Hematology
Mark Walshauser, M.D.
O Fallon, IL
Dr. Mark Walshauser, MD is an Internist who practices in O Fallon, IL. He is 48 years old and has been practicing for 20 years.
20+
Years in Practice
Peer Recognition
- Castle Connolly — Top Doctor
2022-2026 (5 years)
Clinical Focus
Subspecialties
Hematology & Oncology
Conditions & Treatments
LymphomaMultiple MyelomaMyelodysplastic SyndromeHematologic MalignanciesLeukemia
Practice Details
Hospital Affiliations
- Sparta Community Hospital
- St Johns Hospital
- HSHS St. Elizabeth's Hospital
- St Josephs Hospital
- HSHS Holy Family Hospital
Experience
20+ years in practice