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Obsessive-Compulsive Disorder (OCD) – Characterized by recurring, unwanted, intrusive ideas, images, or impulses and unrelenting urges to act on the impulses. The obsessions and compulsions cause great distress and interfere with school and relationships. Children with OCD often worry or fear that they or loved ones will be harmed and feel compelled to do something to neutralize their fear.

OCYF – Office of Children, Youth and Families

ODAP – Office of Drug and Alcohol Programs

ODP – Office of Developmental Programs

OIS – Office of Information Systems

OMA – Office of Medical Assistance

OMAP – Office of Medical Assistance Programs

OMB – Office of Management and Budget

OMH – Office of Mental Health

OMHC – Outpatient Mental Health Center

OMHSAS – Office of Mental Health and Substance Abuse Services

ONDCP – Office of National Drug Control Policy

OP – Outpatient Services

Oppositional Defiant Disorder – A recurring pattern of negative, defiant, and disobedient behavior, often directed at authority figures. Children with oppositional defiant disorder are stubborn, difficult, and disobedient without being physically aggressive or actually violating the rights of others.

ORC – Other Related Conditions

Osgood-Schlatter Disease – Inflammation of the bone and cartilage at the top of the shinbone (tibia). The cause is thought to be repetitive, excessive pulling by the tendon of the kneecap on its point of attachment at the top of the shinbone. The major symptoms are pain, swelling, and tenderness in the area.

OSHA – Occupational Safety and Health Administration

OSP – Office of Social Programs

Osteopetroses – A group of rare disorders that increase the density of bones, occurring when the body does not recycle old bone cells. Typical symptoms include impaired bone growth and thick bones that easily break.

OTC – Over The Counter

OTN – Offense Tracking Number

OTR – Occupational Therapist (Registered)

Outpatient – A patient who is receiving ambulatory care at a hospital or other facility without being admitted to the facility.

OVR – Office of Vocational Rehabilitation