Quick answers
- Which hospitals does Mark Twedt work at?
- Medicare's official clinician data lists Mark Twedt at 5 hospitals: Piedmont Athens Regional Medical Center, Piedmont Walton Hospital, St Mary's Hospital, St Marys Good Samaritan Hospital and Ty Cobb Regional Medical Center, LLC. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Twedt see patients?
- Medicare's clinician data lists 2 practice locations, including Athens, GA. Call before your visit to confirm the address.
- What is Mark Twedt's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Mark Twedt accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Twedt 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 Mark Twedt?
- (706) 475-7000, as listed in official Medicare / NPI Registry data.
- What is Mark Twedt's NPI number?
- 1811293525. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark Twedt works
Medicare's Facility Affiliation Data lists Mark Twedt at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Piedmont Athens Regional Medical CenterAthens, GA · Acute Care Hospital · CCN 110074
- Piedmont Walton HospitalMonroe, GA · Acute Care Hospital · CCN 110046
- St Mary's HospitalAthens, GA · Acute Care Hospital · CCN 110006
- St Marys Good Samaritan HospitalGreensboro, GA · Critical Access Hospital · CCN 111329
- Ty Cobb Regional Medical Center, LLCLavonia, GA · Acute Care Hospital · CCN 110027
Practice locations
Addresses where Mark Twedt is enrolled with Medicare (CMS data updated 2026-10-02).
- 1199 Prince AveAthens, GA 30606 (706) 475‑7000
- 1230 Baxter StAthens, GA 30606 (706) 548‑7581
Group practices
Medicare enrollment lists Mark Twedt as a member of these groups (CMS data updated 2026-10-02).
- Radiology Associates of North Georgia36 clinicians in the group
- Athens Radiology Associates PC35 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Athens
Clinicians with the same Medicare primary specialty in Athens, GA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Mercer University School Of Medicine |
| Graduation year | 2011 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811293525 |
| 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