Unspecified acquired deformity of left upper arm

This code signifies an acquired structural abnormality or malformation of the left upper arm that developed after birth, where the specific nature or cause of the deformity is not documented. It indicates a deviation from the normal anatomical shape or alignment of the humerus or surrounding soft tissues.

This code is appropriate when a patient presents with an acquired deformity of the left upper arm, but the provider documentation does not specify the exact type (e.g., valgus, varus, rotational) or the underlying cause (e.g., post-traumatic, post-surgical, degenerative). It should be used when more specific codes for acquired deformities are not supported by the clinical record.

• Avoid using this code if the documentation provides details about the specific type of deformity (e.g., M21.022 for valgus deformity).
• Ensure the documentation clearly states the deformity is "acquired" and not congenital; congenital deformities are coded differently.
• Always review the entire medical record for additional information that might allow for a more specific and accurate code assignment.