ICD-10-CM > M00-M99 > M15-M19 > M19 > M19.0 > M19.07 M19.07 Primary osteoarthritis ankle and foot Non-Billable/Non-Specific Codes M19.071Primary osteoarthritis, right ankle and footM19.072Primary osteoarthritis, left ankle and footM19.079Primary osteoarthritis, unspecified ankle and foot