NPI Portal NPI Lookup & Verification

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

Dr. Vivian B. Diaz Melendez, M.D

Hematology & Oncology Physician in Humacao, PR · enumerated 2007 · practices at Centro Medico Del Turabo Inc..

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

National Provider Identifier

1265633135

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Vivian B. Diaz Melendez
Credential M.D
Sex Female
Practice address Humacao, PR, 00791
Phone (787) 960-3314
Enumeration date May 30, 2007
Last updated in NPPES Aug 15, 2011

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

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 16706 (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 Vivian Diaz Melendez practice?
The practice location on file with NPPES is in Humacao, PR. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Vivian Diaz Melendez?
The National Provider Identifier (NPI) for Vivian Diaz Melendez is 1265633135, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-08-15.