ICD-10-CM > M00-M99 > M05-M14 > M12 > M12.4 > M12.47 M12.47 Intermittent hydrarthrosis, ankle and foot Non-Billable/Non-Specific Codes M12.471Intermittent hydrarthrosis, right ankle and footM12.472Intermittent hydrarthrosis, left ankle and footM12.479Intermittent hydrarthrosis, unspecified ankle and foot