ICD-10-CM 2027
ICD-10 code for internal organ s corrosion
From the official ICD-10-CM alphabetic index entry “Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › internal organ (s)”. Page updated September 29, 2026.
About coding internal organ s corrosion
The ICD-10-CM code for internal organ s corrosion is T28.90 (Corrosions of unspecified internal organs). The official index lists 7 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T28.90.
Within T28.9, choose T28.90 (unspecified internal organs) only when documentation doesn't support a more specific option: ear drum (T28.91) and other internal organs (T28.99).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
Use an additional code for: external cause code to identify the source and intent of the burn (X00-X19, X75-X77, X96-X98) and external cause code to identify place (Y92).
More specific internal organ s corrosion codes (official index)
- alimentary tract T28.7 — Corrosion of other parts of alimentary tract
- esophagus T28.6 — Corrosion of esophagus
- esophagus T28.6 — Corrosion of esophagus
- genitourinary T28.8 — Corrosion of internal genitourinary organs
- mouth T28.5 — Corrosion of mouth and pharynx
- pharynx T28.5 — Corrosion of mouth and pharynx
- specified organ NEC T28.99 — Corrosions of other internal organs
Common questions about internal organ s corrosion ICD-10 codes
What is the ICD-10 code for internal organ s corrosion?
- T28.90 — Corrosions of unspecified internal organs (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T28.7, T28.6, T28.6, T28.8 and others below.
What is the ICD-10 code for alimentary tract internal organ s corrosion?
- T28.7 — Corrosion of other parts of alimentary tract (header code; choose a more specific subcode).
What is the ICD-10 code for esophagus internal organ s corrosion?
- T28.6 — Corrosion of esophagus (header code; choose a more specific subcode).
What is the ICD-10 code for genitourinary internal organ s corrosion?
- T28.8 — Corrosion of internal genitourinary organs (header code; choose a more specific subcode).
What is the ICD-10 code for mouth internal organ s corrosion?
- T28.5 — Corrosion of mouth and pharynx (header code; choose a more specific subcode).
What is the ICD-10 code for pharynx internal organ s corrosion?
- T28.5 — Corrosion of mouth and pharynx (header code; choose a more specific subcode).
Is T28.90 billable?
- No. T28.90 is a header code. Report one of its more specific subcodes instead.