T27.5XXS — Corrosion involving larynx and trachea with lung, sequela
Is T27.5XXS billable?
Yes — T27.5XXS is billable for FY2027. T27.5XXS is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T27.5XXS may be submitted for encounters from October 1, 2026 through September 30, 2027.
T27.5XXS at a glance
| Code | T27.5XXS |
|---|---|
| Description | Corrosion involving larynx and trachea with lung, 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 T27.5XXS?
In T27.5XXS, the 7th character S means sequela. The 7th character is required for T27.5XXS to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T27.5XXS group to?
T27.5XXS sits in MDC 09 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.
- 604Trauma to the Skin, Subcutaneous Tissue and Breast with MCCmedical
- 605Trauma to the Skin, Subcutaneous Tissue and Breast without MCCmedical
How is T27.5XXS listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T27.5, the nearest indexed parent of T27.5XXS. Use them to find the family, then select the specific code.
- Corrosion › lung (injury) (acid) (caustic) (chemical) (lime) (external) (internal)
- Corrosion › larynx › with lung (injury) (acid) (caustic) (chemical) (lime) (external) (internal)
- Corrosion › trachea › with lung (injury) (acid) (caustic) (chemical) (lime) (external) (internal)
Code first
The underlying condition below must be sequenced before T27.5XXS. T27.5XXS describes a manifestation and cannot be the principal or first-listed diagnosis.
- (T51-T65) to identify chemical and intent
Code first — inherited from T27.5
The underlying condition below must be sequenced before T27.5XXS. T27.5XXS describes a manifestation and cannot be the principal or first-listed diagnosis.
- (T51-T65) to identify chemical and intent
Use additional code — inherited from Chapter 19
Report an additional code alongside T27.5XXS to fully describe the condition. T27.5XXS is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T27
Report an additional code alongside T27.5XXS to fully describe the condition. T27.5XXS is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T27.5XXS, but a patient may have both at the same time. When documentation supports it, T27.5XXS and the excluded code may both be reported.
How long has T27.5XXS existed?
T27.5XXS 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.