T20.41

⚠ Non-billable (Header)

Corrosion of unspecified degree of ear [any part, except ear drum]

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.

Check This Code

⚠️ Excludes2

direct

Both codes can exist if both conditions are documented.

• corrosion of ear drum (T28.91-)

⚠️ 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

inherited

T20.4

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

Child Codes (3)

T20.411Corrosion of unspecified degree of right ear [any part, except ear drum]Header T20.412Corrosion of unspecified degree of left ear [any part, except ear drum]Header T20.419Corrosion of unspecified degree of unspecified ear [any part, except ear drum]Header

Clinical Description

ICD-10-CM code T20.41 represents corrosion of unspecified degree of ear [any part, except ear drum]. 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 6-character code at the 5th level of specificity. There are 3 more specific child codes under T20.41.

Frequently Asked Questions

What is ICD-10 code T20.41?

ICD-10-CM code T20.41 is "Corrosion of unspecified degree of ear [any part, except ear drum]". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).

Is T20.41 a billable ICD-10 code?

No, T20.41 is a non-billable header code. A more specific child code must be used for billing.

Can T20.41 be coded with other codes?

T20.41 has 4 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in T20.4

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

T20.40Corrosion of unspecified degree of head, face, and neck, unspecified site T20.42Corrosion of unspecified degree of lip(s)T20.43Corrosion of unspecified degree of chin T20.44Corrosion of unspecified degree of nose (septum)T20.45Corrosion of unspecified degree of scalp [any part]T20.46Corrosion of unspecified degree of forehead and cheek T20.47Corrosion of unspecified degree of neck T20.49Corrosion of unspecified degree of multiple sites of head, face, and neck

🧪 Validate Combinations

Add T20.41 to the Excludes Checker to validate against your full code list.

Open in Checker →

Code Information

CodeT20.41

BillableNo — Header code

ParentT20.4

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

Excludes10 rule(s)

Excludes24 note(s)

Child codes3

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)