Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Robert A. Mecum, M.D., Inc.

Gastroenterology Physician in San Marino, CA · enumerated 2012 · authorized official Robert Mecum, President.

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

National Provider Identifier

1659628758

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Registry record

Entity type Organization (Type 2)

Legal business name Robert A. Mecum, M.D., Inc.

Practice address 1605 Euston Rd, San Marino, CA, 91108

Phone (562) 789-5577

Fax (562) 789-5567

Enumeration date Aug 7, 2012

Last updated in NPPES Apr 22, 2013

Taxonomy & classification

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License G78258 (CA) Primary

Authorized official

Name Robert Mecum

Title President

Phone (562) 789-5577

Other identifiers

Identifier	Type	State	Issuer
00G782580	Medicaid	CA	-

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 is Robert A. Mecum, M.D., Inc. located?

The practice location on file with NPPES is in San Marino, CA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2013-04-22. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-04-22.