Administrative Office

22 South Market St., Ste. 6D
Frederick, MD 21701

Phone: 301-682-5683
Fax: 301-682-3499
Mobile Clinic Phone: 410-340-3791
Email: main@aMissionofMercy.org


Medical and Dental Team

Michael Sullivan, M.D. – Chief Medical Director
Roslyn Robinson-Kellum, RN, DDS – Dental Director
Melissa LePlatt, CRNP – Staff Clinician
Sandi Cadigan, RN – Nursing Director
Kari German-Hogan, RN – Assistant Nursing Director
Errol Kellum – Dental Coordinator
Todd Orndorff and Dana Deyton – Equipment Managers (job sharing)


Executive Administrative Staff

Linda Ryan
Executive Director

Jennifer White
Development Director

Julie Wohlfarth
Development Assistant

Cindy Canizales
Administrative Assistant