Quick answers
- Does Ernesto Ayala-Cruz accept Medicare assignment?
- Yes. Medicare's clinician data says Ernesto Ayala-Cruz 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 Ernesto Ayala-Cruz see?
- In 2024, CMS data shows 33 Original Medicare patients and 126 services for Ernesto Ayala-Cruz. This counts Original Medicare only and measures volume, not quality.
- What is Ernesto Ayala-Cruz's NPI number?
- 1134352941. 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 Ernesto Ayala-Cruz, 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 | 33 |
|---|---|
| Services billed to Medicare | 126 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 81 |
Most frequent services
- X-ray of chest, 1 view (71045)71 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 cholesterol58%
- Diabetes52%
- Stroke or mini-stroke42%
- Arthritis39%
- Heart failure36%
Hospitals where Ernesto Ayala-Cruz works
Medicare's Facility Affiliation Data lists Ernesto Ayala-Cruz 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 Universitario de AdultosRio Piedras, PR · Acute Care Hospital · Emergency services: listed by Medicare · CCN 400061
Practice locations
Addresses where Ernesto Ayala-Cruz is enrolled with Medicare (CMS data updated October 2, 2026).
- Asem, Bo. Monacillos Centro Medico De Puerto RicRio Piedras, PR 00935 (787) 777‑3535
Group practices
Medicare enrollment lists Ernesto Ayala-Cruz as a member of this group (CMS data updated October 2, 2026).
- Recinto de Ciencias Medicas247 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Rio Piedras
Clinicians with the same Medicare primary specialty in Rio Piedras, PR — not a recommendation.
Other clinicians in Recinto de Ciencias Medicas
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 | 2004 (22 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134352941 |
| 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
- 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