T25.41 is the authoritative medical code for Corrosion of unspecified degree of ankle. This classification is used in medical billing and clinical recording to specify the clinical criteria for corrosion of unspecified degree of ankle (ICD-10-CM T25.41), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Corrosion of unspecified degree of ankle is a non-billable ICD-10-CM category code T25.41. A more specific billable subcode must be selected for claims submission. Includes: burns and corrosions of first degree erythema; burns and corrosions of second degree blistersepidermal loss; burns and corrosions of third degree deep necrosis of underlying tissue full- thickness skin loss. Code first: T51-T65 to identify chemical and intent. Use additional code: external cause code to identify place Y92; code from category T31 or T32 to identify extent of body surface involved. 7th character: The appropriate 7th character is to be added to each code from category T25.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T25.41 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- burns and corrosions of first degree erythema
- burns and corrosions of second degree blistersepidermal loss
- burns and corrosions of third degree deep necrosis of underlying tissue full- thickness skin loss
Code First
Underlying conditions that must be sequenced before this code.
- T51-T65 to identify chemical and intent
Use Additional Code
Supplementary codes the tabular list directs you to add.
- external cause code to identify place Y92
- code from category T31 or T32 to identify extent of body surface involved
Frequently Asked Questions (FAQ) & Clinical Guidance
Can T25.41 be billed directly?
No. T25.41 (Corrosion of unspecified degree of ankle) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does T25.41 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T25.
Does T25.41 need to be sequenced after another code?
Yes. Code first: (T51-T65) to identify chemical and intent.
Is an additional code needed with T25.41?
Use additional code(s) to specify: external cause code to identify place (Y92); code from category T31 or T32 to identify extent of body surface involved.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to T25.41 in its code family, with their registry titles.
- T25 — Burn and corrosion of ankle and foot
- T25.0 — Burn of unspecified degree of ankle and foot
- T25.01 — Burn of unspecified degree of ankle
- T25.011 — Burn of unspecified degree of right ankle
- T25.011A — Burn of unspecified degree of right ankle, initial encounter
- T25.011D — Burn of unspecified degree of right ankle, subsequent encounter
- T25.011S — Burn of unspecified degree of right ankle, sequela
- T25.012 — Burn of unspecified degree of left ankle
- T25.012A — Burn of unspecified degree of left ankle, initial encounter
- T25.012D — Burn of unspecified degree of left ankle, subsequent encounter
View all 40 codes in the T25 family