Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stuart Fischer, M.D.

Cardiovascular Disease Physician in Los Alamitos, CA · enumerated 2006.

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

National Provider Identifier

1083656086

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Registry record

Entity type Individual (Type 1)

Name Dr. Stuart Fischer

Credential M.D.

Sex Male

Practice address 5300 Katella Ave, Los Alamitos, CA, 90720

Phone (562) 430-7533

Fax (562) 430-8055

Enumeration date Jun 12, 2006

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License G47229 (CA) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License G47229 (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
00G472290	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 Stuart Fischer?

Stuart Fischer is registered in NPPES with the primary taxonomy of Cardiovascular Disease 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 2022-07-21.