Dr. Jack McMahon

Dr. Jack W. McMahon Jr. MD

We are pleased to announce Dr. Mcmahons provider team.


Your OB/Gyn provider TEAM is a partnership between Jack McMahon, MD and Becca Moore, APRN, FNP. Both providers are combining their skills and experience to provide you with excellent care. This new team continues offering you outstanding care from Jack McMahon, MD, and with the added benefit of being seen by our newest providers, Becca Moore, APRN FNP for your care needs. Throughout your patient care, you will see Dr. McMahon and Rebecca Moore.


Jack W. McMahon, Jr., MD is an obstertrician and gynecologist with Helena OB/GYN Associates P.C. Dr. McMahon,a graduate of Carroll College, received his medical degree from the University of Washington, Seattle. He completed his post graduate studies at Maricopa Medical Center in Phoenix, Arizona. He is a fellow in the American College of Obsterics and Gynecology, a memeber of the American Medical Association, the Montana Medical Association, and the American Association of Gynecologic Laporoscopists. As a Helena native, Dr. McMahon enjoys golf, skiing, mountain biking and spending time with his wife Leanne and children, Anna, Michael, Laura, Jackson, Mia, Tatum, Josie, and Allysa.

Undergraduate Degree: Carroll College

Medical School Attended: University of Washington, Seattle,WA

Residency: Maricopa Medical Center, Phoenix, AZ

Board Certification Date: ACOG 1989