Quick answers
- Which hospitals does Gregory C. Warner work at?
- Medicare's official clinician data lists Gregory C. Warner at 5 hospitals: Adventist Health Hanford, Community Regional Medical Center, Kaweah Health Medical Center, Saint Agnes Medical Center and Sierra View Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory C. Warner see patients?
- Medicare's clinician data lists 5 practice locations, including Fresno, CA, Hanford, CA and Visalia, CA. Call before your visit to confirm the address.
- What is Gregory C. Warner's specialty?
- Medicare lists Pulmonary Disease as the primary specialty, and also Critical Care (Intensivists), Internal Medicine and Sleep Medicine.
- Does Gregory C. Warner accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory C. Warner 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 C. Warner?
- (559) 450-7200, as listed in official Medicare / NPI Registry data.
- What is Gregory C. Warner's NPI number?
- 1699810689. 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 C. Warner works
Medicare's Facility Affiliation Data lists Gregory C. Warner at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health HanfordHanford, CA · Acute Care Hospital · CCN 050121
- Community Regional Medical CenterFresno, CA · Acute Care Hospital · CCN 050060
- Kaweah Health Medical CenterVisalia, CA · Acute Care Hospital · CCN 050057
- Saint Agnes Medical CenterFresno, CA · Acute Care Hospital · CCN 050093
- Sierra View Medical CenterPorterville, CA · Acute Care Hospital · CCN 050261
Practice locations
Addresses where Gregory C. Warner is enrolled with Medicare (CMS data updated 2026-10-02).
- 1303 E Herndon AveFresno, CA 93720
- 1510 E Herndon Ave, Suite 210Fresno, CA 93720 (559) 450‑7200
- 1524 W Lacey Blvd, Suite 101Hanford, CA 93230 (559) 583‑4695
- 400 W Mineral King AveVisalia, CA 93291 (559) 624‑2000
- 5400 W Hillsdale AveVisalia, CA 93291 (559) 738‑7547
Group practices
Medicare enrollment lists Gregory C. Warner as a member of these groups (CMS data updated 2026-10-02).
- Adventist Health Physicians Network628 clinicians in the group
- Saint Agnes Medical Foundation161 clinicians in the group
Specialties
- Pulmonary Diseaseprimary
- Critical Care (Intensivists)also
- Internal Medicinealso
- Sleep Medicinealso
Other pulmonologists in Fresno
Clinicians with the same Medicare primary specialty in Fresno, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Nebraska College Of Medicine |
| Graduation year | 1980 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1699810689 |
| 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