OACM After Hours Catonsville hours are Monday and Friday 4:00 PM - 8:00 PM, and Saturdays 9:00 AM - 1:00 PM. We offer after hour care services for minor acute orthopaedic injuries such as sprains, strains, muscle pains, soreness, spasms, and more. All patients will be seen by one of our orthopaedic physician assistants for the evaluation and treatment of their orthopaedic-related injuries.