T22.41 - Corrosion of unspecified degree of forearm T22.4 - Corrosion of unspecified degree of shoulder and upper limb, except wrist and hand T22.41 - Corrosion of unspecified degree of forearm T22.411 - Corrosion of unspecified degree of right forearm T22.412 - Corrosion of unspecified degree of left forearm T22.419 - Corrosion of unspecified degree of unspecified forearm