icd code for mild cognitive disorder
1 Non-Billable On/After Oct 1/2015. 2  Short description: Mild cognitive impairemt. 3  ICD-9-CM 331.83 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 331.83 should only be used for claims with a date of service on or before September 30, 2015.