T28.9 — Corrosions of other and unspecified internal organs
Is T28.9 billable?
No — T28.9 is a non-billable header code. T28.9 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 15 billable codes beneath T28.9.
Billable codes under this header
- T28.90XACorrosions of unspecified internal organs, initial encounter
- T28.90XDCorrosions of unspecified internal organs, subsequent encounter
- T28.90XSCorrosions of unspecified internal organs, sequela
- T28.99XACorrosions of other internal organs, initial encounter
- T28.99XDCorrosions of other internal organs, subsequent encounter
- T28.99XSCorrosions of other internal organs, sequela
- T28.911ACorrosions of right ear drum, initial encounter
- T28.911DCorrosions of right ear drum, subsequent encounter
- T28.911SCorrosions of right ear drum, sequela
- T28.912ACorrosions of left ear drum, initial encounter
- T28.912DCorrosions of left ear drum, subsequent encounter
- T28.912SCorrosions of left ear drum, sequela
- T28.919ACorrosions of unspecified ear drum, initial encounter
- T28.919DCorrosions of unspecified ear drum, subsequent encounter
- T28.919SCorrosions of unspecified ear drum, sequela
T28.9 at a glance
| Code | T28.9 |
|---|---|
| Description | Corrosions of other and unspecified internal organs |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Code first
The underlying condition below must be sequenced before T28.9. T28.9 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 T28.9 to fully describe the condition. T28.9 is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T28
Report an additional code alongside T28.9 to fully describe the condition. T28.9 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T28.9, but a patient may have both at the same time. When documentation supports it, T28.9 and the excluded code may both be reported.
What codes fall under T28.9? (3)
How long has T28.9 existed?
T28.9 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.
What other codes are in the T28 family? (9)
- T28.0Burn of mouth and pharynxnot billable
- T28.1Burn of esophagusnot billable
- T28.2Burn of other parts of alimentary tractnot billable
- T28.3Burn of internal genitourinary organsnot billable
- T28.4Burns of other and unspecified internal organsnot billable
- T28.5Corrosion of mouth and pharynxnot billable
- T28.6Corrosion of esophagusnot billable
- T28.7Corrosion of other parts of alimentary tractnot billable
- T28.8Corrosion of internal genitourinary organsnot billable