ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.8 > S66.81 > S66.819 S66.819 Strain of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand Non-Billable/Non-Specific Codes S66.819A..., initial encounterS66.819D..., subsequent encounterS66.819S..., sequela