Quick answers
- Does Gil J. Nieves accept Medicare assignment?
- Yes. Medicare's clinician data says Gil J. 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 Gil J. Nieves see?
- In 2024, CMS data shows 124 Original Medicare patients and 544 services for Gil J. Nieves. This counts Original Medicare only and measures volume, not quality.
- What is Gil J. Nieves's NPI number?
- 1477754000. 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 Gil J. 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 | 124 |
|---|---|
| Services billed to Medicare | 544 |
| Different services or procedures | 30 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)181 services
- Electronic assessment of bladder emptying (51741)39 services
- Complete ultrasound scan of pelvis (76856)36 services
- Complete ultrasound scan behind abdominal cavity (76770)34 services
- Ultrasound scan of pelvic region through rectum (76872)27 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%
- Diabetes69%
- Arthritis38%
- Chronic kidney disease37%
- Ischemic heart disease33%
Hospitals where Gil J. Nieves works
Medicare's Facility Affiliation Data lists Gil J. Nieves 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.
- Auxilio Mutuo HospitalSan Juan, PR · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 400016
Practice locations
Addresses where Gil J. Nieves is enrolled with Medicare (CMS data updated October 2, 2026).
- 940 Los Romero St, Suite 1540San Juan, PR 00926 (787) 513‑8466
- Urb Las, 8 Carr 21San Juan, PR 00921 (787) 763‑7272
Group practices
Medicare enrollment lists Gil J. Nieves as a member of these groups (CMS data updated October 2, 2026).
- Urology Hub LLC5 clinicians in the group
- Puerto Rico Metropolitan Urology LLC2 clinicians in the group
Specialties
- Urologyprimary
Other urologists in San Juan
Clinicians with the same Medicare primary specialty in San Juan, PR — not a recommendation.
Other clinicians in Urology Hub LLC
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 | 2003 (23 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1477754000 |
| 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