Quick answers
- Does John F. Fahy accept Medicare assignment?
- Yes. Medicare's clinician data says John F. Fahy 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 John F. Fahy's NPI number?
- 1225597321. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John F. Fahy works
Medicare's Facility Affiliation Data lists John F. Fahy 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.
- Tri-City Medical CenterOceanside, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050128
Practice locations
Addresses where John F. Fahy is enrolled with Medicare (CMS data updated October 2, 2026).
- 4002 Vista WayOceanside, CA 92056 (760) 724‑8411
Group practices
Medicare enrollment lists John F. Fahy as a member of these groups (CMS data updated October 2, 2026).
- Darin Rentz DO PC124 clinicians in the group
- Sound Physicians Anesthesiology of California PC35 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Oceanside
Clinicians with the same Medicare primary specialty in Oceanside, CA — not a recommendation.
Other clinicians in Darin Rentz DO PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Uniformed Services Uhs Fe Hebert School Of Med |
| Graduation year | 2019 (7 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1225597321 |
| 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