Quick answers
- Does Roberto Oliveras Marquez accept Medicare assignment?
- Yes. Medicare's clinician data says Roberto Oliveras Marquez 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 Roberto Oliveras Marquez see?
- In 2024, CMS data shows 17 Original Medicare patients and 83 services for Roberto Oliveras Marquez. This counts Original Medicare only and measures volume, not quality.
- What is Roberto Oliveras Marquez's NPI number?
- 1134189582. 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 Roberto Oliveras Marquez, 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 | 17 |
|---|---|
| Services billed to Medicare | 83 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina (76830)14 services
- Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)11 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%
- Diabetes71%
- Arthritis65%
Practice locations
Addresses where Roberto Oliveras Marquez is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Ave Casa LindaBayamon, PR 00959 (787) 789‑1996
- Clinicas Las Americas, 400 Ave Roosevelt Suite 304San Juan, PR 00918 (787) 753‑7406
Group practices
Medicare enrollment lists Roberto Oliveras Marquez as a member of these groups (CMS data updated October 2, 2026).
- Clinica Las Americas Guaynabo, Inc51 clinicians in the group
- The Ob/Gyn Professionals Group PSC3 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Bayamon
Clinicians with the same Medicare primary specialty in Bayamon, PR — not a recommendation.
Other clinicians in Clinica Las Americas Guaynabo, Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Maryland School Of Medicine |
| Graduation year | 1992 (34 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134189582 |
| 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