Dr. Frank Vieras Alejandro, MD

Dr. Frank Vieras Alejandro is a General Practice Physician provider (General Practice) practicing in Guaynabo, PR, registered in the NPPES registry with NPI 1376736710 since 2007. The credential MD stands for Doctor of Medicine.

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NPI	1376736710
Entity type	Individual (Type 1)
Name	Dr. Frank Vieras Alejandro
Credential	MD
Sex	Male
Practice address	2080 CARR 8177, TORRE DEL LOS FRAILES SUITE 8K, Guaynabo, PR, 00966
Phone	7877209558
Fax	7877209558
Enumeration date	2007-08-20
Last updated in NPPES	2007-08-20

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
207U00000X	Nuclear Medicine Physician	Secondary	5913	PR
208D00000X	General Practice Physician	Primary	5913	PR

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
0087953	Other	PR	MEDICARE
87953	Other	PR	TRIPLE S INC

Copy-ready billing details

Provider: Frank Vieras Alejandro, MD
NPI: 1376736710
Taxonomy: 208D00000X (General Practice Physician)
Address: 2080 CARR 8177, TORRE DEL LOS FRAILES SUITE 8K, Guaynabo, PR, 00966

Verify this record

Cross-check NPI 1376736710 against the authoritative CMS record: view Dr. Frank Vieras Alejandro on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

What specialty is Frank Vieras Alejandro?

Frank Vieras Alejandro is registered in NPPES with the primary taxonomy of General Practice 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.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-08-20.