Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Colleen R. Witherell, MD

General Practice Physician in Wilmington, DE · enumerated 2006.

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

National Provider Identifier

1396836771

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Registry record

Entity type Individual (Type 1)

Name Dr. Colleen R. Witherell

Credential MD

Sex Female

Practice address Nemours Pediatrics Jessup St., 1602 Jessup Street, Wilmington, DE, 19802

Phone (302) 576-5050

Fax (302) 576-5065

Enumeration date Sep 28, 2006

Last updated in NPPES Sep 2, 2011

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License C10006211 (DE) 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
2259901	Medicaid	NY	-
6883036	Medicaid	MD	-
001860698	Medicaid	PA	-
8631506	Medicaid	NJ	-

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 Colleen Witherell practice?

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

What is the NPI number for Colleen Witherell?

The National Provider Identifier (NPI) for Colleen Witherell is 1396836771, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Hal Byck General Practice Physician · Wilmington, DE NPI 1659477131 Laurie Cooke General Practice Physician · Wilmington, DE NPI 1972693612 Gina Amoroso General Practice Physician · Wilmington, DE NPI 1578693958

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-09-02.