Quick answers
- Which hospitals does Mark L. Westphal work at?
- Medicare's official clinician data lists Mark L. Westphal at 1 hospital: St Joseph Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark L. Westphal see patients?
- Medicare's clinician data lists 1 practice location in Carbondale, IL. Call before your visit to confirm the address.
- What is Mark L. Westphal's specialty?
- Medicare lists Dermatology as the primary specialty.
- Does Mark L. Westphal accept Medicare assignment?
- Yes. Medicare's clinician data says Mark L. Westphal 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 L. Westphal?
- (618) 549-0841, as listed in official Medicare / NPI Registry data.
- What is Mark L. Westphal's NPI number?
- 1043388242. 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 L. Westphal works
Medicare's Facility Affiliation Data lists Mark L. Westphal at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- St Joseph Memorial HospitalMurphysboro, IL · Critical Access Hospital · CCN 141334
Practice locations
Addresses where Mark L. Westphal is enrolled with Medicare (CMS data updated 2026-10-02).
- 665 E Lake RdCarbondale, IL 62901 (618) 549‑0841
Specialties
- Dermatologyprimary
Other dermatologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1973 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043388242 |
| 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