We are always available to talk with you and address your concerns. Please feel free to contact us during the following hours through our office phone number or e-mail address. After hours, you may contact us through our answering service.

Tuesday--Thursday: 8 a.m. – 5 p.m.
Friday: 8 a.m.—12 noon

Dr. Mark Gregston, D.D.S.

Denver Office:

7150 E. Hampden Ave., Suite 200
Denver, CO 80224

Phone: (303) 758-2366
Fax: (303) 756-1460

Map/Directions

Castle Rock Office:

4344 Woodlands Blvd., Suite 260
Castle Rock, CO  80104
Phone: (303) 688-0272

Map/Directions

Parker Office:

18801 E. Mainstreet, Suite 150
Parker, CO  80134
Phone: (303) 688-0272

Map/Directions

Email: info@gregstonorthodontics.com