Quick answers
- Does Carlos J. Nassar accept Medicare assignment?
- Yes. Medicare's clinician data says Carlos J. Nassar 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 Carlos J. Nassar see?
- In 2024, CMS data shows 264 Original Medicare patients and 558 services for Carlos J. Nassar. This counts Original Medicare only and measures volume, not quality.
- What is Carlos J. Nassar's NPI number?
- 1922002559. 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 Carlos J. Nassar, 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 | 264 |
|---|---|
| Services billed to Medicare | 558 |
| Different services or procedures | 84 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- X-ray of chest, 1 view (71045)105 services
- Ct scan of abdomen and pelvis without contrast (74176)39 services
- Ct scan head or brain without contrast (70450)36 services
- X-ray of chest, 2 views (71046)34 services
- Ct scan of chest without contrast (71250)22 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%
- Diabetes52%
- Arthritis42%
- Chronic kidney disease33%
- Ischemic heart disease23%
Hospitals where Carlos J. Nassar works
Medicare's Facility Affiliation Data lists Carlos J. Nassar 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.
- Ryder Memorial Hospital IncHumacao, PR · Acute Care Hospital · Emergency services: listed by Medicare · CCN 400007
Practice locations
Addresses where Carlos J. Nassar is enrolled with Medicare (CMS data updated October 2, 2026).
- 355 Ave Font MarteloHumacao, PR 00791 (787) 852‑0768
- 63 Calle Cruz Ortiz Stella SHumacao, PR 00791 (787) 852‑0665
- Carr 2 Km 111, Bo MoraIsabela, PR 00662 (787) 830‑7737
- PO Box, Suite 1927Isabela, PR 00662
- Road 474 Km, Suite 2Isabela, PR 00662 (787) 830‑6100
Group practices
Medicare enrollment lists Carlos J. Nassar as a member of these groups (CMS data updated October 2, 2026).
- Dr Jose a Nassar and Asociados6 clinicians in the group
- Policlinica del Atlantico Corp3 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Humacao
Clinicians with the same Medicare primary specialty in Humacao, PR — not a recommendation.
Other clinicians in Dr Jose a Nassar and Asociados
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 | 1994 (32 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1922002559 |
| 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