ICD-10-CM > M00-M99 > M70-M79 > M76 > M76.6 M76.6 Achilles tendinitis Non-Billable/Non-Specific Applicable To Achilles bursitis Codes M76.60Achilles tendinitis, unspecified legM76.61Achilles tendinitis, right legM76.62Achilles tendinitis, left leg