Our Staff

Timothy Derstine M.D.

• Degree: M.D.
• Received at: Temple University School of Medicine
• Other Credentials: Board-certified in General Psychiatry; Fellow - American Society of Addiction Medicine; Member of American Psychiatric Association, American Medical Association, Pennsylvania Medical Association, Pennsylvania Psychiatric Association
• Clinical Specialties: General adult psychiatry, with interests in bipolar disorder, addiction medicine, panic disorder, treatment resistant depression and combining medication management and psychotherapy.
• Practicing Since: 1997
• Positions Held/Honors Received: Active Staff member and Assistant Medical Director of the Mental Health Unit - Mount Nittany Medical Center
• Treatment Approach/Philosophy: Psychiatric assessment and treatment tailored to each individual's biological, psychological, social and spiritual context and needs.

A. John de Carle , M.D.

• Degree: M.D.
• Received at: University of Saskatchewan, Canada
• Other Training: Psychiatry residency training at Brown University.
• Other Credentials: Member of the American Psychiatric Association, American Medical Association, and the Pennsylvania Psychiatric Society.
• Clinical Specialties: General adult psychiatry; independent medical evaluations (IMEs).
• Practicing Since: 1997
• Positions Held/Honors Received: Psychiatrist with Susquehanna Valley Professional Associates (SVPA), Inc. Active staff member of Mount Nittany Medical Center.
• Treatment Approach/Philosophy: Biological therapies.

Dusti Welsh-Sharer, R.N.

Dusti has over four years of psychiatric experience, providing a caring, empathetic, nurturing environment for patients. She also has experience in emergency medicine and pharmacology. Her strong clinical and communication skills make her an excellent nurse coordinator for the TMS program.