Quick answers
- Which hospitals does Chad Johnston work at?
- Medicare's official clinician data lists Chad Johnston at 3 hospitals: Marshall Browning Hospital, Memorial Hospital of Carbondale and Pinckneyville Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Chad Johnston see patients?
- Medicare's clinician data lists 2 practice locations, including Du Quoin, IL. Call before your visit to confirm the address.
- What is Chad Johnston's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Chad Johnston accept Medicare assignment?
- Yes. Medicare's clinician data says Chad Johnston 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 Chad Johnston?
- (618) 542-2146, as listed in official Medicare / NPI Registry data.
- What is Chad Johnston's NPI number?
- 1538239520. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Chad Johnston works
Medicare's Facility Affiliation Data lists Chad Johnston at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Marshall Browning HospitalDu Quoin, IL · Critical Access Hospital · CCN 141331
- Memorial Hospital of CarbondaleCarbondale, IL · Acute Care Hospital · CCN 140164
- Pinckneyville Community HospitalPinckneyville, IL · Critical Access Hospital · CCN 141307
Practice locations
Addresses where Chad Johnston is enrolled with Medicare (CMS data updated 2026-10-02).
- 900 N Washington StDu Quoin, IL 62832 (618) 542‑2146
- PO Box, Suite 192Du Quoin, IL 62832
Group practices
Medicare enrollment lists Chad Johnston as a member of this group (CMS data updated 2026-10-02).
- Marshall Browning Hospital Association32 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Southern Illinois University School Of Medicine |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538239520 |
| 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