hematology & Oncology Physician · Phoenixville, PA NPI 1609868348 Thomas Giovinazzo Physician Assistant · Phoenixville, PA NPI 1316923345 Pennsylvania Medical Professionals PC Hematology & Oncology Physician · Phoenixville, PA NPI 1770553729 Oladoye Kehinde Internal Medicine Physician · Phoenixville, PA NPI 1497727044 Phoenixville Hospital Company, LLC Surgical Oncology Physician · Phoenixville, PA NPI 1962452805 A Frost Colon & Rectal Surgery Physician · Phoenixville, PA NPI 1477592590

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-15.