Summary

Dr. Clay Demattei is a surgeon with 45 years of experience serving patients in Marion, Illinois. He earned his medical degree from Loyola University of Chicago Stritch School of Medicine and completed his residency at Marshall University School of Medicine. His extensive background in surgery allows him to provide comprehensive care for a wide range of surgical needs. Dr. Demattei is fluent in both English and Spanish, enabling him to communicate effectively with diverse patient populations.

Dr. Demattei practices at several locations throughout Marion and maintains affiliations with Deaconess Illinois Medical Center and Marion Va Medical Center. He specializes in treating conditions such as colon polyps, diverticular disease, and diverticulosis. His expertise includes performing colonoscopies and lower GI endoscopy procedures with sedation to ensure patient comfort. Patients consistently rate his care highly, giving him an average rating of 4.8 out of 5 stars on Vitals.

AI-generated from data on this provider profile.

Quick Facts

  • accepting new patients
  • 4.8
  • 45 years of experience
  • speaks English, Spanish
  • Marshall University School Of Medicine
  • 3 written reviews
  • 2 specialties
  • 2 areas of expertise
  • 2 board certifications
  • 2 hospital affiliations
  • 3 office locations
  • Male

Office Locations

Dr. Clay Ohara Demattei has 3 locations

Heartland Surgery Llc

3402 Office Park DrMarion, IL 62959
Mon8:30 am - 4:30 pm
Tue8:30 am - 4:30 pm
Wed8:30 am - 4:30 pm
Thu8:30 am - 4:30 pm
Fri8:30 am - 4:30 pm
SatClosed
SunClosed

Marion Healthcare Surgery Center

3003 Civic Circle Blvd Ste 200Marion, IL 62959
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Deaconess Illinois Medical Center

3333 W Deyoung StMarion, IL 62959

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Dr. Clay Ohara Demattei, MD
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Dr. Clay Ohara Demattei, MDDr. Mary Jean Remedio LiDr. Daniel W RallsCandra Dawn Kronewitter
SurgeryOtherOtherNurse Practitioner
Accepts New Patients
4.8 
45 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English, Spanish
Marion , ILMarion , ILCarbondale , ILCarbondale , IL
Med School: Loyola University Of Chicago Stritch School Of Medicine
Current Profile
View Profile View Profile View Profile

Insurance Plans Accepted by Dr. Clay Ohara Demattei

  • Accepts Medicare
  • Accepts Medicaid

Medical Specialties

Dr. Clay Ohara Demattei has the following 2 specialties

Specialty Expertise

Dr. Clay Ohara Demattei has the following 2 areas of expertise

  • Laparoscopic Surgery (Laparoscopy)
  • Other

Certifications, License, & Education

45 Years Experience

MEDICAL LICENSE

Medical Doctor, Illinois, 2026, Active

EDUCATION & TRAINING

Residency

Marshall University School Of Medicine

Medical School

Loyola University Of Chicago Stritch School Of MedicineGraduated in 1981

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Frequently Asked Questions

Is Dr. Clay Demattei accepting new patients?
Dr. Clay Demattei is accepting new patients on Vitals. View Dr. Clay Demattei's profile on Vitals to make an appointment.
Does Dr. Clay Demattei accept virtual/telehealth appointments?
Dr. Clay Demattei 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. Clay Demattei?
You can find contact information for Dr. Clay Demattei here on Vitals.
Does Dr. Clay Demattei accept my insurance?
You can see the insurance plans that Dr. Clay Demattei accepts on their Vitals profile.
Where is Dr. Clay Demattei's office located?
Dr. Clay Demattei's office is located at 3402 Office Park Dr, Marion, IL, 62959.

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