Quick answers
- Which hospitals does John Aaron work at?
- Medicare's official clinician data lists John Aaron at 3 hospitals: Erlanger Medical Center, Hamilton Medical Center and Parkridge Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Aaron see patients?
- Medicare's clinician data lists 1 practice location in Chattanooga, TN. Call before your visit to confirm the address.
- What is John Aaron's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Geriatric Medicine.
- Does John Aaron accept Medicare assignment?
- Yes. Medicare's clinician data says John Aaron 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 Aaron?
- (423) 266-1499, as listed in official Medicare / NPI Registry data.
- What is John Aaron's NPI number?
- 1629019922. 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 Aaron works
Medicare's Facility Affiliation Data lists John Aaron at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Erlanger Medical CenterChattanooga, TN · Acute Care Hospital · CCN 440104
- Hamilton Medical CenterDalton, GA · Acute Care Hospital · CCN 110001
- Parkridge Medical CenterChattanooga, TN · Acute Care Hospital · CCN 440156
Practice locations
Addresses where John Aaron is enrolled with Medicare (CMS data updated 2026-10-02).
- 975 E 3rd StChattanooga, TN 37403 (423) 266‑1499
Group practices
Medicare enrollment lists John Aaron as a member of these groups (CMS data updated 2026-10-02).
- Erlanger Health507 clinicians in the group
- Chattanooga Hamilton County Hospital Authority146 clinicians in the group
Specialties
- Internal Medicineprimary
- Geriatric Medicinealso
Other internal medicine doctors in Chattanooga
Clinicians with the same Medicare primary specialty in Chattanooga, TN — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1629019922 |
| 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