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

Michael Frank Mellman, MEDICAL DOCTOR

Internal Medicine Physician in El Segundo, CA · enumerated 2006.

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

National Provider Identifier

1427083450

Verified

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Registry record

Entity type Individual (Type 1)

Name Michael Frank Mellman

Credential MEDICAL DOCTOR

Sex Male

Practice address El Segundo, CA, 90245

Phone (310) 643-7494

Fax (310) 643-7498

Enumeration date Jul 11, 2006

Last updated in NPPES Apr 28, 2021

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G39340 (CA) Primary

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 Michael Mellman?

The National Provider Identifier (NPI) for Michael Mellman is 1427083450, a Type 1 (individual) record in the CMS NPPES registry.

Where does Michael Mellman practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-28.