Quick answers
- Where does Julio J. Diaz see patients?
- Medicare's clinician data lists 2 practice locations, including Manati, PR and San Juan, PR. Call before your visit to confirm the address.
- What is Julio J. Diaz's specialty?
- Medicare lists Radiation Oncology as the primary specialty.
- Does Julio J. Diaz accept Medicare assignment?
- Yes. Medicare's clinician data says Julio J. Diaz accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Julio J. Diaz?
- (787) 621-0021, as listed in official Medicare / NPI Registry data.
- What is Julio J. Diaz's NPI number?
- 1366459596. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Julio J. Diaz is enrolled with Medicare (CMS data updated 2026-10-02).
- 7 Carr, 2 KmManati, PR 00674 (787) 621‑0021
- Pr 21 Int Pr, 18 Bo. Monacillos UrbanoSan Juan, PR 00927
Group practices
Medicare enrollment lists Julio J. Diaz as a member of these groups (CMS data updated 2026-10-02).
- Centro de Cancer de la Universidad27 clinicians in the group
- Grupo Radioterapia del Norte2 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Puerto Rico
Clinicians with the same Medicare primary specialty in Puerto Rico — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366459596 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians