T24.5 is the authoritative medical code for Corrosion of first degree of lower limb, except ankle and foot. This classification is used in medical billing and clinical recording to specify the clinical criteria for corrosion of first degree of lower limb, except ankle and foot (ICD-10-CM T24.5), 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 first degree of lower limb, except ankle and foot is a non-billable ICD-10-CM category code T24.5. 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. Excludes2 (not included here): burn and corrosion of ankle and foot T25.-; burn and corrosion of hip region T21.-. 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 T24.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T24.5 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
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- burn and corrosion of ankle and foot T25.-
- burn and corrosion of hip region T21.-
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 T24.5 be billed directly?
No. T24.5 (Corrosion of first degree of lower limb, except ankle and foot) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does T24.5 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T24.
Can T24.5 be reported alongside related conditions?
Per official ICD-10-CM Excludes2 instructions, T24.5 and the following are not considered part of each other and may both be reported when both conditions are present: burn and corrosion of ankle and foot (T25.-); burn and corrosion of hip region (T21.-).
Does T24.5 need to be sequenced after another code?
Yes. Code first: (T51-T65) to identify chemical and intent.
Is an additional code needed with T24.5?
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 T24.5 in its code family, with their registry titles.
- T24 — Burn and corrosion of lower limb, except ankle and foot
- T24.0 — Burn of unspecified degree of lower limb, except ankle and foot
- T24.00 — Burn of unspecified degree of unspecified site of lower limb, except ankle and foot
- T24.001 — Burn of unspecified degree of unspecified site of right lower limb, except ankle and foot
- T24.001A — Burn of unspecified degree of unspecified site of right lower limb, except ankle and foot, initial encounter
- T24.001D — Burn of unspecified degree of unspecified site of right lower limb, except ankle and foot, subsequent encounter
- T24.001S — Burn of unspecified degree of unspecified site of right lower limb, except ankle and foot, sequela
- T24.002 — Burn of unspecified degree of unspecified site of left lower limb, except ankle and foot
- T24.002A — Burn of unspecified degree of unspecified site of left lower limb, except ankle and foot, initial encounter
- T24.002D — Burn of unspecified degree of unspecified site of left lower limb, except ankle and foot, subsequent encounter
View all 40 codes in the T24 family