L59 vs T67
L59 (Other disorders of skin and subcutaneous tissue related to radiation) compared with T67 (Effects of heat and light), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. T67 carries an Excludes1 note covering L59: “radiation-related disorders of the skin and subcutaneous tissue (L55-L59)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| L59Other disorders of skin and subcutaneous tissue related to radiation | T67Effects of heat and light | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header Report instead: T67.01XA, T67.01XD, T67.01XS, T67.02XA, T67.02XD |
| Classification | L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Other disorders of skin and subcutaneous tissue related to radiation is a non-billable ICD-10-CM category code (L59). | Effects of heat and light is a non-billable ICD-10-CM category code (T67). |
| 7th character | — | The appropriate 7th character is to be added to each code from category T67 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources