Dr. Lanman attended the Oklahoma State University College of Osteopathic Medicine in Tulsa, OK, graduating in 1994. He completed his general surgery residency training through Michigan State University in Garden City, MI. He performs general, endoscopic and laparoscopic surgery. He completed board certification in General Surgery in 2001, and board recertification in 2011 and 2021. In the fall of 2011, his peers in the American College of Osteopathic Surgeons awarded Dr. Lanman the title Fellow of the American College of Osteopathic Surgeons.

Dr. Lanman joined Alexandria Clinic, P.A. in June 2000. He is a member of the American College of Osteopathic Surgeons and the American Osteopathic Association. Dr. Lanman lives in Alexandria with his family.