L56.4 – Polymorphous light eruption
ICD-10-CM 2027 diagnosis code · Radiation-related disorders of the skin and subcutaneous tissue
- Code
L56.4(claims format:L564)- Description
- Polymorphous light eruption
- 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
- L56
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
L56 – Other acute skin changes due to ultraviolet radiation
Index terms for L56.4
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in L56
- L56.0 – Drug phototoxic responseBillable
- L56.1 – Drug photoallergic responseBillable
- L56.2 – Photocontact dermatitis [berloque dermatitis]Billable
- L56.3 – Solar urticariaBillable
- L56.5 – Disseminated superficial actinic porokeratosis (DSAP)Billable
- L56.8 – Other specified acute skin changes due to ultraviolet radiationBillable
- L56.9 – Acute skin change due to ultraviolet radiation, unspecifiedBillable
Frequently asked questions
What is ICD-10 code L56.4?
L56.4 is the ICD-10-CM code for polymorphous light eruption, in the block L55-L59 (Radiation-related disorders of the skin and subcutaneous tissue).
Is L56.4 a billable code?
Yes. L56.4 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does L56.4 belong to?
It belongs to category L56 – Other acute skin changes due to ultraviolet 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.