Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nicholas P Marsico, M.D.

Specialist in Los Angeles, CA · enumerated 2006.

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

National Provider Identifier

1992876155

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Registry record

Entity type Individual (Type 1)

Name Nicholas P Marsico

Credential M.D.

Sex Male

Practice address 420 E 3rd St, Suite 603, Los Angeles, CA, 90013

Phone (213) 680-1551

Fax (213) 680-2148

Enumeration date Nov 10, 2006

Last updated in NPPES Dec 14, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers · License A86442 (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
GR0078580	Medicaid	CA	-
GR0078583	Medicaid	CA	-
GR0078582	Medicaid	CA	-
00A864420	Medicaid	CA	-
1710057245	Other	CA	GROUP NPI
GR0078581	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.

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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 Nicholas Marsico?

Nicholas Marsico 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-14.