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 Team
Michael Sullivan, M.D. – Chief Medical Director
Roslyn Kellum, RN, DDS, Dental Director
Barbara Rebele, PA – Staff Clinician
Maureen Liddle, RN – Nursing Director
Errol Kellum, Dental Coordinator
Todd Orndorff and Bill Orndorff, Equipment Managers (job sharing)
Executive Administrative Staff
Linda Ryan
Executive Director
Jennifer White
Development Director
Julie Wohlfarth
Development Assistant
Rachel Smith
Administrative Assistant
