L57.9 – Skin changes due to chronic exposure to nonionizing radiation, unspecified

ICD-10-CM 2027 diagnosis code · Radiation-related disorders of the skin and subcutaneous tissue

Billable code

ICD-10-CM code L57.9

Code: L57.9 (claims format: L579)
Description: Skin changes due to chronic exposure to nonionizing radiation, unspecified
Short description: Skin changes due to chr expsr to nonionizing radiation, unsp
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 12. Diseases of the skin and subcutaneous tissue (L00-L99)
Block: L55-L59 Radiation-related disorders of the skin and subcutaneous tissue
Parent codes: L57

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

L57 – Skin changes due to chronic exposure to nonionizing radiation

Use additional code:

code to identify the source of the ultraviolet radiation (W89), or other nonionizing radiation (W90)

Index terms for L57.9

Entries in the ICD-10-CM alphabetic index that lead to this code:

Change, skin, chronic, due to nonionizing radiation

Related codes in L57

L57.0 – Actinic keratosisBillable
L57.1 – Actinic reticuloidBillable
L57.2 – Cutis rhomboidalis nuchaeBillable
L57.3 – Poikiloderma of CivatteBillable
L57.4 – Cutis laxa senilisBillable
L57.5 – Actinic granulomaBillable
L57.8 – Other skin changes due to chronic exposure to nonionizing radiationBillable

Frequently asked questions

What is ICD-10 code L57.9?

L57.9 is the ICD-10-CM code for skin changes due to chronic exposure to nonionizing radiation, unspecified, in the block L55-L59 (Radiation-related disorders of the skin and subcutaneous tissue).

Is L57.9 a billable code?

Yes. L57.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does L57.9 belong to?

It belongs to category L57 – Skin changes due to chronic exposure to nonionizing radiation.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.