ICD-10-CM > Z00-Z99 > Z77-Z99 > Z79 > Z79.8 > Z79.89 > Z79.891 Z79.891 Long term (current) use of opiate analgesic Billable/Specific Copy Code Copy Description Applicable To Long term (current) use of methadone for pain management Type 2 Excludes methadone use NOS (F11.9-)use of methadone for treatment of heroin addiction (F11.2-)