NPI Atlas

L43.2 – Lichenoid drug reaction

ICD-10-CM 2027 diagnosis code · Papulosquamous disorders

Billable code

ICD-10-CM code L43.2

Code: L43.2 (claims format: L432)
Description: Lichenoid drug reaction
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: L40-L45 Papulosquamous disorders
Parent codes: L43

Notes for L43.2

Use additional code:

code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Notes inherited from parent codes

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

L43 – Lichen planus

Excludes1 (not coded here):

lichen planopilaris (L66.1-)

Index terms for L43.2

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

Reaction, drug NEC, lichenoid

Related codes in L43

L43.0 – Hypertrophic lichen planusBillable
L43.1 – Bullous lichen planusBillable
L43.3 – Subacute (active) lichen planusBillable
L43.8 – Other lichen planusBillable
L43.9 – Lichen planus, unspecifiedBillable

Frequently asked questions

What is ICD-10 code L43.2?

L43.2 is the ICD-10-CM code for lichenoid drug reaction, in the block L40-L45 (Papulosquamous disorders).

Is L43.2 a billable code?

Yes. L43.2 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does L43.2 belong to?

It belongs to category L43 – Lichen planus.

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.