OHCA Policies and Rules
The ICD-9-CM diagnosis code for residential supports is 319 (mental retardation). This code must be entered in field 21 on the Form CMS-1500.
Disclaimer. The OHCA rules found on this Web site are unofficial. The official rules are published by the Oklahoma Secretary of State Office of Administrative Rules as Title 317 of the Oklahoma Administrative Code. To order an official copy of these rules, contact the Office of Administrative Rules at (405) 521-4911.