Quick answers
- Which hospitals does Mark Turrill work at?
- Medicare's official clinician data lists Mark Turrill at 5 hospitals: Adventist Health Clearlake, Adventist Health Howard Memorial, Adventist Health Ukiah Valley, Providence Queen of the Valley Medical Center and Sutter Lakeside Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Turrill see patients?
- Medicare's clinician data lists 1 practice location in Lakeport, CA. Call before your visit to confirm the address.
- What is Mark Turrill's specialty?
- Medicare lists Medical Oncology as the primary specialty.
- Does Mark Turrill accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Turrill 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 Mark Turrill?
- (707) 263-6885, as listed in official Medicare / NPI Registry data.
- What is Mark Turrill's NPI number?
- 1568542314. 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 Turrill works
Medicare's Facility Affiliation Data lists Mark Turrill at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health ClearlakeClearlake, CA · Critical Access Hospital · CCN 051317
- Adventist Health Howard MemorialWillits, CA · Critical Access Hospital · CCN 051310
- Adventist Health Ukiah ValleyUkiah, CA · Acute Care Hospital · CCN 050301
- Providence Queen of the Valley Medical CenterNapa, CA · Acute Care Hospital · CCN 050009
- Sutter Lakeside HospitalLakeport, CA · Critical Access Hospital · CCN 051329
Practice locations
Addresses where Mark Turrill is enrolled with Medicare (CMS data updated 2026-10-02).
- 5196 Hill Rd E, Suite 300Lakeport, CA 95453 (707) 263‑6885
Group practices
Medicare enrollment lists Mark Turrill as a member of this group (CMS data updated 2026-10-02).
- Sutter Bay Hospitals48 clinicians in the group
Specialties
- Medical Oncologyprimary
Other oncologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Washington University School Of Medicine |
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1568542314 |
| 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