Quick answers
- Which hospitals does John J. Han work at?
- Medicare's official clinician data lists John J. Han at 5 hospitals: Baptist Health Medical Center - Jacksonville, Wellstar Cobb Medical Center, Wellstar Kennestone Regional Medical Center, Wellstar North Fulton Medical Center and Wellstar Paulding Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John J. Han see patients?
- Medicare's clinician data lists 4 practice locations, including Kennesaw, GA and Marietta, GA. Call before your visit to confirm the address.
- What is John J. Han's specialty?
- Medicare lists Hospitalist as the primary specialty, and also Internal Medicine.
- Does John J. Han accept Medicare assignment?
- Yes. Medicare's clinician data says John J. Han 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 John J. Han?
- (770) 424-8222, as listed in official Medicare / NPI Registry data.
- What is John J. Han's NPI number?
- 1346466364. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John J. Han works
Medicare's Facility Affiliation Data lists John J. Han at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Baptist Health Medical Center - JacksonvilleJacksonville, FL · Acute Care Hospital · CCN 100088
- Wellstar Cobb Medical CenterAustell, GA · Acute Care Hospital · CCN 110143
- Wellstar Kennestone Regional Medical CenterMarietta, GA · Acute Care Hospital · CCN 110035
- Wellstar North Fulton Medical CenterRoswell, GA · Acute Care Hospital · CCN 110198
- Wellstar Paulding Medical CenterHiram, GA · Acute Care Hospital · CCN 110042
Practice locations
Addresses where John J. Han is enrolled with Medicare (CMS data updated 2026-10-02).
- 5150 Stilesboro N W Rd, Suite 220Kennesaw, GA 30152 (770) 424‑8222
- 625 Church NestMarietta, GA 30060 (770) 422‑2004
- 677 Church NestMarietta, GA 30060
- 677 Church St NE, Suite 100pMarietta, GA 30060 (470) 793‑8585
Group practices
Medicare enrollment lists John J. Han as a member of this group (CMS data updated 2026-10-02).
- Wellstar Medical Group LLC3,093 clinicians in the group
Specialties
- Hospitalistprimary
- Internal Medicinealso
Other hospitalists in Kennesaw
Clinicians with the same Medicare primary specialty in Kennesaw, GA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Michigan State University College Of Osteopathic Medicine |
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346466364 |
| 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