Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Amir K. Ghiassi, M.D.

Critical Care Medicine (Internal Medicine) Physician in Orange, CA · enumerated 2006.

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

National Provider Identifier

1518983899

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Registry record

Entity type Individual (Type 1)

Name Amir K. Ghiassi

Credential M.D.

Sex Male

Practice address 1100 W Stewart Dr, Orange, CA, 92868

Phone (714) 633-9111

Enumeration date Jul 13, 2006

Last updated in NPPES Apr 9, 2018

Taxonomy & licenses

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License C52272 (CA) Secondary

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License C52272 (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
P00348140	Other	CA	RAIL ROAD MEDICARE - PROVIDER PTAN
CG5665	Other	CA	RAIL ROAD MEDICARE - GROUP PTAN
1912919804	Medicaid	CA	-
W1514	Other	CA	MEDICARE PTAN - TYPE 2
1912919804	Other	-	NPI - TYPE 2

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 Amir Ghiassi?

Amir Ghiassi is registered in NPPES with the primary taxonomy of Critical Care Medicine (Internal Medicine) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-04-09.