Summary

Dr. Mark Walshauser specializes in oncology, bringing two decades of experience to cancer care. He earned his medical degree from Ross University School of Medicine and completed his residency at St. Louis University School of Medicine. Dr. Walshauser speaks English and has dedicated his career to helping patients navigate cancer treatment with expertise and compassion.

Dr. Walshauser practices at multiple locations across Illinois, including O'Fallon and Highland, with affiliations at HSHS Saint Elizabeth's Hospital, HSHS Saint Joseph's Hospital Highland, and several other medical centers. He treats patients with various forms of cancer, including lung cancer and non-small cell lung cancer. His practice also includes managing conditions like iron deficiency anemia that can accompany cancer treatment. Patients rate Dr. Walshauser an average of 3.1 out of 5 stars for his care.

AI-generated from data on this provider profile.

Quick Facts

  • accepting new patients
  • 3.1
  • 20 years of experience
  • speaks English
  • St Louis University School Of Medicine
  • 6 written reviews
  • 1 specialty
  • 8 areas of expertise
  • 1 board certification
  • 6 hospital affiliations
  • 6 office locations
  • Male

Office Locations

Dr. Mark Andrew Walshauser has 6 locations

Cancer Care Center Of Ofallon

321 Regency ParkO Fallon, IL 62269
Mon8:00 am - 4:30 pm
Tue8:00 am - 4:30 pm
Wed8:00 am - 4:30 pm
Thu8:00 am - 4:30 pm
Fri8:00 am - 4:30 pm
SatClosed
SunClosed

Cancer Care Specialists Of Illinois

12860 Troxler Ave Ste 135Highland, IL 62249
MonClosed
TueClosed
WedClosed
Thu8:00 am - 4:30 pm
FriClosed
SatClosed
SunClosed

Hshs Saint Josephs Hospital Highland

12866 Troxler AveHighland, IL 62249

Sparta Community Hospital

818 E Broadway StSparta, IL 62286

Hshs Saint Elizabeths Hospital

1 Saint Elizabeth BlvdO Fallon, IL 62269

Memorial Hospital Shiloh

1404 Cross StO Fallon, IL 62269

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Dr. Mark Andrew Walshauser, MD
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Dr. Mark Andrew Walshauser, MDSarah Marie MccaffreyDr. Susan L HaysDr. Christopher W Hugge, MD
OncologyNurse PractitionerNurse PractitionerPediatrics
Accepts New Patients Accepts New Patients Accepts New Patients
3.1 
20 Years of Experience 27 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English, Spanish Speaks English Speaks English
O Fallon , ILO Fallon , ILSaint Louis , MOSaint Louis , MO
Med School: ROSS UNIVERSITY SCHOOL OF MEDICINE Med School: St Louis University School Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Mark Andrew Walshauser

  • Accepts Medicare
  • Accepts Medicaid

Medical Specialties

Dr. Mark Andrew Walshauser has the following specialty

Specialty Expertise

Dr. Mark Andrew Walshauser has the following 8 areas of expertise

  • Blood Cancer
  • Bone Marrow Transplant
  • Chemotherapy
  • Hodgkin's Lymphoma
  • Leukemia
  • Lymphoma
  • Myelofibrosis
  • Myeloma

Certifications, License, & Education

20 Years Experience

MEDICAL LICENSE

Medical Doctor, Illinois, 2026, Active

EDUCATION & TRAINING

Residency

St Louis University School Of Medicine

Medical School

ROSS UNIVERSITY SCHOOL OF MEDICINEGraduated in 2007
Ross University School Of MedicineGraduated in 2006

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Frequently Asked Questions

Which hospitals is Dr. Mark Walshauser affiliated with?
Dr. Mark Walshauser is affiliated with Hshs Saint Elizabeths Hospital, Hshs Saint Josephs Hospital Highland, Sparta Community Hospital, Memorial Hospital Shiloh, Hshs Saint Josephs Hospital Breese, and HSHS HOLY FAMILY HOSPITAL.
Where is Dr. Mark Walshauser's office located?
Dr. Mark Walshauser's office is located at 321 Regency Park, O Fallon, IL, 62269.
Does Dr. Mark Walshauser accept virtual/telehealth appointments?
Dr. Mark Walshauser has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
How can I make an appointment with Dr. Mark Walshauser?
You can find contact information for Dr. Mark Walshauser here on Vitals.
Does Dr. Mark Walshauser accept my insurance?
You can see the insurance plans that Dr. Mark Walshauser accepts on their Vitals profile.

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