ICD-10-CM 2027
ICD-10 code for forearm corrosion
From the official ICD-10-CM alphabetic index entry “Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › forearm”. Page updated September 29, 2026.
About coding forearm corrosion
The ICD-10-CM code for forearm corrosion is T22.419 (Corrosion of unspecified degree of unspecified forearm). The official index lists 11 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T22.419.
Within T22.41, choose T22.419 (unspecified forearm) only when documentation doesn't support a more specific option: right forearm (T22.411) and left forearm (T22.412).
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 forearm corrosion codes (official index)
- first degree T22.519 — Corrosion of first degree of unspecified forearm
- left T22.412 — Corrosion of unspecified degree of left forearm
- first degree T22.512 — Corrosion of first degree of left forearm
- second degree T22.612 — Corrosion of second degree of left forearm
- third degree T22.712 — Corrosion of third degree of left forearm
- right T22.411 — Corrosion of unspecified degree of right forearm
- first degree T22.511 — Corrosion of first degree of right forearm
- second degree T22.611 — Corrosion of second degree of right forearm
- third degree T22.711 — Corrosion of third degree of right forearm
- second degree T22.619 — Corrosion of second degree of unspecified forearm
- third degree T22.719 — Corrosion of third degree of unspecified forearm
Common questions about forearm corrosion ICD-10 codes
What is the ICD-10 code for forearm corrosion?
- T22.419 — Corrosion of unspecified degree of unspecified forearm (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T22.519, T22.412, T22.512, T22.612 and others below.
What is the ICD-10 code for first degree forearm corrosion?
- T22.519 — Corrosion of first degree of unspecified forearm (header code; choose a more specific subcode).
What is the ICD-10 code for left forearm corrosion?
- T22.412 — Corrosion of unspecified degree of left forearm (header code; choose a more specific subcode).
What is the ICD-10 code for right forearm corrosion?
- T22.411 — Corrosion of unspecified degree of right forearm (header code; choose a more specific subcode).
What is the ICD-10 code for second degree forearm corrosion?
- T22.619 — Corrosion of second degree of unspecified forearm (header code; choose a more specific subcode).
What is the ICD-10 code for third degree forearm corrosion?
- T22.719 — Corrosion of third degree of unspecified forearm (header code; choose a more specific subcode).
Is T22.419 billable?
- No. T22.419 is a header code. Report one of its more specific subcodes instead.