Provider Directory / S / Mark Sitarik M.D. Mark Sitarik, M.D. Oncology Specialties: Oncology Phone Number: 303-385-2000 Fax: 303-267-4419 Website Link: https://www.rockymountaincancercenters.com/physicians/boulder/mark-sitarik/ Address: Rocky Mountain Cancer Center, LLP 4715 Arapahoe Ave, Boulder, CO 80301 Get Directions