Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Luis C Marrero, M.D.

Neonatal-Perinatal Medicine Physician in Paterson, NJ · enumerated 2005.

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

National Provider Identifier

1124021548

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Registry record

Entity type Individual (Type 1)

Name Luis C Marrero

Credential M.D.

Sex Male

Practice address 703 Main St, Paterson, NJ, 07503

Phone (973) 754-2555

Fax (973) 754-2567

Enumeration date May 31, 2005

Last updated in NPPES Aug 9, 2011

Taxonomy & licenses

2080N0001X Neonatal-Perinatal Medicine Physician Allopathic & Osteopathic Physicians · License MA58317 (NJ) 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
6266207	Medicaid	NJ	-

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 Luis Marrero?

Luis Marrero is registered in NPPES with the primary taxonomy of Neonatal-Perinatal Medicine 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 2011-08-09.