Quick answers
- Does Ralph F. Mangusan accept Medicare assignment?
- Yes. Medicare's clinician data says Ralph F. Mangusan 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.
- What is Ralph F. Mangusan's NPI number?
- 1497125439. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ralph F. Mangusan works
Medicare's Facility Affiliation Data lists Ralph F. Mangusan 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.
- Holy Cross HospitalSilver Spring, MD · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: not listed by Medicare · CCN 210004
- MedStar Georgetown University HospitalWashington, DC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 090004
Practice locations
Addresses where Ralph F. Mangusan is enrolled with Medicare (CMS data updated October 2, 2026).
- 12800 Middlebrook Rd, Suite 430Germantown, MD 20874 (240) 618‑0275
- 3800 Reservoir Rd NWWashington, DC 20007 (202) 444‑2000
- 6000 Executive Blvd, Suite 501Rockville, MD 20852 (240) 618‑0275
Group practices
Medicare enrollment lists Ralph F. Mangusan as a member of these groups (CMS data updated October 2, 2026).
- MedStar Medical Group II LLC3,767 clinicians in the group
- Potomac Oncology and Hematology, LLC3 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Germantown
Clinicians with the same Medicare primary specialty in Germantown, MD — not a recommendation.
Other clinicians in MedStar Medical Group II LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1497125439 |
| 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
- 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