Q: I have a question about coding transplant complications. My understanding is if the complication affects the transplanted organ, then coders should assign a code for the transplant complication itself. Is this correct? Consider the following physician documentation: Final A/P: Acute renal failure in patient with history of renal transplant. Should coders report 996.81 (complications of transplanted kidney) and 584.9 (acute kidney failure, unspecified)? Also consider this documentation: CHF in heart transplant patient . Should coders report 996.83 (complications of transplanted heart) and 428.0 (CHF, unspecified)?