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T21.7

Non-billable

Corrosion of third degree of trunk

Corrosion of third degree of trunk

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

T21

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]
  • burns and corrosion of hip region

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

  • burns and corrosion of axilla (T22.- with fifth character 4)
  • burns and corrosion of scapular region (T22.- with fifth character 6)
  • burns and corrosion of shoulder (T22.- with fifth character 5)

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)

T21.70

Corrosion of third degree of trunk, unspecified site

T21.71

Corrosion of third degree of chest wall

T21.72

Corrosion of third degree of abdominal wall

T21.73

Corrosion of third degree of upper back

T21.74

Corrosion of third degree of lower back

T21.75

Corrosion of third degree of buttock

T21.76

Corrosion of third degree of male genital region

T21.77

Corrosion of third degree of female genital region

T21.79

Corrosion of third degree of other site of trunk

Also Known As / Clinical Terms

UMLS

Frequently Asked Questions

What is ICD-10 code T21.7?

ICD-10-CM code T21.7 represents "Corrosion of third degree of trunk". It is a non-billable header code — use a more specific child code for billing purposes.

Is T21.7 a billable code?

No, T21.7 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 T21.7.

What chapter is T21.7 in?

T21.7 is in Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (codes S00-T88).

What codes cannot be used with T21.7?

T21.7 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 T21.7?

T21.7 has 9 child codes, including: T21.70 (Corrosion of third degree of trunk, unspecified site), T21.71 (Corrosion of third degree of chest wall), T21.72 (Corrosion of third degree of abdominal wall), T21.73 (Corrosion of third degree of upper back), and 5 more.

Are additional codes required with T21.7?

Yes, when using T21.7 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 T21.7?

T21.7 is linked to 1 UMLS Concept Unique Identifier: C0452002. 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.