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

Rick Rieser, M.D

Nuclear Medicine Physician in Los Angeles, CA · enumerated 2016.

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

National Provider Identifier

1740735737

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Registry record

Entity type Individual (Type 1)

Name Rick Rieser

Credential M.D

Sex Male

Practice address Los Angeles, CA, 90057

Phone (213) 263-2468

Enumeration date Aug 18, 2016

Last updated in NPPES Aug 18, 2016

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

Taxonomy & licenses

207U00000X Nuclear Medicine Physician Allopathic & Osteopathic Physicians · License 55156 (CA) Primary

207UN0901X Nuclear Cardiology Physician Allopathic & Osteopathic Physicians · License 55156 (CA) Secondary

207UN0902X Nuclear Imaging & Therapy Physician Allopathic & Osteopathic Physicians · License 55156 (CA) Secondary

207UN0903X In Vivo & In Vitro Nuclear Medicine Physician Allopathic & Osteopathic Physicians · License 55156 (CA) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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.

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Frequently asked questions

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.

What specialty is Rick Rieser?

Rick Rieser is registered in NPPES with the primary taxonomy of Nuclear Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-08-18.