T25.5 is the authoritative medical code for Corrosion of first degree of ankle and foot. This classification is used in medical billing and clinical recording to specify the clinical criteria for corrosion of first degree of ankle and foot (ICD-10-CM T25.5), 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 ankle and foot is a non-billable ICD-10-CM category code T25.5. 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. 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 T25.5 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
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 T25.5 be billed directly?
No. T25.5 (Corrosion of first degree of 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 T25.5 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T25.
Does T25.5 need to be sequenced after another code?
Yes. Code first: (T51-T65) to identify chemical and intent.
Is an additional code needed with T25.5?
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.
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as T25.5, 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
- T25.012S — Burn of unspecified degree of left ankle, sequela
- T25.019 — Burn of unspecified degree of unspecified ankle
- T25.019A — Burn of unspecified degree of unspecified ankle, initial encounter
- T25.019D — Burn of unspecified degree of unspecified ankle, subsequent encounter
- T25.019S — Burn of unspecified degree of unspecified ankle, sequela
- T25.02 — Burn of unspecified degree of foot
- T25.021 — Burn of unspecified degree of right foot
- T25.021A — Burn of unspecified degree of right foot, initial encounter
- T25.021D — Burn of unspecified degree of right foot, subsequent encounter
- T25.021S — Burn of unspecified degree of right foot, sequela
- T25.022 — Burn of unspecified degree of left foot
- T25.022A — Burn of unspecified degree of left foot, initial encounter
- T25.022D — Burn of unspecified degree of left foot, subsequent encounter
- T25.022S — Burn of unspecified degree of left foot, sequela
- T25.029 — Burn of unspecified degree of unspecified foot
- T25.029A — Burn of unspecified degree of unspecified foot, initial encounter
- T25.029D — Burn of unspecified degree of unspecified foot, subsequent encounter
- T25.029S — Burn of unspecified degree of unspecified foot, sequela
- T25.03 — Burn of unspecified degree of toe(s) (nail)
- T25.031 — Burn of unspecified degree of right toe(s) (nail)
- T25.031A — Burn of unspecified degree of right toe(s) (nail), initial encounter
- T25.031D — Burn of unspecified degree of right toe(s) (nail), subsequent encounter
- T25.031S — Burn of unspecified degree of right toe(s) (nail), sequela
- T25.032 — Burn of unspecified degree of left toe(s) (nail)
- T25.032A — Burn of unspecified degree of left toe(s) (nail), initial encounter
- T25.032D — Burn of unspecified degree of left toe(s) (nail), subsequent encounter
- T25.032S — Burn of unspecified degree of left toe(s) (nail), sequela
- T25.039 — Burn of unspecified degree of unspecified toe(s) (nail)
- T25.039A — Burn of unspecified degree of unspecified toe(s) (nail), initial encounter
- T25.039D — Burn of unspecified degree of unspecified toe(s) (nail), subsequent encounter
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code T22.5
Corrosion of first degree of shoulder and upper limb, except wrist and hand
ICD Code T24.5
Corrosion of first degree of lower limb, except ankle and foot