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

Dr. Andres Zimmermann, MD

Geriatric Medicine (Internal Medicine) Physician in Oceanside, CA · enumerated 2005.

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

National Provider Identifier

1114904422

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Registry record

Entity type Individual (Type 1)

Name Dr. Andres Zimmermann

Credential MD

Sex Male

Practice address Oceanside, CA, 92056

Phone (760) 639-1714

Fax (760) 630-1252

Enumeration date Dec 28, 2005

Last updated in NPPES Mar 7, 2023

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

Taxonomy & licenses

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License A71687 (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
A71687	Other	CA	LICENSE
00A716870	Other	CA	PPIN

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 Andres Zimmermann?

Andres Zimmermann is registered in NPPES with the primary taxonomy of Geriatric Medicine (Internal Medicine) 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.

Other providers at this practice address

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Michelle Gonzales Family Medicine Physician · Oceanside, CA NPI 1073539136 Chad Burgess Endodontics · Oceanside, CA NPI 1821173022 Wilson Liu Family Medicine Physician · Oceanside, CA NPI 1528120748 Michelle Gonzales MD PC Family Medicine Physician · Oceanside, CA NPI 1982856290 Rady Children'S Hospital San Diego General Acute Care Hospital · Oceanside, CA NPI 1154613818 Ki Wan Kim Endodontics · Oceanside, CA NPI 1689961120

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.