T86.842 vs Z44
T86.842 (Corneal transplant infection) compared with Z44 (Encounter for fitting and adjustment of external prosthetic device), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. T86.842 carries an Excludes2 note covering Z44: “fitting and adjustment of external prosthetic device (Z44.-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| T86.842Corneal transplant infection | Z44Encounter for fitting and adjustment of external prosthetic device | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) | Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99) |
| Definition | Corneal transplant infection is a non-billable ICD-10-CM category code (T86.842). | Encounter for fitting and adjustment of external prosthetic device is a non-billable ICD-10-CM category code (Z44). |
| Includes | — | removal or replacement of external prosthetic device |
| Use additional code | code to specify infection code to identify other transplant complications, such as: graft-versus-host disease (D89.81-) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources