Main Office Phone: 248.858.1210 Non-emergency Service Access Phone: 248.464.6363 Customer Services Phone: 888.847.0513 Mailing Address: 5505 Corporate Dr. Troy, MI 48098 If you are contacting Customer Services outside of regular business hours, please let us know the best day and time to get back with you. For urgent matters, please contact the Crisis and Resource Helpline 800-231-1127. For more information about available public mental health services through OCHN, please visit www.oaklandchn.org. OCHN does not exclude people or treat them differently because of race, color, national origin, age, disability, or sex.