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Midtown Obstetrics and Gynecology is comprised of seven board certified physicians, one certified nurse practitioner, one certified physician assistant and a friendly, qualified staff. Our priority is patient education and we recognize the importance of good communication. Please feel free to ask questions during your appointment. Our doctors and medical staff are happy to assist in any way possible.


Gerald Zarlengo, M.D.

Dr. Gerald Zarlengo is a Colorado native.  He attended the University of Colorado School of Medicine and completed his ObGyn residency at Saint Joseph Hospital in 1986.  At that time, he founded Midtown Obstetrics & Gynecology.  Dr. Zarlengo is Board Certified in      Obstetrics and Gynecology and is Past President of the medical staff of Saint Joseph Hospital.  He currently serves as Department Chairman for Obstetrics and Gynecology at Saint Joseph Hospital and has been voted one of Denver's best Obstetricians / Gynecologists in 5280's Top Doctors for 15 years running.
Dr. Zarlengo is married with two daughters.

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Elizabeth McCrann, M.D.

Dr. Elizabeth McCrann is an Iowa native and attended the University of Iowa School of Medicine.  She completed her ObGyn residency at Saint Joseph Hospital.  Upon completion of her residency in 1989, she joined Midtown Obstetrics & Gynecology.  Dr. McCrann is Board Certified in Obstetrics and Gynecology and is Past President of the Colorado Obstetrics & Gynecology Society.  She continues to be active in legislative issues that impact women's health.  In her free time, she enjoys traveling and outdoor activities with her husband.
 

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Jessica Johnson, M.D.

Dr. Jessica Johnson is a Minnesota native and received her medical degree from the University of Minnesota School of Medicine.  She completed her ObGyn residency at the University of Colorado.  After completing her residency, she joined Midtown Obstetrics & Gynecology in 1993.  Dr. Johnson is Board Certified in Obstetrics and Gynecology.  She is bilingual in Spanish and is married with two children.

 

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Cristee Offerdahl, M.D.

Dr. Cristee Offerdahl is a Nebraska native.  She attended the University of Nebraska School of Medicine.  She joined Midtown Obstetrics & Gynecology in 1997 following the completion of her ObGyn residency at the University of Colorado.  During her medical training, Dr. Offerdahl completed a one year fellowship with Duke University's Sarnoff Society in cardiovascular research.  Dr. Offerdahl is Board Certified in Obstetrics and Gynecology.  She is married and has three young children.
 

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Honey Onstad, M.D.

Dr. Honey Onstad is a Colorado native. She completed her undergraduate degree in Psychology and Women's Studies at the University of Colorado, Boulder. She then went on to receive her medical degree from the University of Colorado Health Sciences Center. Dr. Onstad completed her ObGyn residency at Saint Joseph Hospital in 2006. Dr. Onstad is Board Certified in Obstetrics and Gynecology. She has served as a volunteer physician on three international medical trips including projects in Thailand, Senegal and Peru. In her free time, she enjoys reading, hiking and skiing and is bilingual in Spanish.

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Jill Serrahn, M.D.

Dr. Jill Serrahn is an Illinois native. She attended the University of Iowa for college and the University of Illinois School of Medicine. She completed residency training at Exempla St. Joseph Hospital in Denver and joined Midtown Obstetrics & Gynecology in 2010. Dr. Serrahn is board certified in Obstetrics and Gynecology. She serves on the St. Joseph Hospital Perinatal Safety Committee and is passionate about elevating the community standards for patient care. She enjoys family time with her husband and children, skiing, biking, running and soccer.

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Lisa Schwebach, M.D.

Dr. Lisa Schwebach is a native of South Dakota. She attended South Dakota State University for her undergraduate degree and received her medical degree from Creighton University School of Medicine. She completed her ObGyn Residency at Exempla St. Joseph Hospital in 2007. After practicing for six years with Kaiser Permanente, she joined Midtown Obstetrics & Gynecology in 2013. Dr. Schwebach is board certified in ObGyn. She is married and has three young sons.

 

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Polly Warner, MSN, RNC, WHNP

Polly Warner, a New England native, went to the University of Vermont and completed her degree in Environmental Studies. She continued her education in Portland, Oregon where she completed a Registered Nursing Program. Polly worked as a labor and delivery nurse in the Columbia River Gorge for several years. She moved with her husband and three children to Colorado and completed a Masters Degree in Nursing in Women’s Health Care at the University of Colorado Health Sciences Center in 2002. Polly is a certified Nurse Practitioner. She enjoys staying up to date with the latest in medical research. In her spare time she is an avid cyclist, traveler, and reader.

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Heather Walker, PA

Heather Walker is a Colorado native. She attended CU Boulder for both her BA in Biology and her Master's degree in Cellular Biology. Heather completed her PA education at the University of Colorado Health Sciences Center in 2004 and has been working in OB/GYN ever since. With her husband and two children she enjoys traveling, hiking, and biking.

 
 

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Lynn Barta, M.D.

Dr. Lynn Barta joined Midtown Obstetrics & Gynecology in 2002 and worked with us until 2013. Dr. Barta no longer works at Midtown, she is now working full-time for Questcare as a laborist at Rose Hospital. She is keeping herself quite busy as Director of the Rose Laborist Program and as the Vice Chairman of the Rose ObGyn department. While we do miss her, we are happy that we will still be able to collaborate with her as she takes this next step in her career.

 

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