Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ethan Frederick Keller, MD

Q: What is the NPI number for Ethan Keller?

The National Provider Identifier (NPI) for Ethan Keller is 1093403420, a Type 1 (individual) record in the CMS NPPES registry.

Internal Medicine Physician in Milford, DE · enumerated 2023 · practices at Bayhealth Medical Center, Inc.

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

National Provider Identifier

1093403420

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Registry record

Entity type Individual (Type 1)

Name Ethan Frederick Keller

Credential MD

Sex Male

Practice address 804 N Dupont Blvd, Milford, DE, 19963

Phone (302) 725-3557

Enumeration date Apr 25, 2023

Last updated in NPPES May 18, 2023

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License C7-0018190 (DE) 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

What is the NPI number for Ethan Keller?

The National Provider Identifier (NPI) for Ethan Keller is 1093403420, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ethan Keller practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-18.