4.8
8 Ratings with 3 written Reviews
Summary
Dr. Clay Demattei treats colon polyps, diverticular disease, and diverticulosis, and performs colonoscopy, lower GI endoscopy, and laparoscopy. He practices surgery and is affiliated with Deaconess Illinois Medical Center and Marion VA Medical Center, with 45 years of experience in the field.
Dr. Demattei earned his medical degree from Loyola University of Chicago Stritch School of Medicine and completed his residency at Marshall University School of Medicine. He sees patients in Marion, Illinois, and speaks English and Spanish. Patients on Vitals rate Dr. Demattei 4.75 out of 5.
Dr. Demattei earned his medical degree from Loyola University of Chicago Stritch School of Medicine and completed his residency at Marshall University School of Medicine. He sees patients in Marion, Illinois, and speaks English and Spanish. Patients on Vitals rate Dr. Demattei 4.75 out of 5.
Overview based on verified provider data
Quick Facts
- accepting new patients
- 45 years of experience
- speaks English, Spanish
- Marshall University School Of Medicine
- 3 written reviews
- 2 specialties
- 2 areas of expertise
- 2 hospital affiliations
- 3 office locations
- Male
Patients’ Perspective
- Gave an accurate diagnosis
- Had a good bedside manner
- Spent time with me
Based on patient feedback. Read the reviews
Office Locations
Dr. Clay Ohara Demattei has 3 locationsHeartland Surgery Llc
3402 Office Park DrMarion, IL 62959 Tel: (618) 993-3221
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 Tel: (618) 993-1400
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
Compare with Similar Doctors
 |  |  | |
| Dr. Clay Ohara Demattei I, MD | Dr. Sonal Devendra Shah, MD | Dr. Patricia A Boudet | Dr. Jeffery Scott Hunt |
| Surgery | Hospital Medicine | Other | Other |
| Accepts New Patients | |||
| 45 Years of Experience | 12 Years of Experience | ||
| No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option |
| Speaks English, Spanish | |||
| Marion , IL | Carbondale , IL | Carbondale , IL | Marion , IL |
| Med School: Loyola University Of Chicago Stritch School Of Medicine | Med School: American University Of Integrative Sciences St Maartin Sch Of Med | ||
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. Clay Ohara Demattei
Medical Specialties
Dr. Clay Ohara Demattei has the following 2 specialties
Specialty Expertise
Dr. Clay Ohara Demattei has the following 2 areas of expertise
Certifications, License, & Education
45 Years Experience
Dr. Clay Ohara Demattei holds an expired medical license in the state of Illinois.
Medical License
Medical Doctor with an expired medical license in the state of Illinois that expired in 2026.
Education & Training
Residency
Completed their residency at Marshall University School Of Medicine.
Medical School
Graduated from Loyola University Of Chicago Stritch School Of Medicine in 1981.
NPI Number
Dr. Demattei's NPI number is 1881621910.
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Frequently Asked Questions
- Which hospitals is Dr. Clay Demattei affiliated with?
- Dr. Clay Demattei is affiliated with Deaconess Illinois Medical Center and Marion Va Medical Center.
- Does Dr. Clay Demattei accept my insurance?
- You can see the insurance plans that Dr. Clay Demattei accepts on their Vitals profile.
- 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.
- Where is Dr. Clay Demattei's office located?
- Dr. Clay Demattei's office is located at 3402 Office Park Dr, Marion, IL, 62959.
- What languages does Dr. Clay Demattei speak?
- Dr. Clay Demattei speaks English and Spanish.
Data Sources
This provider profile is built using data from:
- NPPES NPI Registry
- State medical licensing boards
- Healthcare system and provider network data
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