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

Dr. Lewis Gamarra, M.D.

Hospitalist Physician in Emeryville, CA · enumerated 2006.

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

National Provider Identifier

1124048608

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Registry record

Entity type Individual (Type 1)

Name Dr. Lewis Gamarra

Credential M.D.

Sex Male

Practice address Emeryville, CA, 94608

Phone (510) 851-7501

Fax (510) 851-7446

Enumeration date Jul 20, 2006

Last updated in NPPES Jan 11, 2023

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 G70417 (CA) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 70417 (CA) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License G70417 (CA) 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
00G704170	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

What specialty is Lewis Gamarra?

Lewis Gamarra is registered in NPPES with the primary taxonomy of Hospitalist Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-11.