ICD-10-CM > M00-M99 > M65-M67 > M65 > M65.2 > M65.23 M65.23 Calcific tendinitis, forearm Non-Billable/Non-Specific Codes M65.231Calcific tendinitis, right forearmM65.232Calcific tendinitis, left forearmM65.239Calcific tendinitis, unspecified forearm