Dr. John M. Leib
Last updated: Sep 11, 2025

Dr. John M. Leib

  • Gender: Male
  • Experience: 34 years
  • Sole propriator: No
  • NPI: 1376604678

Dr. John M. Leib D.M.D.

Oral and Maxillofacial Surgeon

He is located at 741 West State Street Suite 3 in O Fallon, IL 62269. Can help patients with the following: Bad Breath, Dentin Hypersensitivity, Oral Cancer Examination, Root Canals, Teeth Straightening, Traumatic Dental Injury. His National Provider Identifier (NPI) number is 1376604678. Appointment can be made via the phone number (618) 628-1800. He is affiliated with 1 practices.

Conditions treated

Dr. John Mark Leib, being an oral and maxillofacial surgeon, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. John M. Leib.

  • Bad Breath
  • Bleeding Gums
  • Cavities
  • Cosmetic Dentistry
  • Cracked Tooth
  • Dental Bridges
  • Dental Crowns and Caps
  • Dental Emergency
  • Dental Exam and Cleaning
  • Dental Fillings and Repairs
  • Dental Implants
  • Dental Malocclusion
  • Dentin Hypersensitivity
  • Dentures
  • General Oral Health
  • Gum Disease / Gingivitis
  • Invisalign
  • Laser
  • Oral Cancer Examination
  • Oral Pain
  • Pericoronitis
  • Root Canal
  • Root Canals
  • Sinus Tract
  • Teeth Grinding
  • Teeth Sensitivity
  • Teeth Straightening
  • Teeth Whitening
  • Temporomandibular Joint Syndrome (TMJ)
  • Tongue Problems
  • Tooth Extraction
  • Traumatic Dental Injury
  • Veneers
  • Wisdom Teeth Removal

Additional Specialities

  • Dentist

Affiliated practices

Oral Surgeons of Southern Illinois
741 West State Street
O'Fallon, 62269 IL
(618) 628-1800

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Questions & Answers

Where can you meet with Dr. John Mark Leib?

Dr. John Mark Leib's office is located at 741 West State Street Suite 3 in O Fallon, IL 62269.

What conditions does Dr. John Mark Leib treat?

Dr. John Mark Leib provides treatment for Bad Breath, Dentin Hypersensitivity, Oral Cancer Examination, Root Canals, Teeth Straightening, Traumatic Dental Injury. For the full list see this list.

Does Dr. John Mark Leib accept insurance?

Unfortunately we don't have any information if Dr. John Mark Leib accepts insurance.

Does Dr. John Mark Leib have affiliation with practices?

Dr. John Mark Leib is affiliated with Oral Surgeons of Southern Illinois.