Quick answers
- Which hospitals does Gregory Federer work at?
- Medicare's official clinician data lists Gregory Federer at 2 hospitals: Adventist Health Sonora and Sutter Surgical Hospital - North Valley. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory Federer see patients?
- Medicare's clinician data lists 7 practice locations, including Brownsville, CA, Sacramento, CA and Rocklin, CA. Call before your visit to confirm the address.
- What is Gregory Federer's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty, and also Interventional Radiology.
- Does Gregory Federer accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Federer accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Gregory Federer?
- (530) 675-2457, as listed in official Medicare / NPI Registry data.
- What is Gregory Federer's NPI number?
- 1487817706. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory Federer works
Medicare's Facility Affiliation Data lists Gregory Federer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health SonoraSonora, CA · Acute Care Hospital · CCN 050335
- Sutter Surgical Hospital - North ValleyYuba City, CA · Acute Care Hospital · CCN 050766
Practice locations
Addresses where Gregory Federer is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 16911 Willow Glen RdBrownsville, CA 95919 (530) 675‑2457
- 2800 L StSacramento, CA 95816
- 4232 Silver Lupine LnRocklin, CA 95677 (855) 504‑4544
- 440 Plumas BlvdYuba City, CA 95991 (530) 749‑3409
- 444 Plumas BlvdYuba City, CA 95991 (530) 749‑3420
Group practices
Medicare enrollment lists Gregory Federer as a member of these groups (CMS data updated 2026-10-02).
- Sutter Valley Medical Foundation2,500 clinicians in the group
- Jason L Hwang MD Inc53 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
- Interventional Radiologyalso
Other radiologists in Brownsville
Clinicians with the same Medicare primary specialty in Brownsville, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2008 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487817706 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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