Otter Aspen, MD is a dermatologist and Mohs surgeon at Schweiger Dermatology Group. Dr. Aspen received his medical degree from Harvard University and completed his residency in dermatology at the Boston Medical Center, New England Medical Center in Boston, Massachusetts. Dr. Otter continued on to complete his fellowship in Mohs surgery and procedural dermatology at Benedetto Dermatology in Philadelphia, Pennsylvania. Dr. Aspen was the director of the department of Mohs surgery in Elk Grove, California and a Mohs surgeon at North Jersey Dermatology Center in Rockaway, New Jersey.