T86.840Corneal transplant rejection

T86.840 is the ICD-10-CM diagnosis code for corneal transplant rejection. It belongs to category T86 (complications of transplanted organs and tissue), block T80-T88 (complications of surgical and medical care, not elsewhere classified) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within T86.84 (complications of corneal transplant), T86.840 is specifically for corneal transplant rejection. Related codes cover corneal transplant failure (T86.841), corneal transplant infection (T86.842), other complications of corneal transplant (T86.848) and unspecified complication of corneal transplant (T86.849).

To report this condition, pick the subcode that matches the documentation: T86.8401 (right eye), T86.8402 (left eye), T86.8403 (bilateral) and T86.8409 (unspecified eye).

Use an additional code to identify other transplant complications, such as: graft-versus-host disease (D89.81-), malignancy associated with organ transplant (C80.2) and post-transplant lymphoproliferative disorders (PTLD) (D47.Z1).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2021 (expanded into subcodes).

Before ICD-10, this condition was coded in ICD-9-CM as 996.51 (mechanical complication due to corneal graft).