Helena OB/GYN, PC

Choosing an OB/GYN provider is a very personal choice.


Helena OB/GYN, PC is a premier OB/GYN specialty clinic exceeding the expectations for the next generation of women’s healthcare in Helena, Montana. Dr. Jack W. McMahon, the founding Physician of Helena OB/GYN, is proud to announce the addition of two highly trained OB/GYN female physicians to the practice. Dr. Alexis O’Leary joined the practice in 2018 and we welcomed Dr. Jessica Parson in the following year. Not only are our Physicians highly trained in OB/GYN care, they are the only OB/GYN Physicians fully trained and certified for the DaVinci Robotic Surgical System in Helena. The staff of Helena OB/GYN believes that every woman deserves the choice for her obstetrical and gynecological care. Helena OB/GYN consistently provides exceptional obstetrics and gynecological care in a supportive, compassionate environment.


Our providers facilitate a supportive environment that fosters open communication, patient comfort, education, and the best obstetrical and gynecological care available. We believe in supporting and educating our patients to make informed decisions about their health and present a full spectrum of choices, including but not limited to:


High-risk Pregnancy

Infertility Treatments

Da Vinci Robotically Assisted Surgeries



Pap Smear

Annual Well-Women Exams

Primary Care

Birth Control

IUDS, Depoprovera and Nexplanons

Menstrual Irregularities

Pelvic Pain




STD screening

Menopause Management

Hormone Replacement Therapy


Minimally Invasive Gynecologic Surgeries

Genital prolapse care and Surgeries

Incontinence care

  • What makes us different?

    Helena OB/GYN strives to treat every patient with compassion and provide customized care for each individual patient. We understand no two patients are the same and that is why we care for each patient to meet their unique needs. Our physicians are the only OB/GYN surgeons in Helena certified and fully trained to operate the daVinci Robotic Surgical System. Not only does Helena OB/GYN provide state of the art surgery, we also cater to those who struggle with pregnancy by specializing in infertility. With an in-house ultrasound we are able to meet all of our patient’s ultrasound, obstetrics and gynecological needs within one building. We have also added a mental health specialist to help with any mental health issues as needed for our patients.

  • Putting the provide in Providers

    Dr. McMahon, Dr. O’Leary, and Dr. Parson regularly complete specialty training and updated courses to keep up with the latest advances in women’s healthcare. As leaders in women’s healthcare, we are committed to providing superior obstetrical and gynecological care for all stages of a women’s life.

View more info on our Staff and Clinicians!

FACOG – It stands for “Fellow, American College of Obstetricians and Gynecologists.” ACOG is the nation’s leading group of professionals providing health care for women. The American College of Obstetricians and Gynecologists:

Serves as a strong advocate for quality health care for women

Maintains the highest standards of clinical practice

Provides continuing education of its members

Promotes patient education

Increases awareness among its members and the public of the changing issues facing women's health care