T28.912S

Corrosions of left ear drum, sequela

Billable code

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

Inherited from T28.9Corrosions of other and unspecified internal organs

Code first

(T51-T65) to identify chemical and intent

Inherited from T28Burn and corrosion of other internal organs

Use additional

external cause code to identify the source and intent of the burn (X00-X19, X75-X77, X96-X98) external cause code to identify place (Y92)

7th character

The appropriate 7th character is to be added to each code from category T28

Valid 7th characters and their meanings
Character	Meaning
A	initial encounter
D	subsequent encounter
S	sequela

Inherited from chapter 19Injury, poisoning and certain other consequences of external causes

Excludes 2

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

Use additional

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

Note

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. (T07-T88) Injury, poisoning and certain other consequences of external causes (T07-T88) (T20-T32) Burns and corrosions (T20-T32) Includes: burns (thermal) from electrical heating appliances burns (thermal) from electricity burns (thermal) from flame burns (thermal) from friction burns (thermal) from hot air and hot gases burns (thermal) from hot objects burns (thermal) from lightning burns (thermal) from radiation chemical burn [corrosion] (external) (internal) scalds Excludes2: erythema [dermatitis] ab igne (L59.0) radiation-related disorders of the skin and subcutaneous tissue (L55-L59) sunburn (L55.-)

Official Guidelines for T28.912S

FY 2026 ›

I.C.19Chapter-specific guidanceChapter 19: Injury, poisoning, and certain other consequences of external causes (S00-T88)

Subsections

Sections that reference T28.912S

I.C.19.dCoding of Burns and Corrosions
… Burns of the eye and internal organs (T26-T28) are classified by site, but not by degree.

Sections whose FY 2026 text names T28.912S, its T28 category, or a range containing it — the chapter guidance above is the authoritative source.