Our Doctors

Dr. Thomas P. Greiner, DVM

Dr. Greiner, owner of Oak Knoll and a native of Keota, IA, is a Diplomate of the American College of Veterinary Surgeons.  He is a Board Certified surgeon specializing in soft tissue.  Dr. Greiner graduated from the Iowa State College of Veterinary Medicine after which he completed his internship at The Animal Medical Center in New York City.  He then spent 14 years teaching surgery at the Animal Medical Center.

Dr. Greiner is a world renowned veterinarian, surgeon and teacher. He has authored many textbooks and scientific articles. He is also past president of the Illinois Veterinary Medical Association, the Mississippi Valley Veterinary Medical Association and the Quad City Veterinary Medical Association.

Dr. Shari L. Hagerty, DVM

Dr. Hagerty, originally from Epworth, IA, has been practicing at Oak Knoll for 8 years.  She attended the Iowa State College of Veterinary Medicine where she graduated in 1997.  She is a member of the American Veterinary Medical Association and the Illinois State Veterinary Medical Association. 

Dr. Hagerty enjoys the challenges of being a veterinarian, particularly the tough ones.  When she's not working she enjoys spending time with family, reading, exercising and her dog Scarlet, a Pomeranian.

Dr. Scott R. Macon, DVM

Dr. Macon has been practicing at Oak Knoll for over 2 years.  He attended Iowa State University where he received a Bachelor of Science in Biology and his DVM from the College of Veterinary Medicine.  Dr. Macon is a member of the American Veterinary Medical Association, the Illinois Veterinary Medical Association and the Omega Tau Sigma Veterinary Fraternity.  He is also our resident exotic species specialist.

When he's not at the office Dr. Macon is an avid sports fan and enjoys walking and riding bikes with his wife and daughter, landscaping and woodworking.