Quick answers
- Does Grisselle M. Robaina Santiago accept Medicare assignment?
- Yes. Medicare's clinician data says Grisselle M. Robaina Santiago 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 Grisselle M. Robaina Santiago's NPI number?
- 1821719857. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Grisselle M. Robaina Santiago works
Medicare's Facility Affiliation Data lists Grisselle M. Robaina Santiago at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Hospital PereaMayaguez, PR · Acute Care Hospital · Emergency services: listed by Medicare · CCN 400123
Practice locations
Addresses where Grisselle M. Robaina Santiago is enrolled with Medicare (CMS data updated October 2, 2026).
- 15 Calle Dr Basora NMayaguez, PR 00680 (787) 342‑6120
Group practices
Medicare enrollment lists Grisselle M. Robaina Santiago as a member of this group (CMS data updated October 2, 2026).
- Physician Healthcare Administration LLC5 clinicians in the group
Specialties
- General Practiceprimary
Other general practitioners in Mayaguez
Clinicians with the same Medicare primary specialty in Mayaguez, PR — not a recommendation.
Other clinicians in Physician Healthcare Administration LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2017 (9 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1821719857 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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