- Diplomate, The American Board of Internal Medicine
- Founder of Sundial Medical Center, August 2021
- Founder, David L Mellman MD PLLC at Colorado Center of Medical Excellence, October 2016 – August 2021
- Founder, Denver Internal Medicine, 1998 – 2016
- Graduate of Colorado College and the University of Colorado School of Medicine; Chief Resident University of Colorado Health Sciences Center; and Member, Alpha Omega Alpha, the National Medical Honor Society
- Chair, Internal Medicine, Rose Medical Center 2001-2016
- Practiced Internal Medicine at Rose Medical Center 1998-Present
- Chair, Internal Medicine and Team physician, Colorado Avalanche 1998-2016
- Peer Selected as 5280 “Top Internal Medicine Doctor” Eleven Times
- A gifted teacher and mentor, Dr. Mellman has received numerous teaching awards and continues to proctor medical professionals
