ICD-10-CM 2027
ICD-10 code for hand s corrosion
Corrosion of unspecified degree of unspecified hand, unspecified site
From the official ICD-10-CM alphabetic index entry “Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › hand (s)”. Page updated September 29, 2026.
About coding hand s corrosion
The ICD-10-CM code for hand s corrosion is T23.409 (Corrosion of unspecified degree of unspecified hand, unspecified site). The official index lists 23 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T23.409.
Within T23.40, choose T23.409 (unspecified hand, unspecified site) only when documentation doesn't support a more specific option: right hand, unspecified site (T23.401) and left hand, unspecified site (T23.402).
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 hand s corrosion codes (official index)
- back
- finger
- first degree T23.509 — Corrosion of first degree of unspecified hand, unspecified site
- left T23.402 — Corrosion of unspecified degree of left hand, unspecified site
- first degree T23.502 — Corrosion of first degree of left hand, unspecified site
- second degree T23.602 — Corrosion of second degree of left hand, unspecified site
- third degree T23.702 — Corrosion of third degree of left hand, unspecified site
- multiple sites with wrist T23.499 — Corrosion of unspecified degree of multiple sites of unspecified wrist and hand
- first degree T23.599 — Corrosion of first degree of multiple sites of unspecified wrist and hand
- left T23.492 — Corrosion of unspecified degree of multiple sites of left wrist and hand
- first degree T23.592 — Corrosion of first degree of multiple sites of left wrist and hand
- second degree T23.692 — Corrosion of second degree of multiple sites of left wrist and hand
- third degree T23.792 — Corrosion of third degree of multiple sites of left wrist and hand
- right T23.491 — Corrosion of unspecified degree of multiple sites of right wrist and hand
- first degree T23.591 — Corrosion of first degree of multiple sites of right wrist and hand
- second degree T23.691 — Corrosion of second degree of multiple sites of right wrist and hand
- third degree T23.791 — Corrosion of third degree of multiple sites of right wrist and hand
- second degree T23.699 — Corrosion of second degree of multiple sites of unspecified wrist and hand
- third degree T23.799 — Corrosion of third degree of multiple sites of unspecified wrist and hand
- palm
- right T23.401 — Corrosion of unspecified degree of right hand, unspecified site
- first degree T23.501 — Corrosion of first degree of right hand, unspecified site
- second degree T23.601 — Corrosion of second degree of right hand, unspecified site
- third degree T23.701 — Corrosion of third degree of right hand, unspecified site
- second degree T23.609 — Corrosion of second degree of unspecified hand, unspecified site
- third degree T23.709 — Corrosion of third degree of unspecified hand, unspecified site
- thumb
Common questions about hand s corrosion ICD-10 codes
What is the ICD-10 code for hand s corrosion?
- T23.409 — Corrosion of unspecified degree of unspecified hand, unspecified site (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T23.509, T23.402, T23.502, T23.602 and others below.
What is the ICD-10 code for first degree hand s corrosion?
- T23.509 — Corrosion of first degree of unspecified hand, unspecified site (header code; choose a more specific subcode).
What is the ICD-10 code for left hand s corrosion?
- T23.402 — Corrosion of unspecified degree of left hand, unspecified site (header code; choose a more specific subcode).
What is the ICD-10 code for multiple sites with wrist hand s corrosion?
- T23.499 — Corrosion of unspecified degree of multiple sites of unspecified wrist and hand (header code; choose a more specific subcode).
What is the ICD-10 code for right hand s corrosion?
- T23.401 — Corrosion of unspecified degree of right hand, unspecified site (header code; choose a more specific subcode).
What is the ICD-10 code for second degree hand s corrosion?
- T23.609 — Corrosion of second degree of unspecified hand, unspecified site (header code; choose a more specific subcode).
What is the ICD-10 code for third degree hand s corrosion?
- T23.709 — Corrosion of third degree of unspecified hand, unspecified site (header code; choose a more specific subcode).
Is T23.409 billable?
- No. T23.409 is a header code. Report one of its more specific subcodes instead.