Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ramon Gerena Sr., MD

General Practice Physician in Toa Baja, PR · enumerated 2006.

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

National Provider Identifier

1427111053

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Registry record

Entity type Individual (Type 1)

Name Dr. Ramon Gerena Sr.

Credential MD

Sex Male

Practice address Jr4 Clizzie Graham 7th Secc, Urb Levittown, Toa Baja, PR, 00949

Phone (787) 261-0740

Fax (787) 784-4246

Enumeration date Dec 18, 2006

Last updated in NPPES Oct 17, 2012

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 5403 (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

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 Ramon Gerena?

Ramon Gerena 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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-10-17.