Quick answers
- Which hospitals does Mark A. Williams work at?
- Medicare's official clinician data lists Mark A. Williams at 3 hospitals: Johnson City Medical Center, Sycamore Shoals Hospital and Wellmont Holston Valley Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark A. Williams see patients?
- Medicare's clinician data lists 1 practice location in Johnson City, TN. Call before your visit to confirm the address.
- What is Mark A. Williams's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Mark A. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Mark A. Williams 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 A. Williams?
- (423) 794-5500, as listed in official Medicare / NPI Registry data.
- What is Mark A. Williams's NPI number?
- 1033114988. 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 A. Williams works
Medicare's Facility Affiliation Data lists Mark A. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Johnson City Medical CenterJohnson City, TN · Acute Care Hospital · CCN 440063
- Sycamore Shoals HospitalElizabethton, TN · Acute Care Hospital · CCN 440018
- Wellmont Holston Valley Medical CenterKingsport, TN · Acute Care Hospital · CCN 440017
Practice locations
Addresses where Mark A. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 301 Med Tech PkwyJohnson City, TN 37604 (423) 794‑5500
Group practices
Medicare enrollment lists Mark A. Williams as a member of this group (CMS data updated 2026-10-02).
- State of Franklin Healthcare Associates, PLLC249 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Johnson City
Clinicians with the same Medicare primary specialty in Johnson City, TN — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Tennessee, Hsc, College Of Medicine |
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1033114988 |
| 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