Quick answers
- Which hospitals does Donald J. Greco work at?
- Medicare's official clinician data lists Donald J. Greco at 2 hospitals: Adventist Health Sonora and Mark Twain Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Donald J. Greco see patients?
- Medicare's clinician data lists 1 practice location in San Andreas, CA. Call before your visit to confirm the address.
- What is Donald J. Greco's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Donald J. Greco accept Medicare assignment?
- Yes. Medicare's clinician data says Donald J. Greco 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 Donald J. Greco?
- (209) 754-3521, as listed in official Medicare / NPI Registry data.
- What is Donald J. Greco's NPI number?
- 1740416767. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Donald J. Greco works
Medicare's Facility Affiliation Data lists Donald J. Greco at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health SonoraSonora, CA · Acute Care Hospital · CCN 050335
- Mark Twain Medical CenterSan Andreas, CA · Critical Access Hospital · CCN 051332
Practice locations
Addresses where Donald J. Greco is enrolled with Medicare (CMS data updated 2026-10-02).
- 768 Mountain Ranch RdSan Andreas, CA 95249 (209) 754‑3521
Group practices
Medicare enrollment lists Donald J. Greco as a member of this group (CMS data updated 2026-10-02).
- Mark Twain Medical Center27 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in San Andreas
Clinicians with the same Medicare primary specialty in San Andreas, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Missouri, Kansas City, School Of Medicine |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740416767 |
| 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