ICD-10-CM 2027
ICD-10 code for knee corrosion
From the official ICD-10-CM alphabetic index entry “Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › knee”. Page updated September 29, 2026.
About coding knee corrosion
The ICD-10-CM code for knee corrosion is T24.429 (Corrosion of unspecified degree of unspecified knee). The official index lists 11 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T24.429.
Within T24.42, choose T24.429 (unspecified knee) only when documentation doesn't support a more specific option: right knee (T24.421) and left knee (T24.422).
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.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific knee corrosion codes (official index)
- first degree T24.529 — Corrosion of first degree of unspecified knee
- left T24.422 — Corrosion of unspecified degree of left knee
- first degree T24.522 — Corrosion of first degree of left knee
- second degree T24.622 — Corrosion of second degree of left knee
- third degree T24.722 — Corrosion of third degree of left knee
- right T24.421 — Corrosion of unspecified degree of right knee
- first degree T24.521 — Corrosion of first degree of right knee
- second degree T24.621 — Corrosion of second degree of right knee
- third degree T24.721 — Corrosion of third degree of right knee
- second degree T24.629 — Corrosion of second degree of unspecified knee
- third degree T24.729 — Corrosion of third degree of unspecified knee
Common questions about knee corrosion ICD-10 codes
What is the ICD-10 code for knee corrosion?
- T24.429 — Corrosion of unspecified degree of unspecified knee (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T24.529, T24.422, T24.522, T24.622 and others below.
What is the ICD-10 code for first degree knee corrosion?
- T24.529 — Corrosion of first degree of unspecified knee (header code; choose a more specific subcode).
What is the ICD-10 code for left knee corrosion?
- T24.422 — Corrosion of unspecified degree of left knee (header code; choose a more specific subcode).
What is the ICD-10 code for right knee corrosion?
- T24.421 — Corrosion of unspecified degree of right knee (header code; choose a more specific subcode).
What is the ICD-10 code for second degree knee corrosion?
- T24.629 — Corrosion of second degree of unspecified knee (header code; choose a more specific subcode).
What is the ICD-10 code for third degree knee corrosion?
- T24.729 — Corrosion of third degree of unspecified knee (header code; choose a more specific subcode).
Is T24.429 billable?
- No. T24.429 is a header code. Report one of its more specific subcodes instead.