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T86.8491 ICD-10-CM Code: Unspecified complication of corneal transplant, right eye

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.

  • MS-DRG 919 — COMPLICATIONS OF TREATMENT WITH MCC (MDC 21)
  • MS-DRG 920 — COMPLICATIONS OF TREATMENT WITH CC (MDC 21)
  • MS-DRG 921 — COMPLICATIONS OF TREATMENT WITHOUT CC/MCC (MDC 21)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Official Registry Overview & Definition

Unspecified complication of corneal transplant, right eye is a billable ICD-10-CM diagnosis code (T86.8491).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for T86.8491 in the official ICD-10-CM tabular list.

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code to identify other transplant complications, such as:
  • graft-versus-host disease (D89.81-)
  • malignancy associated with organ transplant (C80.2)
  • post-transplant lymphoproliferative disorders (PTLD) (D47.Z1)
  • Use additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • Use additional code(s) to identify the specified condition resulting from the complication
  • Use additional code to identify devices involved and details of circumstances (Y62-Y82)

Frequently Compared Codes

The official Excludes notes on T86.8491 name these codes. Each comparison page covers when the two can — or must not — be reported together.

Change history

  • FY2021 — 2020-10-01
    Added to the code set
    Unspecified complication of corneal transplant, right eye
    FY2021 changes

Verify Before Coding

  • CC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Relationships & Classification

Official ICD-10-CM tabular notes on other codes that name T86.8491 or its code family.

1 Excludes1 notes: Z98.85 (via T86.-).

7 Excludes2 notes across 2 chapters: D89 (via T86.-), T81 (via T86.-), T82 (via T86.-), T83 (via T86.-), T84 (via T86.-), T85 (via T86.-), T85.3 (via T86.84.-).

4 Code First instructions across 2 chapters: C80.2 (via T86.-), D47.Z1 (via T86.-), D89.81 (via T86.-), D89.83 (via T86.-).

Potential MS-DRG Relationships (FY2026)

CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 12 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 3 MS-DRGs: DRG 919 (MDC 21), DRG 920 (MDC 21), DRG 921 (MDC 21).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):INJ036 — Complication of transplanted organs or tissue, initial encounter (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Contextual Map

Every relationship of T86.8491 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • S00-T88 — Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) (S00-T88) [Hierarchy]
  • T80-T88 — Complications of surgical and medical care, not elsewhere classified [Hierarchy]

Referenced by Excludes1 notes

  • Z98.85 — Transplanted organ removal status [Excludes1](via T86.-): “encounter for removal of transplanted organ -code to complication of transplanted organ (T86.-)” · check together

Referenced by Excludes2 notes

  • D89 — Other disorders involving the immune mechanism, not elsewhere classified [Excludes2](via T86.-): “transplant failure and rejection (T86.-)” · check together
  • T81 — Complications of procedures, not elsewhere classified [Excludes2](via T86.-): “complications of transplanted organs and tissue (T86.-)” · check together
  • T82 — Complications of cardiac and vascular prosthetic devices, implants and grafts [Excludes2](via T86.-): “failure and rejection of transplanted organs and tissue (T86.-)” · check together
  • T83 — Complications of genitourinary prosthetic devices, implants and grafts [Excludes2](via T86.-): “failure and rejection of transplanted organs and tissue (T86.-)” · check together
  • T84 — Complications of internal orthopedic prosthetic devices, implants and grafts [Excludes2](via T86.-): “failure and rejection of transplanted organs and tissues (T86.-)” · check together
  • T85 — Complications of other internal prosthetic devices, implants and grafts [Excludes2](via T86.-): “failure and rejection of transplanted organs and tissue (T86.-)” · check together
  • T85.3 — Mechanical complication of other ocular prosthetic devices, implants and grafts [Excludes2](via T86.84.-): “other complications of corneal graft (T86.84-)” · check together

