ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.0 S56.0 Injury of flexor muscle, fascia and tendon of thumb at forearm level Non-Billable/Non-Specific Codes S56.00Unspecified injury of flexor muscle, fascia and tendon of thumb at forearm levelS56.001Unspecified injury of flexor muscle, fascia and tendon of right thumb at forearm levelS56.001A..., initial encounterS56.001D..., subsequent encounterS56.001S..., sequelaS56.002Unspecified injury of flexor muscle, fascia and tendon of left thumb at forearm levelS56.002A..., initial encounterS56.002D..., subsequent encounterS56.002S..., sequelaS56.009Unspecified injury of flexor muscle, fascia and tendon of unspecified thumb at forearm levelS56.009A..., initial encounterS56.009D..., subsequent encounterS56.009S..., sequelaS56.01Strain of flexor muscle, fascia and tendon of thumb at forearm levelS56.011Strain of flexor muscle, fascia and tendon of right thumb at forearm levelS56.011A..., initial encounterS56.011D..., subsequent encounterS56.011S..., sequelaS56.012Strain of flexor muscle, fascia and tendon of left thumb at forearm levelS56.012A..., initial encounterS56.012D..., subsequent encounterS56.012S..., sequelaS56.019Strain of flexor muscle, fascia and tendon of unspecified thumb at forearm levelS56.019A..., initial encounterS56.019D..., subsequent encounterS56.019S..., sequelaS56.02Laceration of flexor muscle, fascia and tendon of thumb at forearm levelS56.021Laceration of flexor muscle, fascia and tendon of right thumb at forearm levelS56.021A..., initial encounterS56.021D..., subsequent encounterS56.021S..., sequelaS56.022Laceration of flexor muscle, fascia and tendon of left thumb at forearm levelS56.022A..., initial encounterS56.022D..., subsequent encounterS56.022S..., sequelaS56.029Laceration of flexor muscle, fascia and tendon of unspecified thumb at forearm levelS56.029A..., initial encounterS56.029D..., subsequent encounterS56.029S..., sequelaS56.09Other injury of flexor muscle, fascia and tendon of thumb at forearm levelS56.091Other injury of flexor muscle, fascia and tendon of right thumb at forearm levelS56.091A..., initial encounterS56.091D..., subsequent encounterS56.091S..., sequelaS56.092Other injury of flexor muscle, fascia and tendon of left thumb at forearm levelS56.092A..., initial encounterS56.092D..., subsequent encounterS56.092S..., sequelaS56.099Other injury of flexor muscle, fascia and tendon of unspecified thumb at forearm levelS56.099A..., initial encounterS56.099D..., subsequent encounterS56.099S..., sequela