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Answering a call to the medical profession, Dr. Mast earned his bachelor’s degree in biology from DePaul University and his Doctor of Osteopathic Medicine from Michigan State University College of Osteopathic Medicine. Dr. Mast completed his residency in pediatrics at Western Michigan University Homer Stryker M.D. School of Medicine.

An American Board of Pediatrics member, his experience includes private practice, newborn rounding in the hospital setting, and working in a rural health clinic. He is dedicated to ensuring his patients and their parents feel they are in good hands and feel confident that they are getting the best care.

Dr. Mast gives back to the community by volunteering to teach martial arts, and enjoys spending time with his wife, three sons, two daughters, and the family pets, a dog and a cat. In addition, His hobbies include soccer, martial arts, and off-roading either in his jeep or on his skateboard.


Monday, Wednesday and Friday:
Grand Lake Pediatrics
801 Pro Drive
Celina, OH 45822
Phone: 419.394.9579

Tuesday and Thursday:
Grand Lake Pediatrics Center
1010 Hager Street
St. Marys, OH 45885
Phone: 419.394.9579

Grand Lake Health System
200 St. Clair Street, St. Marys,
Ohio 45885-2400
| 1-419-394-3335 | 1-877-564-6897