Referenced by Code First instructions

  • C80.2 — Malignant neoplasm associated with transplanted organ [Code First](via T86.-): “complication of transplanted organ (T86.-)” · check together
  • D47.Z1 — Post-transplant lymphoproliferative disorder (PTLD) [Code First](via T86.-): “complications of transplanted organs and tissue (T86.-)” · check together
  • D89.81 — Graft-versus-host disease [Code First](via T86.-): “complications of transplanted organs and tissue (T86.-)” · check together
  • D89.83 — Cytokine release syndrome [Code First](via T86.-): “complications of transplanted organs and tissue (T86.-)” · check together

Clinical classification (CCSR)

  • INJ036 — Complication of transplanted organs or tissue, initial encounter [CCSR]

Potential MS-DRG

  • CC — Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (CC).”
  • DRG 919 — COMPLICATIONS OF TREATMENT WITH MCC [MS-DRG]: “COMPLICATIONS OF TREATMENT WITH MCC (MDC 21)”
  • DRG 920 — COMPLICATIONS OF TREATMENT WITH CC [MS-DRG]: “COMPLICATIONS OF TREATMENT WITH CC (MDC 21)”
  • DRG 921 — COMPLICATIONS OF TREATMENT WITHOUT CC/MCC [MS-DRG]: “COMPLICATIONS OF TREATMENT WITHOUT CC/MCC (MDC 21)”

MDC crossing · procedures (32029)

  • MDC 21 — Injuries, Poisonings and Toxic Effects of Drugs [MDC crossing]: “Injuries, Poisonings and Toxic Effects of Drugs — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”
  • 0016070 — Bypass Cerebral Ventricle to Nasopharynx with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Nasopharynx with Autologous Tissue Substitute, Open Approach — grouped in MDC 21, the procedure side of this code's crossing.” · check together
  • 0016071 — Bypass Cerebral Ventricle to Mastoid Sinus with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Mastoid Sinus with Autologous Tissue Substitute, Open Approach — grouped in MDC 21, the procedure side of this code's crossing.” · check together
  • 0016072 — Bypass Cerebral Ventricle to Atrium with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Atrium with Autologous Tissue Substitute, Open Approach — grouped in MDC 21, the procedure side of this code's crossing.” · check together
  • 0016073 — Bypass Cerebral Ventricle to Blood Vessel with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Blood Vessel with Autologous Tissue Substitute, Open Approach — grouped in MDC 21, the procedure side of this code's crossing.” · check together
  • 0016074 — Bypass Cerebral Ventricle to Pleural Cavity with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Pleural Cavity with Autologous Tissue Substitute, Open Approach — grouped in MDC 21, the procedure side of this code's crossing.” · check together
  • and 32024 more

Nearest codes (40)

  • T86 — Complications of transplanted organs and tissue [Sibling]
  • T86.8401 — Corneal transplant rejection, right eye [Sibling]
  • T86.8402 — Corneal transplant rejection, left eye [Sibling]
  • T86.8403 — Corneal transplant rejection, bilateral [Sibling]
  • T86.8409 — Corneal transplant rejection, unspecified eye [Sibling]
  • T86.841 — Corneal transplant failure [Sibling]
  • T86.8411 — Corneal transplant failure, right eye [Sibling]
  • T86.8412 — Corneal transplant failure, left eye [Sibling]
  • and 32 more

Change history

  • FY2021 — Added to the code set [Change history]

Nearest Codes in This Family

Official ICD-10-CM classifications closest to T86.8491 in its code family, with their registry titles.

  • T86.8481 — Other complications of corneal transplant, right eye
  • T86.8482 — Other complications of corneal transplant, left eye
  • T86.8483 — Other complications of corneal transplant, bilateral
  • T86.8489 — Other complications of corneal transplant, unspecified eye
  • T86.849 — Unspecified complication of corneal transplant
  • T86.8492 — Unspecified complication of corneal transplant, left eye
  • T86.8493 — Unspecified complication of corneal transplant, bilateral
  • T86.8499 — Unspecified complication of corneal transplant, unspecified eye
  • T86.85 — Complication of intestine transplant
  • T86.850 — Intestine transplant rejection

View all codes in the T86 family