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

Dr. Aida M Lizasoain Santiago, MD

General Practice Physician in Rio Piedras, PR · enumerated 2007.

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

National Provider Identifier

1003955501

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Registry record

Entity type Individual (Type 1)

Name Dr. Aida M Lizasoain Santiago

Credential MD

Sex Female

Practice address Rio Piedras, PR, 00925

Phone (787) 764-8937

Fax (787) 767-4763

Enumeration date Feb 5, 2007

Last updated in NPPES Mar 3, 2011

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

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 12922 (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
500360E	Other	PR	MMM
20136	Other	PR	SSS
03220	Other	PR	AMERICAN HEALTH
0012589	Other	PR	HUMANA
5884	Other	PR	IMC

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

Where does Aida Lizasoain Santiago practice?

The practice location on file with NPPES is in Rio Piedras, PR. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Aida Lizasoain Santiago?

The National Provider Identifier (NPI) for Aida Lizasoain Santiago is 1003955501, a Type 1 (individual) record in the CMS NPPES registry.

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Policlinica Rio Piedras General Practice Physician · San Juan, PR NPI 1841280534 Norma Prats Lozada Nutritionist · Rio Piedras, PR NPI 1942240049 Luis Rojas Psychiatry Physician · Rio Piedras, PR NPI 1922010065 Laboratorio Clinico Rio Piedras I Clinical Medical Laboratory · San Juan, PR NPI 1134235690 Brenda Orta Rodriguez Geriatric Physical Therapist · Rio Piedras, PR NPI 1508034935 On Physical Therapy Inc Geriatric Physical Therapist · Rio Piedras, PR NPI 1386921716 Medic Home Infusions Internal Medicine Physician · Rio Piedras, PR NPI 1104252212

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-03.