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

Dr. Antonio Diaz, MD

Mammography Clinic/Center in San Juan, PR · enumerated 2006.

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

National Provider Identifier

1962433326

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Antonio Diaz

Credential MD

Sex Male

Practice address San Juan, PR, 00926

Phone (787) 720-7954

Enumeration date Jul 5, 2006

Last updated in NPPES Jun 20, 2013

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

Taxonomy & licenses

261QR0206X Mammography Clinic/Center Ambulatory Health Care Facilities · License 12064 (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

What specialty is Antonio Diaz?

Antonio Diaz is registered in NPPES with the primary taxonomy of Mammography Clinic/Center. 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 2026-07-13. Provider record last updated 2013-06-20.