Quick answers
- Which hospitals does John S. Millar work at?
- Medicare's official clinician data lists John S. Millar at 1 hospital: Kaiser Foundation Hospital - Vacaville. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John S. Millar see patients?
- Medicare's clinician data lists 1 practice location in Vacaville, CA. Call before your visit to confirm the address.
- What is John S. Millar's specialty?
- Medicare lists Critical Care (Intensivists) as the primary specialty.
- Does John S. Millar accept Medicare assignment?
- Yes. Medicare's clinician data says John S. Millar 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 John S. Millar?
- (707) 624-4000, as listed in official Medicare / NPI Registry data.
- What is John S. Millar's NPI number?
- 1023092871. 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 S. Millar works
Medicare's Facility Affiliation Data lists John S. Millar at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Kaiser Foundation Hospital - VacavilleVacaville, CA · Acute Care Hospital · CCN 050767
Practice locations
Addresses where John S. Millar is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Quality DrVacaville, CA 95688 (707) 624‑4000
Group practices
Medicare enrollment lists John S. Millar as a member of this group (CMS data updated 2026-10-02).
- Permanente Medical Group Inc10,996 clinicians in the group
Specialties
- Critical Care (Intensivists)primary
Find other Critical Care (Intensivists) doctors in California →
Other critical care doctors in Vacaville
Clinicians with the same Medicare primary specialty in Vacaville, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Howard University College Of Medicine |
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023092871 |
| 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