Quick answers
- Does Andres J. Ortiz Nieves accept Medicare assignment?
- Yes. Medicare's clinician data says Andres J. Ortiz Nieves 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 Andres J. Ortiz Nieves see?
- In 2024, CMS data shows 16 Original Medicare patients and 41 services for Andres J. Ortiz Nieves. This counts Original Medicare only and measures volume, not quality.
- What is Andres J. Ortiz Nieves's NPI number?
- 1831449560. 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 Andres J. Ortiz Nieves, 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 | 16 |
|---|---|
| Services billed to Medicare | 41 |
| Different services or procedures | 6 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)26 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 cholesterol75%
- Diabetes75%
- Chronic kidney disease69%
Practice locations
Addresses where Andres J. Ortiz Nieves is enrolled with Medicare (CMS data updated October 2, 2026).
- Edificio 36 Calle Barbosa, Esquina RosyBayamon, PR 00960 (787) 269‑6590
Group practices
Medicare enrollment lists Andres J. Ortiz Nieves as a member of this group (CMS data updated October 2, 2026).
- Pro Health Clinical Services LLC20 clinicians in the group
Specialties
- Endocrinologyprimary
Other endocrinologists in Bayamon
Clinicians with the same Medicare primary specialty in Bayamon, PR — not a recommendation.
Other clinicians in Pro Health Clinical Services LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Ponce School Of Medicine |
| Graduation year | 2012 (14 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1831449560 |
| 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