Quick answers
- Does John Paul Gerard N. Rosales accept Medicare assignment?
- Yes. Medicare's clinician data says John Paul Gerard N. Rosales 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 John Paul Gerard N. Rosales see?
- In 2024, CMS data shows 422 Original Medicare patients and 3,159 services for John Paul Gerard N. Rosales. This counts Original Medicare only and measures volume, not quality.
- What is John Paul Gerard N. Rosales's NPI number?
- 1508098112. 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 John Paul Gerard N. Rosales, 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 | 422 |
|---|---|
| Services billed to Medicare | 3,159 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 66 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)1,159 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)854 services
- Dialysis services, 4 or more physician visits per month (20 years or older) (90960)256 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)228 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)187 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%
- Diabetes75%
- Chronic kidney disease75%
- Heart failure62%
- Ischemic heart disease54%
Hospitals where John Paul Gerard N. Rosales works
Medicare's Facility Affiliation Data lists John Paul Gerard N. Rosales 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.
- Guam Memorial Hospital AuthorityTamuning, GU · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 650001
- Guam Regional Medical CityDededo, GU · Acute Care Hospital · Emergency services: listed by Medicare · CCN 650003
Practice locations
Addresses where John Paul Gerard N. Rosales is enrolled with Medicare (CMS data updated October 2, 2026).
- 736 Route 4, Suite 103Sinajana, GU 96910
Group practices
Medicare enrollment lists John Paul Gerard N. Rosales as a member of this group (CMS data updated October 2, 2026).
- Pacific Med and Nephrology15 clinicians in the group
Specialties
- Nephrologyprimary
- Internal Medicinealso
Other nephrologists in Sinajana
Clinicians with the same Medicare primary specialty in Sinajana, GU — not a recommendation.
Other clinicians in Pacific Med and Nephrology
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2005 (21 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508098112 |
| 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