T20.419S

Corrosion of unspecified degree of unspecified ear [any part, except ear drum], sequela

Billable FY2026 2025-10-01 → 2026-09-30

This is the unspecified option. 2 more specific codes sit alongside it. Worth checking whether the documentation supports one of them.

Exclusions 5 never code together

T20code

Excludes2

burn and corrosion of ear drum (T28.41, T28.91)T28.41 T28.91
burn and corrosion of eye and adnexa (T26.-)T26.-
burn and corrosion of mouth and pharynx (T28.0)T28.0

S00-T88chapter

Excludes2

birth trauma (P10-P15)P10-P15
obstetric trauma (O70-O71)O70-O71

Excludes2 — not included here, but the patient may have both. Code both when documented.

7th character 3

A initial encounter

D subsequent encounter

S sequela this code

Instructional notes 5

T20.4code

Code first

(T51-T65) to identify chemical and intentT51-T65

Use additional code

external cause code to identify place (Y92)Y92

S00-T88chapter

Notes

Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

Use additional code

code to identify any retained foreign body, if applicable (Z18.-)Z18.-

Index entries leading here 1 filed at T20.41

The index files this at T20.41. The tabular extends it — laterality, staging, or the 7th character — so these entries lead to the family rather than to T20.419S exactly.

Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) T30.4
- ear (auricle) (external) (canal) T20.41

Alongside this code 2 same parent — T20.419

T20.419A Corrosion of unsp degree of unspecified ear, init encntr T20.419D Corrosion of unsp degree of unspecified ear, subs encntr

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Parent: T20.419
Block: T07-T88
Siblings: 2

Present FY2024–FY2027.