Quick answers
- Which hospitals does Gregory Y. Warner work at?
- Medicare's official clinician data lists Gregory Y. Warner at 2 hospitals: NorthBay Medical Center and Sutter Medical Center, Sacramento. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory Y. Warner see patients?
- Medicare's clinician data lists 3 practice locations, including Vacaville, CA and Fairfield, CA. Call before your visit to confirm the address.
- What is Gregory Y. Warner's specialty?
- Medicare lists Infectious Disease as the primary specialty.
- Does Gregory Y. Warner accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Y. 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.
- Does Gregory Y. Warner offer telehealth?
- Medicare's clinician data says Gregory Y. Warner offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Gregory Y. Warner?
- (707) 624-7979, as listed in official Medicare / NPI Registry data.
- What is Gregory Y. Warner's NPI number?
- 1073704326. 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 Y. Warner works
Medicare's Facility Affiliation Data lists Gregory Y. Warner at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- NorthBay Medical CenterFairfield, CA · Acute Care Hospital · CCN 050367
- Sutter Medical Center, SacramentoSacramento, CA · Acute Care Hospital · CCN 050108
Practice locations
Addresses where Gregory Y. Warner is enrolled with Medicare (CMS data updated 2026-10-02).
- 1010 Nut Tree Rd, 100 Wound CareVacaville, CA 95687 (707) 624‑7979
- 1010 Nut Tree Rd, Suite 100b and 200Vacaville, CA 95687 (707) 646‑7999
- 1860 Pennsylvania AveFairfield, CA 94533 (707) 646‑4114
Group practices
Medicare enrollment lists Gregory Y. Warner as a member of these groups (CMS data updated 2026-10-02).
- NorthBay Physicians Surgery Center, LLC324 clinicians in the group
- NorthBay Health Medical Foundation213 clinicians in the group
Specialties
- Infectious Diseaseprimary
Other infectious disease doctors in Vacaville
Clinicians with the same Medicare primary specialty in Vacaville, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1073704326 |
| 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