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ICD-10-CM 2027

ICD-10 code for neck corrosion

T20.47

Corrosion of unspecified degree of neck

Header — needs a more specific code

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

About coding neck corrosion

The ICD-10-CM code for neck corrosion is T20.47 (Corrosion of unspecified degree of neck). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T20.47.

Within T20.4 (corrosion of unspecified degree of head, face, and neck), T20.47 is specifically for corrosion of unspecified degree of neck. Related codes cover unspecified site (T20.40), ear [any part, except ear drum] (T20.41), lip(s) (T20.42), chin (T20.43), nose (septum) (T20.44), scalp [any part] (T20.45), forehead and cheek (T20.46) and multiple sites of head, face, and neck (T20.49).

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 neck corrosion codes (official index)

  • first degree T20.57 — Corrosion of first degree of neck
  • second degree T20.67 — Corrosion of second degree of neck
  • third degree T20.77 — Corrosion of third degree of neck

Common questions about neck corrosion ICD-10 codes

What is the ICD-10 code for neck corrosion?

T20.47 — Corrosion of unspecified degree of neck (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T20.57, T20.67, T20.77.

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

T20.57 — Corrosion of first degree of neck (header code; choose a more specific subcode).

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

T20.67 — Corrosion of second degree of neck (header code; choose a more specific subcode).

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

T20.77 — Corrosion of third degree of neck (header code; choose a more specific subcode).

Is T20.47 billable?

No. T20.47 is a header code. Report one of its more specific subcodes instead.