Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Luis M Mercado, MD

Internal Medicine Physician in San German, PR · enumerated 2005 · practices at Medicina Interna Lmg, Csp.

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

National Provider Identifier

1144227869

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Registry record

Entity type Individual (Type 1)

Name Dr. Luis M Mercado

Credential MD

Sex Male

Practice address Ave. Interamericana #153, Esq Chilin Quinones Edif San Jose #3, San German, PR, 00683

Phone (787) 892-4357

Fax (787) 659-7120

Enumeration date Jul 7, 2005

Last updated in NPPES Apr 24, 2026

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 11063 (PR) 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
660564140	Other	PR	COSVI
212828	Other	PR	UTI
11063	Other	PR	LICENCIA
6830010	Other	PR	HUMANA
7071	Other	PR	INTERNATIONAL MEDICAL CAR
PE4493	Other	PR	PAN AMERICAN LIFE
83684	Other	PR	TRILES
064911	Other	PR	CRUZ AZUL
100003W	Other	PR	MEDICARE Y MUCHO MAS
DM106658	Other	PR	ASSMCA
1066A	Other	PR	PREFERED MEDICARE CHOICE

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 Luis Mercado?

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

Other providers at this practice address

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Medicina Interna Lmg, Csp Specialist · San German, PR NPI 1073816575

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-24.