ICD-10-CM > M00-M99 > M86-M90 > M89 > M89.4 > M89.47 M89.47 Other hypertrophic osteoarthropathy, ankle and foot Non-Billable/Non-Specific Codes M89.471Other hypertrophic osteoarthropathy, right ankle and footM89.472Other hypertrophic osteoarthropathy, left ankle and footM89.479Other hypertrophic osteoarthropathy, unspecified ankle and foot