Quick answers
- Does Graciela D. Rivera Castro accept Medicare assignment?
- Yes. Medicare's clinician data says Graciela D. Rivera Castro accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Graciela D. Rivera Castro's NPI number?
- 1033666813. 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 Graciela D. Rivera Castro is enrolled with Medicare (CMS data updated October 2, 2026).
- 29 Washington St Ashford Medical, Suite 206San Juan, PR 00907 (787) 722‑1104
Group practices
Medicare enrollment lists Graciela D. Rivera Castro as a member of this group (CMS data updated October 2, 2026).
- Castaner and Pou LLC3 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in San Juan
Clinicians with the same Medicare primary specialty in San Juan, PR — not a recommendation.
Other clinicians in Castaner and Pou LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Puerto Rico School Of Medicine |
| Graduation year | 2018 (8 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1033666813 |
| 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 October 2, 2026, retrieved October 29, 2026
- 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