Other diphtheritic complications

This code represents various complications arising from diphtheria that are not specifically classified elsewhere. These complications can affect multiple organ systems, such as the heart (e.g., myocarditis), nervous system (e.g., paralysis), or kidneys. It signifies a sequela or adverse effect directly attributable to a diphtheria infection.

Use this code when the patient presents with a documented complication of diphtheria that is not precisely defined by a more specific ICD-10-CM code. Documentation should clearly link the complication to a previous or current diphtheria infection and rule out other potential etiologies. Examples include diphtheritic polyneuropathy or renal involvement not otherwise specified.

• Always sequence the diphtheria infection code (A36.xx) first, followed by this code for the complication, if the diphtheria is still active.
• Ensure the medical record explicitly states the complication is due to diphtheria; avoid assumptions.
• Differentiate from post-diphtheria conditions that may have their own specific codes if they are not considered direct complications.