T20.512D — Corrosion of first degree of left ear [any part, except ear drum], subsequent encounter
Is T20.512D billable?
Yes — T20.512D is billable for FY2027. T20.512D is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T20.512D may be submitted for encounters from October 1, 2026 through September 30, 2027.
T20.512D at a glance
| Code | T20.512D |
|---|---|
| Description | Corrosion of first degree of left ear [any part, except ear drum], subsequent encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "D" | subsequent encounter |
What does the 7th character "D" mean in T20.512D?
In T20.512D, the 7th character D means subsequent encounter. The 7th character is required for T20.512D to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T20.512D group to?
T20.512D sits in MDC 23 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.
- 949Aftercare with CC/MCCmedical
- 950Aftercare without CC/MCCmedical
How is T20.512D listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T20.51, the nearest indexed parent of T20.512D. 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 T20.512D. T20.512D 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 T20.512D to fully describe the condition. T20.512D 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 T20.512D to fully describe the condition. T20.512D is sequenced first.
Use additional code — inherited from T20.5
Report an additional code alongside T20.512D to fully describe the condition. T20.512D 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 T20.512D, but a patient may have both at the same time. When documentation supports it, T20.512D and the excluded code may both be reported.
Excludes2 — not included here — inherited from T20
The conditions below are not part of T20.512D, but a patient may have both at the same time. When documentation supports it, T20.512D and the excluded code may both be reported.
Excludes2 — not included here — inherited from T20.51
The conditions below are not part of T20.512D, but a patient may have both at the same time. When documentation supports it, T20.512D and the excluded code may both be reported.
- corrosion of ear drum (T28.91-)
How long has T20.512D existed?
T20.512D 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.