T33.90XS — Superficial frostbite of unspecified sites, sequela
Is T33.90XS billable?
Yes, but T33.90XS is an unspecified code. T33.90XS is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, T33.90XS is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting T33.90XS — the more specific alternatives are listed below.
More specific alternatives
- T33.02XSSuperficial frostbite of nose, sequela
- T33.1XXSSuperficial frostbite of neck, sequela
- T33.2XXSSuperficial frostbite of thorax, sequela
- T33.3XXSSuperficial frostbite of abdominal wall, lower back and pelvis, sequela
- T33.40XSSuperficial frostbite of unspecified arm, sequela
- T33.511SSuperficial frostbite of right wrist, sequela
- T33.60XSSuperficial frostbite of unspecified hip and thigh, sequela
- T33.70XSSuperficial frostbite of unspecified knee and lower leg, sequela
- T33.811SSuperficial frostbite of right ankle, sequela
T33.90XS at a glance
| Code | T33.90XS |
|---|---|
| Description | Superficial frostbite of unspecified sites, sequela |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "S" | sequela |
What does the 7th character "S" mean in T33.90XS?
In T33.90XS, the 7th character S means sequela. The 7th character is required for T33.90XS to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T33.90XS group to?
T33.90XS sits in MDC 21 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 922Other Injury, Poisoning and Toxic Effect Diagnoses with MCCmedical
- 923Other Injury, Poisoning and Toxic Effect Diagnoses without MCCmedical
How is T33.90XS listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T33.90, the nearest indexed parent of T33.90XS. Use them to find the family, then select the specific code.
- Frostbite (superficial)
Inclusion terms
Alternative wording in documentation that is classified to T33.90XS.
- Superficial frostbite NOS
Use additional code — inherited from Chapter 19
Report an additional code alongside T33.90XS to fully describe the condition. T33.90XS is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T33.90XS, but a patient may have both at the same time. When documentation supports it, T33.90XS and the excluded code may both be reported.
Excludes2 — not included here — inherited from T33-T34
The conditions below are not part of T33.90XS, but a patient may have both at the same time. When documentation supports it, T33.90XS and the excluded code may both be reported.
How long has T33.90XS existed?
T33.90XS has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.