Quick answers
- Which hospitals does Karl Greer work at?
- Medicare's official clinician data lists Karl Greer at 3 hospitals: Petaluma Valley Hospital, Providence Santa Rosa Memorial Hospital and Sutter Santa Rosa Regional Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Karl Greer see patients?
- Medicare's clinician data lists 7 practice locations, including Petaluma, CA, Santa Rosa, CA and Rohnert Park, CA. Call before your visit to confirm the address.
- What is Karl Greer's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Karl Greer accept Medicare assignment?
- Yes. Medicare's clinician data says Karl Greer 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 Karl Greer?
- (707) 559-7500, as listed in official Medicare / NPI Registry data.
- What is Karl Greer's NPI number?
- 1396010740. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Karl Greer works
Medicare's Facility Affiliation Data lists Karl Greer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Petaluma Valley HospitalPetaluma, CA · Acute Care Hospital · CCN 050136
- Providence Santa Rosa Memorial HospitalSanta Rosa, CA · Acute Care Hospital · CCN 050174
- Sutter Santa Rosa Regional HospitalSanta Rosa, CA · Acute Care Hospital · CCN 050291
Practice locations
Addresses where Karl Greer is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 1179 N McDowell BlvdPetaluma, CA 94954 (707) 559‑7500
- 30 Mark W Springs RdSanta Rosa, CA 95403 (707) 576‑4500
- 34 Mark W Springs RdSanta Rosa, CA 95403
- 3883 Airway DrSanta Rosa, CA 95403
- 400 N McDowell BlvdPetaluma, CA 94954 (707) 778‑2631
Group practices
Medicare enrollment lists Karl Greer as a member of these groups (CMS data updated 2026-10-02).
- Sutter Bay Medical Foundation3,829 clinicians in the group
- Providence Medical Foundation1,466 clinicians in the group
- Petaluma Health Center Inc73 clinicians in the group
- Coastal Health Alliance37 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Petaluma
Clinicians with the same Medicare primary specialty in Petaluma, CA — not a recommendation.
Clinician information
| Medical school | University Of Texas Medical Branch At Galveston |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396010740 |
| 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