Ovarian dysfunction NOS. Is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 256.9. You are viewing the 2011 version of ICD-9-CM 256.9. More recent version(s) of ICD-9-CM 256.9. 2015/16 ICD-10-CM E28.9. Ovarian dysfunction, unspecifie...