Non-Billable / Non-Specific Code
ICD-10-CM T86.840 is the diagnosis code for Corneal transplant rejection. This code falls under the section "Complications of surgical and medical care, not elsewhere classified" within Chapter 19 — Injury, poisoning and certain other consequences of external causes (S00-T88). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where T86.840 sits in the ICD-10-CM classification helps ensure proper coding:
No, T86.840 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
T86.840 is the ICD-10-CM diagnosis code for "Corneal transplant rejection". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of T86.840 is T86.84 ("Complications of corneal transplant"). T86.840 provides a more specific classification within this category.
T86.840 is located in Section T80-T88 — "Complications of surgical and medical care, not elsewhere classified" within Chapter 19 of the ICD-10-CM Tabular List.
T86.840 has 4 sub-code(s) that provide more specific detail: T86.8401, T86.8402, T86.8403, T86.8409.
Use T86.840 when the patients documented diagnosis matches "Corneal transplant rejection" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Corneal transplant rejection is T86.840.
No, T86.840 is non-billable. Use a more specific sub-code for primary diagnosis billing.
T86.840 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, T86.840 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.