ICD-10-CM > M00-M99 > M15-M19 > M19 > M19.1 > M19.17 M19.17 Post-traumatic osteoarthritis, ankle and foot Non-Billable/Non-Specific Codes M19.171Post-traumatic osteoarthritis, right ankle and footM19.172Post-traumatic osteoarthritis, left ankle and footM19.179Post-traumatic osteoarthritis, unspecified ankle and foot