ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.2 > S56.21 > S56.211 S56.211 Strain of other flexor muscle, fascia and tendon at forearm level, right arm Non-Billable/Non-Specific Codes S56.211A..., initial encounterS56.211D..., subsequent encounterS56.211S..., sequela