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T20.7

⚠ Non-billable (Header)

Corrosion of third degree of head, face, and neck

Injury, poisoning and certain other consequences of external causes (S00-T88)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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⚠️ Excludes2

inherited

Rules inherited from parent codes.

T20
  • • 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 Instructions

direct
  • • external cause code to identify place (Y92)
  • • Code first: (T51-T65) to identify chemical and intent

Child Codes (9)

T20.70Corrosion of third degree of head, face, and neck, unspecified siteT20.71Corrosion of third degree of ear [any part, except ear drum]T20.72Corrosion of third degree of lip(s)T20.73Corrosion of third degree of chinT20.74Corrosion of third degree of nose (septum)T20.75Corrosion of third degree of scalp [any part]T20.76Corrosion of third degree of forehead and cheekT20.77Corrosion of third degree of neckT20.79Corrosion of third degree of multiple sites of head, face, and neck

Clinical Description

ICD-10-CM code T20.7 represents corrosion of third degree of head, face, and neck. This code falls under the Injury, poisoning and certain other consequences of external causes (S00-T88) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

This is a 5-character code at the 4th level of specificity. There are 9 more specific child codes under T20.7.

Frequently Asked Questions

What is ICD-10 code T20.7?

ICD-10-CM code T20.7 is "Corrosion of third degree of head, face, and neck". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).

Is T20.7 a billable ICD-10 code?

No, T20.7 is a non-billable header code. A more specific child code must be used for billing.

Can T20.7 be coded with other codes?

T20.7 has 3 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in T20

Other codes in the same category that may be relevant for differential coding:

T20.0Burn of unspecified degree of head, face, and neckT20.1Burn of first degree of head, face, and neckT20.2Burn of second degree of head, face, and neckT20.3Burn of third degree of head, face, and neckT20.4Corrosion of unspecified degree of head, face, and neckT20.5Corrosion of first degree of head, face, and neckT20.6Corrosion of second degree of head, face, and neck

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Code Information

CodeT20.7
BillableNo — Header code
ParentT20
CategoryInjury, poisoning and certain other consequences of external causes (S00-T88)
Excludes10 rule(s)
Excludes23 note(s)
Child codes9

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)