Meet Your Care Providers

Mimi Sorenson

Mimi Sorenson, N.P.

Mimi Sorenson is board certified by the American Association of Nurse Practitioners. She graduated from Cochise Community College with a degree in nursing she went on to graduate with a Bachelor’s in Nursing from Grand Canyon University and received her Master of Science in Nursing, Family Practitioner in 2018.  As… Read More »


Jeffrey Maurice Reagan, M.D.

~ Orhtopedic Surgery ~ Dr. Reagan is our newest addition at Arizona Mountain Orthopedics. Dr. Reagan, his wife, and three children joined us in August 2014 after completing his fellowship. He received his medical degree and residency training from Saint Louis University of Medicine. He also completed the Orthopedic Surgery… Read More »


J. Casey Heap, MD

~ Family Medicine~ J. Casey Heap received his He is board-certified in family medicine. Dr. Heap graduated from the University of Arizona College of Medicine in 2015, then completed his internship and residency at Medical Education and Research Foundation (MCMERF) in Waco, Texas. Dr. Heap is located at Summit Healthcare Mountain… Read More »


Don Shumay | Near Care Team

Don Shumway, D.P.M., P.C.

  Medical Degree– California College of Podiatry Medicine Residency– Astheticare Internship– Huhukam Memorial Hospital


Osaf Ahmed, M.D.

Osaf Ahmed, M.D.

~ Internal Medicine ~ Dr. Ahmed is a board certified internal medicine physician, treating patients just entering adulthood to those in their senior years. He graduated in 1987 from King Edward Medical College in Pakistan and completed his residency in internal medicine in 1999 at Staten Island University Hospital, Staten… Read More »


Armstrong,-Rachel-Revised

Rachel Armstrong, C.P.N.P.

~ Pediatrics ~ Rachel Armstrong is board certified in Pediatric Nursing. She received her Bachelor’s in Nursing from Arizona State University and her Masters in Nursing from Arizona State University. Rachel also received Post Master’s in Child and Adolescent Mental Health from Arizona State University. Prior to becoming a Pediatric… Read More »


Imran Ata, M.D.

~ Cardiology ~ Dr. Ata received his medical degree from Nishtar Medical College, Multan, Pakistan in 1985 and then completed his internship in Internal Medicine at Nishtar Medical College. He then joined the National Institute of Cardiovascular Diseases in Karachi, Pakistan and spent 7 years at the institute doing research… Read More »


Grant Burgess Radiology

Grant Berges, M.D.

~Radiology~ Specialty: Musculoskeletal Radiology Certification: American Board of Radiology, 2007 Medical School: University of Utah School ofMedicine, 2002 Residency: Indiana University, 2007 Fellowship: Musculoskeletal Radiology, IndianaUniversity, 2007     Imaging Specialists at Summit Healthcare Diagnostic Imaging Search Near Care Team Providers


Elizabeth Bierer, M.D.

~Family Medicine~ Dr. Bierer graduated from Blue Ridge High School and continued her education at the University of Arizona. After graduating from the U of A with a B.S. in Psychology, Dr. Bierer spent a year in South Carolina with AmeriCorp VISTA assisting Commune-i-Care, a not-for-profit organization, helping the medically… Read More »


Curtis Birdno, P.A.-C.

~ Family Medicine ~ Curtis Birdno graduated from the University of Iowa with a Masters in P.A. studies in 2009. Curtis always desired to work in healthcare, it has been a passion of his along with science and the human body. Curtis is especially interested in working with pediatric patients… Read More »