Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Michael Elias Rosenbaum

Specialist in Oakland, CA · enumerated 2007.

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

National Provider Identifier

1639226848

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Registry record

Entity type Individual (Type 1)

Name Mr. Michael Elias Rosenbaum

Sex Male

Practice address 7200 Bancroft Ave, Eastmont Town Center Bldg. B. Suite 133, Oakland, CA, 94605

Phone (510) 553-8500

Fax (510) 553-8550

Enumeration date Jan 3, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers Primary

Other identifiers

Identifier	Type	State	Issuer
1801983960	Other	CA	ICM

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 Michael Rosenbaum?

Michael Rosenbaum is registered in NPPES with the primary taxonomy of Specialist. 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 2007-07-08.