About Angela C. Onwuanibe, MD. Angela C. Onwuanibe, MD is a psychiatrist who practices at Wmhs Behavioral Health Services located at 12502 Willowbrook Rd in Suite 380 in Cumberland, MD 21502 (Allegany County). Dr. Angela C. Onwuanibe may be affiliated with: Wmhs Behavioral Health Services in Cumberland, MD 21502.