Columbine Family Practice Nurse Practioners & Physician Assistants

Doreena Casias-Estrada PA-C

Doreena, or “Doreen” as she likes to be addressed, hales from Chicago, Illinois. She has family roots in Colorado and is fluent in Spanish and speaks some Italian. She graduated with Honors from Chicago Cook County Hospital Physician Assistant Program in 1996, and is a Recipient of Two Gold Seals on the National Board of Exams, a Recipient of E.J.Feinhandler M.D. Memorial Scholarship Award and a Recipient of Harold Washington Acedemic Excellence Award. Doreen has clinical training from Northwestern Memorial Hospital in Chicago, Illinois in their Cardiac Thoracic Surgery/Orthopedics departments and from St Francis Hospital in Evanston, Illinois assisted in their Obstetrics and Gynecology surgery programs for vaginal deliveries and C-Sections.

She also has experience in General surgery and Emergency Medicine from Mt Sinai Hospital and Cook county Hospitals in Chicago, Illinois. Her 13 years of experience, vast knowledge of patient care and bubbly personality are great assets to Columbine Family Practice.

Doreen is “Happily” married with one daughter and enjoys the Colorado Mountains, operas and traveling. She is an educator at heart and enjoys the interaction she has between herself and her patients.

Stacey Josif PA-C

Stacey Josif is a Physician Assistant with interest in working with women and the elderly. She earned her Bachelors degree in Biology with a minor in Chemistry from Wittenberg University in Springfield, Ohio. She earned her Master of Science in Biomedical Sciences and Physician Assistant degree from the University of Toledo. During this time she also earned a graduate certificate in contemporary Gerontological Practice. Stacey has clinical experience in emergency medicine, general surgery and internal medicine from the Toledo Hospital in Toledo, Ohio and pediatrics care from the Toledo Children’s Hospital, Pediatric Emergency Department, also of Toledo, Ohio. With her Family Medicine experience from Family Medical Center of Temperance, Michigan and Obstetrics and Gynecology experience from A Woman’s Answer clinic in Toledo, Ohio,

Stacey brings a wealth of experience to our community here in Littleton. Stacey enjoys all aspects of Family Practice, particularly the opportunity to develop long-term, productive and meaningful relationships with her patients. She is an Ohio native but her love of the outdoors, for skiing, hiking and camping has brought her to Colorado.

Stefany Carstensen FNP-C

Stefany Carstensen is a Colorado native who graduated with her Bachelor's of Nursing from University of Colorado at Denver Health Sciences Center in 2000 Magna Cum Laude. She gained clinical experience in ICU, oncology, Reproductive Endocrinology, and finally Labor and Delivery/Women's Health before completing her Masters of Nursing at University of Colorado at Denver Health Sciences Center in 2008. She graduated with honors with an emphasis on Family Practice and education. She has been with Columbine Family Practice since February of 2009.

Stefany enjoys all aspects of family practice, and has a particular interest in pediatrics as well as women's health and reproductive issues. She was nominated for the Nightingale Nursing Award in 2008, which honors exemplary nurses in Colorado. She speaks excellent Spanish, and enjoys the opportunity to continue to expand upon her language skills. Stefany also has knowledge and experience with multiple Complementary and Alternative Medicine practices, and for patients who desire to treat their healthcare conditions with CAM, or simply want to live healthier lives, she can be a valuable resource.

Stefany lives with her husband and two rescue dogs, and particularly enjoys hiking in the Colorado Mountains, camping, running, yoga, and reading a great book.