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T20.4

Non-billable

Corrosion of unspecified degree of head, face, and neck

Corrosion of unspecified degree of head, face, and neck

This is a header/category code. For billing purposes, use a more specific child code from the list below.

Status

Non-billable / Header

Block

T20-T25

Parent Code

T20

Child Codes

9

Coding Notes

Includes

Conditions included under this code

  • burns and corrosions of first degree [erythema]
  • burns and corrosions of second degree [blisters][epidermal loss]
  • burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

Excludes 2

Conditions not included here, but the patient may have both

  • burn and corrosion of ear drum (T28.41, T28.91)
  • burn and corrosion of eye and adnexa (T26.-)
  • burn and corrosion of mouth and pharynx (T28.0)

Code First

The underlying condition must be sequenced before this code

  • (T51-T65) to identify chemical and intent

Use Additional Code

Additional codes that should follow this code

  • code to identify any retained foreign body, if applicable (Z18.-)
  • code from category T31 or T32 to identify extent of body surface involved
  • external cause code to identify place (Y92)

Child Codes (9)

T20.40

Corrosion of unsp degree of head, face, and neck, unsp site

T20.41

Corrosion of unspecified degree of ear

T20.42

Corrosion of unspecified degree of lip(s)

T20.43

Corrosion of unspecified degree of chin

T20.44

Corrosion of unspecified degree of nose (septum)

T20.45

Corrosion of unspecified degree of scalp [any part]

T20.46

Corrosion of unspecified degree of forehead and cheek

T20.47

Corrosion of unspecified degree of neck

T20.49

Corrosion of unsp deg mult sites of head, face, and neck

Also Known As / Clinical Terms

UMLS

Frequently Asked Questions

What is ICD-10 code T20.4?

ICD-10-CM code T20.4 represents "Corrosion of unspecified degree of head, face, and neck". It is a non-billable header code — use a more specific child code for billing purposes.

Is T20.4 a billable code?

No, T20.4 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 9 child codes under T20.4.

What chapter is T20.4 in?

T20.4 is in Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (codes S00-T88).

What codes cannot be used with T20.4?

T20.4 has Excludes1 notes indicating codes that cannot be used together with it, including: birth trauma (P10-P15); obstetric trauma (O70-O71).

What are the subcategories under T20.4?

T20.4 has 9 child codes, including: T20.40 (Corrosion of unsp degree of head, face, and neck, unsp site), T20.41 (Corrosion of unspecified degree of ear), T20.42 (Corrosion of unspecified degree of lip(s)), T20.43 (Corrosion of unspecified degree of chin), and 5 more.

Are additional codes required with T20.4?

Yes, when using T20.4 you should also code: code to identify any retained foreign body, if applicable (Z18.-); code from category T31 or T32 to identify extent of body surface involved; external cause code to identify place (Y92).

What are the UMLS CUIs for T20.4?

T20.4 is linked to 1 UMLS Concept Unique Identifier: C2870524. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.