T86.99Other complications of unspecified transplanted organ and tissue

T86.99 is the ICD-10-CM diagnosis code for other complications of unspecified transplanted organ and tissue. 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 billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within T86.9, choose T86.99 (Other complications of unspecified transplanted organ and tissue) only when documentation doesn't support a more specific option: unspecified complication of unspecified transplanted organ and tissue (T86.90), unspecified transplanted organ and tissue rejection (T86.91), unspecified transplanted organ and tissue failure (T86.92) and unspecified transplanted organ and tissue infection (T86.93).

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).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 919 (Complications of Treatment with MCC, relative weight 1.763), DRG 920 (Complications of Treatment with CC, relative weight 0.9975) and DRG 921 (Complications of Treatment without CC/MCC, relative weight 0.6722), in MDC 21 (Injuries, Poisonings and Toxic Effects of Drugs), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 996.80 (complications of transplanted organ, unspecified).