Quick answers
- Which hospitals does Mark S. Sullivan work at?
- Medicare's official clinician data lists Mark S. Sullivan at 3 hospitals: Sutter Davis Hospital, Sutter Medical Center, Sacramento and Sutter Solano Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark S. Sullivan see patients?
- Medicare's clinician data lists 4 practice locations, including Fairfield, CA and Sacramento, CA. Call before your visit to confirm the address.
- What is Mark S. Sullivan's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Mark S. Sullivan accept Medicare assignment?
- Yes. Medicare's clinician data says Mark S. Sullivan 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 Mark S. Sullivan offer telehealth?
- Medicare's clinician data says Mark S. Sullivan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mark S. Sullivan?
- (707) 432-2500, as listed in official Medicare / NPI Registry data.
- What is Mark S. Sullivan's NPI number?
- 1871673723. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark S. Sullivan works
Medicare's Facility Affiliation Data lists Mark S. Sullivan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Sutter Davis HospitalDavis, CA · Acute Care Hospital · CCN 050537
- Sutter Medical Center, SacramentoSacramento, CA · Acute Care Hospital · CCN 050108
- Sutter Solano Medical CenterVallejo, CA · Acute Care Hospital · CCN 050101
Practice locations
Addresses where Mark S. Sullivan is enrolled with Medicare (CMS data updated 2026-10-02).
- 2700 Low CtFairfield, CA 94534 (707) 432‑2500
- 2702 Low CtFairfield, CA 94534 (707) 432‑2600
- 2720 Low CtFairfield, CA 94534 (707) 428‑2731
- 2800 L StSacramento, CA 95816
Group practices
Medicare enrollment lists Mark S. Sullivan as a member of this group (CMS data updated 2026-10-02).
- Sutter Valley Medical Foundation2,500 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Fairfield
Clinicians with the same Medicare primary specialty in Fairfield, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albert Einstein College Of Medicine Of Yeshiva University |
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1871673723 |
| 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