About Us

Associates in Women’s Health Care was established in 1971 and is the premier ob/gyn group proudly serving the women of Pueblo and the surrounding areas. Our practice consists of 7 physicians and 2 certified nurse midwives to serve any of your women’s health needs. Our providers specialize in routine and high risk pregnancy care, abnormal uterine bleeding, pelvic organ prolapse, urinary incontinence, PCOS, endometriosis, pelvic pain, infertility, and more. We also specialize in minimally invasive surgery including laparoscopy, hysteroscopy, endometrial ablation, urethral slings, Interstim, and Da Vinci robotic assisted procedures. We are accepting new patients and take most insurance plans. Call one of our 2 office locations to make an appointment, we would love to see you!

Our Providers

Sara Tonsing, M.D.

Dr. Sara Tonsing graduated from the College of Wooster and followed in her father's and grandfather's steps by going into medicine.

Kristin Kruse, M.D.

Dr. Kruse has been here in Pueblo with Associates in Women’s Health Care since 2001.

Joseph Castelli, M.D.

Dr. Joe Castelli practiced in Tennessee for eight years before joining Associates in Women's Health Care in 2009.

Fernando Mahmoud, M.D.

Dr. Fernando Mahmoud was born in Buenos Aires, Argentina. He moved to the United States in 2004.

Amy Yuan, D.O.

Dr Yuan's goal is to provide a comfortable and safe space to address sensitive issues for women in the Pueblo.

Ginger Frederiksen, MD

Dr. L. Ginger Frederiksen is a Board Certified Ob/Gyn specialist who has been in practice since 2000.

Melissa Dion

**New physician joining Sept 2020**


Susan Czelusta, CNM

Susan Czelusta was born and raised in California. She attended Saint Louis University to pursue her passion in healthcare.

Jennifer Roberts, CNM

Jennifer Roberts, CCNM provides care to women during the entire course of their pregnancy and postpartum.

Associates in Women's Health Care, Pueblo, Colorado


Pueblo, Colorado OBGYN Doctors

Court St. Location

Pueblo, Colorado OBGYN Doctors

North Side Location