From 1996 to 2009, Dr. McCallen’s solo rural family practice in southwestern Colorado focused on wellness and corrective hormone therapy.

Education

• B.A. in Biochemistry from Cornell University
• MD from the University of Pittsburgh School of Medicine in 1990
• Residency in Family Medicine at the University of Wyoming-Casper in 1993
• Served as a civilian physician with the Air Force in Emergency Medicine for three years
• Board Certified in Family Medicine
• Member of the Endocrine Society
• Member of the International Hormone Society
• Member of the American Academy of Family Physicians
• Member of the Age Management Medicine Group