Quick answers
- Which hospitals does Mark L. Siefring work at?
- Medicare's official clinician data lists Mark L. Siefring at 1 hospital: Norton Hospitals, Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark L. Siefring see patients?
- Medicare's clinician data lists 1 practice location in Louisville, KY. Call before your visit to confirm the address.
- What is Mark L. Siefring's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Mark L. Siefring accept Medicare assignment?
- Yes. Medicare's clinician data says Mark L. Siefring 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. Siefring?
- (502) 456-7047, as listed in official Medicare / NPI Registry data.
- What is Mark L. Siefring's NPI number?
- 1245729870. 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. Siefring works
Medicare's Facility Affiliation Data lists Mark L. Siefring at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Norton Hospitals, IncLouisville, KY · Acute Care Hospital · CCN 180088
Practice locations
Addresses where Mark L. Siefring is enrolled with Medicare (CMS data updated 2026-10-02).
- 1250 Bardstown Rd, Suite 8Louisville, KY 40204 (502) 456‑7047
Group practices
Medicare enrollment lists Mark L. Siefring as a member of this group (CMS data updated 2026-10-02).
- Community Medical Associates Inc1,372 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Louisville
Clinicians with the same Medicare primary specialty in Louisville, KY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Louisville School Of Medicine |
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245729870 |
| 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