Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Erin Catherine Thomas, MD

Pediatric Emergency Medicine (Emergency Medicine) Physician in Wilmington, DE · enumerated 2019.

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

National Provider Identifier

1285299107

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Registry record

Entity type Individual (Type 1)

Name Erin Catherine Thomas

Credential MD

Sex Female

Practice address Wilmington, DE, 19803

Phone (302) 651-5874

Fax (302) 651-5954

Enumeration date May 6, 2019

Last updated in NPPES Dec 11, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207PP0204X Pediatric Emergency Medicine (Emergency Medicine) Physician Allopathic & Osteopathic Physicians · License 0101275554 (VA) 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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Erin Thomas?

Erin Thomas is registered in NPPES with the primary taxonomy of Pediatric Emergency Medicine (Emergency Medicine) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-11.