Quick answers
- Which hospitals does Samuel A. Johnson work at?
- Medicare's official clinician data lists Samuel A. Johnson at 3 hospitals: Northside Hospital Cherokee, Wellstar Cobb Medical Center and Wellstar Kennestone Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Samuel A. Johnson see patients?
- Medicare's clinician data lists 2 practice locations, including Marietta, GA. Call before your visit to confirm the address.
- What is Samuel A. Johnson's specialty?
- Medicare lists Nephrology as the primary specialty, and also Internal Medicine.
- Does Samuel A. Johnson accept Medicare assignment?
- Yes. Medicare's clinician data says Samuel A. Johnson 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 Samuel A. Johnson?
- (770) 427-7389, as listed in official Medicare / NPI Registry data.
- What is Samuel A. Johnson's NPI number?
- 1225255128. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Samuel A. Johnson works
Medicare's Facility Affiliation Data lists Samuel A. Johnson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northside Hospital CherokeeCanton, GA · Acute Care Hospital · CCN 110008
- Wellstar Cobb Medical CenterAustell, GA · Acute Care Hospital · CCN 110143
- Wellstar Kennestone Regional Medical CenterMarietta, GA · Acute Care Hospital · CCN 110035
Practice locations
Addresses where Samuel A. Johnson is enrolled with Medicare (CMS data updated 2026-10-02).
- 55 Whitcher St, Suite 460Marietta, GA 30060 (770) 427‑7389
- 711 Canton Rd NEMarietta, GA 30060 (404) 554‑2196
Group practices
Medicare enrollment lists Samuel A. Johnson as a member of these groups (CMS data updated 2026-10-02).
- Georgia Kidney Associates, Inc.16 clinicians in the group
- Preferred Vascular Services Northwest LLC12 clinicians in the group
Specialties
- Nephrologyprimary
- Internal Medicinealso
Other nephrologists in Marietta
Clinicians with the same Medicare primary specialty in Marietta, GA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Temple University School Of Medicine |
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1225255128 |
| 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