T33.99XS — Superficial frostbite of other sites, sequela
Is T33.99XS billable?
Yes — T33.99XS is billable for FY2027. T33.99XS is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T33.99XS may be submitted for encounters from October 1, 2026 through September 30, 2027.
T33.99XS at a glance
| Code | T33.99XS |
|---|---|
| Description | Superficial frostbite of other 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 T33.99XS?
In T33.99XS, the 7th character S means sequela. The 7th character is required for T33.99XS to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T33.99XS group to?
T33.99XS 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 T33.99XS listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T33.99, the nearest indexed parent of T33.99XS. Use them to find the family, then select the specific code.
- Frostbite › leg (superficial)
- Frostbite › specified site NEC (superficial)
- Frostbite › trunk (superficial)
- Frostbite › limb › lower (superficial)
Inclusion terms
Alternative wording in documentation that is classified to T33.99XS.
- Superficial frostbite of leg NOS
- Superficial frostbite of trunk NOS
Use additional code — inherited from Chapter 19
Report an additional code alongside T33.99XS to fully describe the condition. T33.99XS 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 T33.99XS, but a patient may have both at the same time. When documentation supports it, T33.99XS and the excluded code may both be reported.
Excludes2 — not included here — inherited from T33-T34
The conditions below are not part of T33.99XS, but a patient may have both at the same time. When documentation supports it, T33.99XS and the excluded code may both be reported.
How long has T33.99XS existed?
T33.99XS 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.