ICD-10-CM > S00-T88 > S80-S89 > S86 > S86.0 > S86.00 > S86.009 S86.009 Unspecified injury of unspecified Achilles tendon Non-Billable/Non-Specific Codes S86.009A..., initial encounterS86.009D..., subsequent encounterS86.009S..., sequela