Quick answers
- Does Juan O. Rivera accept Medicare assignment?
- Yes. Medicare's clinician data says Juan O. Rivera 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.
- How many Medicare patients does Juan O. Rivera see?
- In 2024, CMS data shows 217 Original Medicare patients and 441 services for Juan O. Rivera. This counts Original Medicare only and measures volume, not quality.
- What is Juan O. Rivera's NPI number?
- 1184859001. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Juan O. Rivera, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 217 |
|---|---|
| Services billed to Medicare | 441 |
| Different services or procedures | 4 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Emergency department visit with low level of medical decision making (99283)264 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)173 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol65%
- Diabetes45%
- Ischemic heart disease35%
- Chronic kidney disease33%
- Heart failure31%
Practice locations
Addresses where Juan O. Rivera is enrolled with Medicare (CMS data updated October 2, 2026).
- Val Harbour Plaza, 101 445 Ave. Gonzalez ClementeMayaguez, PR 00680 (787) 422‑2059
- Val Harbour Plaza Box, 102 445 Ave. Gonzalez ClementeMayaguez, PR 00680
Specialties
- General Practiceprimary
Other general practitioners in Mayaguez
Clinicians with the same Medicare primary specialty in Mayaguez, PR — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2007 (19 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1184859001 |
| 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
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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