Dr. David W. Mathes

Gretchen Ahrendt, MD, is a breast surgeon at St. Anthony Hospital and St. Anthony North Hospital. She provides patient-centered care, prioritizing individual needs and preferences while emphasizing education to support shared decision-making. Dr. Ahrendt places a strong emphasis on open communication and empowers her patients to actively participate in their care plans.Dr. Ahrendt earned a Bachelor of Arts in Chemistry from Carleton College in Northfield, Minnesota, and her medical degree from Johns Hopkins University School of Medicine. She completed her residency and fellowship at The Johns Hopkins Hospital. She is a Fellow of the American College of Surgeons and a Fellow of the Society of Surgical Oncology.Outside of her medical practice, Dr. Ahrendt enjoys downhill, cross-country, and backcountry skiing, road and gravel cycling, traveling, cooking, and spending quality time with her family. Dr. Ahrendt is rated as a Distinguished provider by MediFind in the treatment of Intraductal Papilloma. Her top areas of expertise are Breast Cancer, Angiosarcoma, Inflammatory Breast Cancer, Mastectomy, and Lymphadenectomy.

Gerlinde Tynan is a General Surgeon in Longmont, Colorado. Dr. Tynan is rated as an Advanced provider by MediFind in the treatment of Intraductal Papilloma. Her top areas of expertise are Breast Cancer, Paget Disease of the Breast, Intraductal Papilloma, HER-2 Positive Breast Cancer, and Lymphadenectomy. Dr. Tynan is currently accepting new patients.

Nancy Taft, MD, is a breast surgical oncologist at CommonSpirit Surgical Oncology Longmont and St. Anthony North Cancer Center. Dr. Taft's care philosophy centers on providing compassionate, personalized, and evidence-based care for every patient she treats. She believes the relationship between a patient and their surgeon is built on trust, empathy, and clear communication. Dr. Taft appreciates that breast cancer care extends beyond surgery and works closely with other specialists and disciplines to formulate a plan of care that helps patients navigate their journey so they can live their best lives.Dr. Taft earned a Bachelor of Science in Nursing from Southern Illinois University. She completed her General Surgery Residency at the Medical College of Wisconsin and her Breast Surgery Fellowship at Northwestern University. Dr. Taft served in the U.S. Army Reserves for 15 years and was honorably discharged at the rank of lieutenant colonel, deploying to Afghanistan twice as a trauma surgeon.Outside of her medical practice, Dr. Taft enjoys hiking, photography, reading, spending time with family and friends, and learning new things. Dr. Taft is rated as an Advanced provider by MediFind in the treatment of Intraductal Papilloma. Her top areas of expertise are Breast Cancer, Paget Disease of the Breast, Intraductal Papilloma, Angiosarcoma, and Lymphadenectomy.