T66 Radiation sickness, unspecified
ICD-10-CM category T66 sits in Chapter 20 (External causes of morbidity, V00-Y99). It contains 3 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Billable codes in T66
| Code | Description |
|---|---|
T66.XXXA | Radiation sickness, unspecified, initial encounter |
T66.XXXD | Radiation sickness, unspecified, subsequent encounter |
T66.XXXS | Radiation sickness, unspecified, sequela |
Search within ICD-10-CM for T66 and related codes
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