S56.21 - Strain of other flexor muscle, fascia and tendon at forearm level S56.2 - Injury of other flexor muscle, fascia and tendon at forearm level S56.21 - Strain of other flexor muscle, fascia and tendon at forearm level S56.211 - Strain of other flexor muscle, fascia and tendon at forearm level, right arm S56.212 - Strain of other flexor muscle, fascia and tendon at forearm level, left arm S56.219 - Strain of other flexor muscle, fascia and tendon at forearm level, unspecified arm