Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Nelson Vallejo, M.D.

Internal Medicine Physician in Las Piedras, PR · enumerated 2006.

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

National Provider Identifier

1306812243

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Registry record

Entity type Individual (Type 1)

Name Dr. Nelson Vallejo

Credential M.D.

Sex Male

Practice address Ave Jose C Barbosa, # 225, Las Piedras, PR, 00771

Phone (787) 733-3508

Fax (787) 733-0925

Enumeration date Feb 28, 2006

Last updated in NPPES Feb 26, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 10500 (PR) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

Where does Nelson Vallejo practice?

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

What is the NPI number for Nelson Vallejo?

The National Provider Identifier (NPI) for Nelson Vallejo is 1306812243, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-26.