Quick answers
- Does Ricardo J. Sein Najera accept Medicare assignment?
- Yes. Medicare's clinician data says Ricardo J. Sein Najera 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 Ricardo J. Sein Najera see?
- In 2024, CMS data shows 173 Original Medicare patients and 1,069 services for Ricardo J. Sein Najera. This counts Original Medicare only and measures volume, not quality.
- What is Ricardo J. Sein Najera's NPI number?
- 1376744615. 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 Ricardo J. Sein Najera, 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 | 173 |
|---|---|
| Services billed to Medicare | 1,069 |
| Different services or procedures | 45 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Technetium tc-99m sestamibi, diagnostic, per study dose (A9500)95 services
- Nuclear medicine studies of heart muscle at rest and with stress and spect (78452)45 services
- Technetium tc-99m medronate, diagnostic, per study dose, up to 30 millicuries (A9503)27 services
- Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision and review by physician (93015)24 services
- Nuclear medicine study, spect imaging, 1 area or single acquisition, single day imaging (78803)20 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%
- Diabetes61%
- Arthritis44%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)37%
- Chronic kidney disease31%
Hospitals where Ricardo J. Sein Najera works
Medicare's Facility Affiliation Data lists Ricardo J. Sein Najera 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 Centro Comprensivo del CancerSan Juan, PR · Acute Care Hospital · Emergency services: listed by Medicare · CCN 400135
Practice locations
Addresses where Ricardo J. Sein Najera is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 126 Ave De Diego, Suite 5 Sein Medical PlazaSan Juan, PR 00936 (787) 622‑7333
- 1815 Carr, Suite 2Bayamon, PR 00959 (787) 780‑9069
- Ave Paseo De Los Gigantes Valle Arrib, Ba25Carolina, PR 00983 (787) 762‑3850
- Ct Radiology Building 1815 Rd, Suite 2Bayamon, PR 00959 (787) 780‑2121
- Paseo De Los Gigantes, Ba25Carolina, PR 00983
Group practices
Medicare enrollment lists Ricardo J. Sein Najera as a member of these groups (CMS data updated October 2, 2026).
- Centro de Cancer de la Universidad27 clinicians in the group
- Ct Radiology Complex LLC13 clinicians in the group
- Ct Radiology Complex LLC13 clinicians in the group
- Monserrate Imaging Center PSC2 clinicians in the group
Specialties
- Nuclear Medicineprimary
Other nuclear medicine doctors in San Juan
Clinicians with the same Medicare primary specialty in San Juan, PR — not a recommendation.
Other clinicians in Centro de Cancer de la Universidad
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2003 (23 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1376744615 |
| 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