Quick answers
- Which hospitals does Robert S. Kollen work at?
- Medicare's official clinician data lists Robert S. Kollen at 4 hospitals: Coalinga Regional Medical Center, Modoc Medical Center, Orchard Hospital and Surprise Valley Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Robert S. Kollen see patients?
- Medicare's clinician data lists 3 practice locations, including Colusa, CA and Cedarville, CA. Call before your visit to confirm the address.
- What is Robert S. Kollen's specialty?
- Medicare lists Emergency Medicine as the primary specialty, and also Internal Medicine.
- Does Robert S. Kollen accept Medicare assignment?
- Yes. Medicare's clinician data says Robert S. Kollen 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 Robert S. Kollen?
- (209) 287-6308, as listed in official Medicare / NPI Registry data.
- What is Robert S. Kollen's NPI number?
- 1073554531. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Robert S. Kollen works
Medicare's Facility Affiliation Data lists Robert S. Kollen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Coalinga Regional Medical CenterCoalinga, CA · Critical Access Hospital · CCN 051338
- Modoc Medical CenterAlturas, CA · Critical Access Hospital · CCN 051330
- Orchard HospitalGridley, CA · Critical Access Hospital · CCN 051311
- Surprise Valley Community HospitalCedarville, CA · Critical Access Hospital · CCN 051308
Practice locations
Addresses where Robert S. Kollen is enrolled with Medicare (CMS data updated 2026-10-02).
- 173 E Webster StColusa, CA 95932 (209) 287‑6308
- 741 N Main StCedarville, CA 96104
- PO Box, Suite 246Cedarville, CA 96104
Group practices
Medicare enrollment lists Robert S. Kollen as a member of these groups (CMS data updated 2026-10-02).
- American Specialty Physicians Group Inc100 clinicians in the group
- Surprise Valley Health Care District7 clinicians in the group
Specialties
- Emergency Medicineprimary
- Internal Medicinealso
Other emergency medicine doctors in Colusa
Clinicians with the same Medicare primary specialty in Colusa, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Minnesota Medical School |
| Graduation year | 1969 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1073554531 |
| 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