About Us

Mark W. Sheppard, DDS

Dr. Sheppard was born in Florida. He attended school at Louisiana State University in New Orleans and earned his DDS degree in 1994. He is consistently staying on top of his continuing education.

Dr. Sheppard is a member of the following professional organizations:

  • American Dental Association
  • Idaho State Dental Association
  • North Idaho Dental Society
  • Seattle Study Club
  • Delta Sigma Delta Professional Fraternity (lifetime member)

In his spare time, Dr. Sheppard enjoys spending time with his wife and four children. He also enjoys hiking, skiing, fishing, gardening, reading and spending time with his friends. In past years he has done volunteer work in Central America and Mexico.

He tries to keep the practice as friendly as possible. He is always concerned about providing superior dental care at a reasonable price. The care and treatment we give comes naturally because we like to view our patients as family. He is proud of his dedication to each patient and will help everyone look and feel their best through outstanding dental care.


Our staff members include:

Melanie Sheppard  – Office Manager & Dr. Sheppard’s wife

  • Bachelor of Science in Biology from East Texas Baptist University in 1988
  • Moved to Lewiston in 1994 & began working for Dr. Sheppard in 1996 after teaching for eight years in both Louisiana and Idaho
  • Took accounting classes right here at Lewiston State College
  • Continuing education classes have been beneficial in relating her education background to modern dental practices
  • Loved Idaho and traveling the Northwest as well as spending time with family and friends
  • Has four children

Creta Rutt – Dental Assistant

  • Moved from Nebraska to the Lewiston Valley in 1998
  • Business college grad in 1975, and Dental Assisting Classes in 1994
  • Has been with Dr. Sheppard since 1994 and was certified in 1998
  • Two children and four grandchildren
  • Enjoys walking, gardening and volunteering in the local community with Salvation Army.

Sadie Jernigan – Registered Dental Hygienist

  • Graduated from Shasta College Dental Hygiene program in Redding, CA in 2011. Soon after she relocated to Lewiston with her husband Brendt and joined Dr. Sheppard’s Team.
  • She finds it very gratifying as a hygienist to give care to patients in a calm and caring atmosphere where their comfort and well being is the main concern.
  • Northern Idaho has been a great place to explore and continue their love at camping, fishing, hunting and four-wheeler riding.
  • They’re happy to call Lewiston home and look forward to starting a family here.


Julie Porter – Dental Assistant

  • Moved from St. Maries, ID and joined Dr. Sheppard’s Team in 2013
  • Completed Fundamentals of Dentistry and Expanded Functions through North Idaho College in 2011
  • Enjoys spending time with her family, camping, fishing and four-wheeling.

Tiffany Bambacigno – Clinical Coordinator

  • Moved from Grangeville, Id, has lived in the Lewiston valley since 1998
  • Many years experience with scheduling and customer service, joined Dr. Sheppard’s Team in 2013
  • Married to John with two energetic boys Lance and Zack
  • Likes to travel, read, spend time with family, and enjoys being outdoors.