Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Catherine Clarke, MD

Geriatric Medicine (Internal Medicine) Physician in Wynnewood, PA · enumerated 2006.

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

National Provider Identifier

1821036682

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Registry record

Entity type Individual (Type 1)

Name Dr. Catherine Clarke

Credential MD

Sex Female

Practice address 300 E. Lancaster Avenue, Suite 100, Wynnewood, PA, 19096

Phone (610) 649-3456

Fax (610) 642-1740

Enumeration date Jun 3, 2006

Last updated in NPPES Jan 16, 2018

Taxonomy & licenses

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License MD032199E (PA) Primary

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

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

How do I verify Catherine Clarke's NPI record?

Cross-check NPI 1821036682 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1821036682 active?

Yes, as of the latest NPPES snapshot, NPI 1821036682 is active (record last updated 2018-01-16).

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Karen Gardner Internal Medicine Physician · Wynnewood, PA NPI 1205888021

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-01-16.