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ICD-10-CM 2027

ICD-10 code for upper limb corrosion

T22.40

Corrosion of unspecified degree of shoulder and upper limb, except wrist and hand, unspecified site

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › upper limb (axilla) (scapular region)”. Page updated September 29, 2026.

About coding upper limb corrosion

The ICD-10-CM code for upper limb corrosion is T22.40 (Corrosion of unspecified degree of shoulder and upper limb, except wrist and hand, unspecified site). The official index lists 15 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T22.40.

Within T22.4, choose T22.40 (unspecified site) only when documentation doesn't support a more specific option: forearm (T22.41), elbow (T22.42), upper arm (T22.43), axilla (T22.44), shoulder (T22.45), scapular region (T22.46) and multiple sites of shoulder and upper limb, except wrist and hand (T22.49).

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 upper limb corrosion codes (official index)

  • above elbow
  • axilla
  • elbow
  • first degree T22.50 — Corrosion of first degree of shoulder and upper limb, except wrist and hand unspecified site
  • forearm
  • hand
  • interscapular region
  • multiple sites T22.499 — Corrosion of unspecified degree of multiple sites of unspecified shoulder and upper limb, except wrist and hand
  • first degree T22.599 — Corrosion of first degree of multiple sites of unspecified shoulder and upper limb, except wrist and hand
  • left T22.492 — Corrosion of unspecified degree of multiple sites of left shoulder and upper limb, except wrist and hand
  • first degree T22.592 — Corrosion of first degree of multiple sites of left shoulder and upper limb, except wrist and hand
  • second degree T22.692 — Corrosion of second degree of multiple sites of left shoulder and upper limb, except wrist and hand
  • third degree T22.792 — Corrosion of third degree of multiple sites of left shoulder and upper limb, except wrist and hand
  • right T22.491 — Corrosion of unspecified degree of multiple sites of right shoulder and upper limb, except wrist and hand
  • first degree T22.591 — Corrosion of first degree of multiple sites of right shoulder and upper limb, except wrist and hand
  • second degree T22.691 — Corrosion of second degree of multiple sites of right shoulder and upper limb, except wrist and hand
  • third degree T22.791 — Corrosion of third degree of multiple sites of right shoulder and upper limb, except wrist and hand
  • second degree T22.699 — Corrosion of second degree of multiple sites of unspecified shoulder and upper limb, except wrist and hand
  • third degree T22.799 — Corrosion of third degree of multiple sites of unspecified shoulder and upper limb, except wrist and hand
  • scapular region
  • second degree T22.60 — Corrosion of second degree of shoulder and upper limb, except wrist and hand, unspecified site
  • shoulder
  • third degree T22.70 — Corrosion of third degree of shoulder and upper limb, except wrist and hand, unspecified site
  • wrist

Common questions about upper limb corrosion ICD-10 codes

What is the ICD-10 code for upper limb corrosion?

T22.40 — Corrosion of unspecified degree of shoulder and upper limb, except wrist and hand, unspecified site (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T22.50, T22.499, T22.599, T22.492 and others below.

What is the ICD-10 code for first degree upper limb corrosion?

T22.50 — Corrosion of first degree of shoulder and upper limb, except wrist and hand unspecified site (header code; choose a more specific subcode).

What is the ICD-10 code for multiple sites upper limb corrosion?

T22.499 — Corrosion of unspecified degree of multiple sites of unspecified shoulder and upper limb, except wrist and hand (header code; choose a more specific subcode).

What is the ICD-10 code for second degree upper limb corrosion?

T22.60 — Corrosion of second degree of shoulder and upper limb, except wrist and hand, unspecified site (header code; choose a more specific subcode).

What is the ICD-10 code for third degree upper limb corrosion?

T22.70 — Corrosion of third degree of shoulder and upper limb, except wrist and hand, unspecified site (header code; choose a more specific subcode).

Is T22.40 billable?

No. T22.40 is a header code. Report one of its more specific subcodes instead.