Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jeffery L. Twiss, MD

Pediatric Pathology Physician in Wilmington, DE · enumerated 2006.

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

National Provider Identifier

1457416315

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Registry record

Entity type Individual (Type 1)

Name Dr. Jeffery L. Twiss

Credential MD

Sex Male

Practice address A.I. Dupont Hospital for Children, 1600 Rockland Road, Wilmington, DE, 19803

Phone (302) 651-4000

Fax (302) 651-4945

Enumeration date Dec 22, 2006

Last updated in NPPES May 20, 2008

Taxonomy & licenses

207ZP0213X Pediatric Pathology Physician Allopathic & Osteopathic Physicians · License C10006844 (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
4108272	Medicaid	MD	-
101834449	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.

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Frequently asked questions

Where does Jeffery Twiss 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 Jeffery Twiss?

The National Provider Identifier (NPI) for Jeffery Twiss is 1457416315, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-20.