Quick answers
- Which hospitals does Ronald B. Garren work at?
- Medicare's official clinician data lists Ronald B. Garren at 1 hospital: Community Hospital of the Monterey Peninsula. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ronald B. Garren see patients?
- Medicare's clinician data lists 1 practice location in Monterey, CA. Call before your visit to confirm the address.
- What is Ronald B. Garren's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Hematology/Oncology.
- Does Ronald B. Garren accept Medicare assignment?
- Yes. Medicare's clinician data says Ronald B. Garren 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 Ronald B. Garren?
- (831) 375-4105, as listed in official Medicare / NPI Registry data.
- What is Ronald B. Garren's NPI number?
- 1720152663. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ronald B. Garren works
Medicare's Facility Affiliation Data lists Ronald B. Garren at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Community Hospital of the Monterey PeninsulaMonterey, CA · Acute Care Hospital · CCN 050145
Practice locations
Addresses where Ronald B. Garren is enrolled with Medicare (CMS data updated 2026-10-02).
- 5 Harris Ct, Suite 201Monterey, CA 93940 (831) 375‑4105
Group practices
Medicare enrollment lists Ronald B. Garren as a member of this group (CMS data updated 2026-10-02).
- Monterey Bay Oncology a Medical Corporation16 clinicians in the group
Specialties
- Internal Medicineprimary
- Hematology/Oncologyalso
Other internal medicine doctors in Monterey
Clinicians with the same Medicare primary specialty in Monterey, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 1966 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720152663 |
| 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