Quick answers
- Which hospitals does Theodore C. Marentis work at?
- Medicare's official clinician data lists Theodore C. Marentis at 5 hospitals: Mercy General Hospital, Mercy San Juan Medical Center, Methodist Hospital of Sacramento, Sierra Nevada Memorial Hospital and Woodland Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Theodore C. Marentis see patients?
- Medicare's clinician data lists 1 practice location in Sacramento, CA. Call before your visit to confirm the address.
- What is Theodore C. Marentis's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty, and also Nuclear Medicine.
- Does Theodore C. Marentis accept Medicare assignment?
- Yes. Medicare's clinician data says Theodore C. Marentis 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 Theodore C. Marentis?
- (916) 560-0319, as listed in official Medicare / NPI Registry data.
- What is Theodore C. Marentis's NPI number?
- 1740424134. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Theodore C. Marentis works
Medicare's Facility Affiliation Data lists Theodore C. Marentis at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy General HospitalSacramento, CA · Acute Care Hospital · CCN 050017
- Mercy San Juan Medical CenterCarmichael, CA · Acute Care Hospital · CCN 050516
- Methodist Hospital of SacramentoSacramento, CA · Acute Care Hospital · CCN 050590
- Sierra Nevada Memorial HospitalGrass Valley, CA · Acute Care Hospital · CCN 050150
- Woodland Memorial HospitalWoodland, CA · Acute Care Hospital · CCN 050127
Practice locations
Addresses where Theodore C. Marentis is enrolled with Medicare (CMS data updated 2026-10-02).
- 3000 Q St, Fl 1Sacramento, CA 95816 (916) 560‑0319
Group practices
Medicare enrollment lists Theodore C. Marentis as a member of this group (CMS data updated 2026-10-02).
- Dignity Health Medical Foundation1,184 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
- Nuclear Medicinealso
Other radiologists in Sacramento
Clinicians with the same Medicare primary specialty in Sacramento, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 2008 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740424134 |
| 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