T20.511A — Corrosion of first degree of right ear [any part, except ear drum], initial encounter
Is T20.511A billable?
Yes — T20.511A is billable for FY2027. T20.511A is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T20.511A may be submitted for encounters from October 1, 2026 through September 30, 2027.
T20.511A at a glance
| Code | T20.511A |
|---|---|
| Description | Corrosion of first degree of right ear [any part, except ear drum], initial encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "A" | initial encounter |
What does the 7th character "A" mean in T20.511A?
In T20.511A, the 7th character A means initial encounter. The 7th character is required for T20.511A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T20.511A group to?
T20.511A sits in MDC 22 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 935Non-Extensive Burnsmedical
How is T20.511A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T20.51, the nearest indexed parent of T20.511A. Use them to find the family, then select the specific code.
- Corrosion › ear › first degree (injury) (acid) (caustic) (chemical) (lime) (external) (internal)
Code first — inherited from T20.5
The underlying condition below must be sequenced before T20.511A. T20.511A 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 T20.511A to fully describe the condition. T20.511A is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T20-T25
Report an additional code alongside T20.511A to fully describe the condition. T20.511A is sequenced first.
Use additional code — inherited from T20.5
Report an additional code alongside T20.511A to fully describe the condition. T20.511A is sequenced first.
- external cause code to identify place (Y92)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T20.511A, but a patient may have both at the same time. When documentation supports it, T20.511A and the excluded code may both be reported.
Excludes2 — not included here — inherited from T20
The conditions below are not part of T20.511A, but a patient may have both at the same time. When documentation supports it, T20.511A and the excluded code may both be reported.
Excludes2 — not included here — inherited from T20.51
The conditions below are not part of T20.511A, but a patient may have both at the same time. When documentation supports it, T20.511A and the excluded code may both be reported.
- corrosion of ear drum (T28.91-)
How long has T20.511A existed?
T20.511A 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.