All professionals at Mark J. Harris, DDS maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in the Dental field. Read on to learn more about our staff's experience and training.

Mark Harris, DDS

Dr. Harris graduated in 1987 from the University of Nebraska Dental School.  Afterward, he served in the United States Air Force for three years.  In his first year in the Air Force, he graduated from a General Practice Residency where he was trained by each dental specialist to perform advanced Oral Surgery, Periodontal surgery (gums), Endodontic therapy (root canals), and Prosthodontic therapies (dentures and crowns).  He took over an existing dental practice on November 8, 1991, which has been in the old Littleton neighborhood since the 1950s.  He and his wife Barbie have three grown children John (wife Sarah) their children/our grandchildren Lily & Jack. Michael (wife Rachel) and Hannah (boyfriend Cody).

Barbie Harris, LPN, Business Manager

Barbie and Mark met, while both serving in the USAF. They were married on June 9, 1990, in Watertown, WI. Barbie joined the practice on November 8, 1991. She truly cares about our patients and staff. Barbie also works at Kaiser Permanente at Lone Tree in the OB/GYN department.

Tina Alizadeh, RDH

Tina graduated from the University of Colorado with a Bachelors of Science in Bioscience and Dentistry.  Tina joined our team in April of 2024.  She has been working in dental hygiene since 1991.

Julie K., Dental Assistant, Front Desk

We are pleased to announce that Julie has joined our team in October of 2020. Julie joins us with thirty-five years of Dental experience. Her kind, efficient, hard-working personality is definitely an awesome addition to our team. Julie enjoys spending time with her grown children and grandchildren.