L43: Lichen planus
Codes under L43 (Lichen planus). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| L43.0 | Hypertrophic lichen planus | ✓ |
| L43.0 | Hypertrophic lichen planus | ✓ |
| L43.1 | Bullous lichen planus | ✓ |
| L43.1 | Bullous lichen planus | ✓ |
| L43.2 | Lichenoid drug reaction | ✓ |
| L43.2 | Lichenoid drug reaction | ✓ |
| L43.3 | Subacute (active) lichen planus | ✓ |
| L43.3 | Subacute (active) lichen planus | ✓ |
| L43.8 | Other lichen planus | ✓ |
| L43.8 | Other lichen planus | ✓ |
| L43.9 | Lichen planus, unspecified | ✓ |
| L43.9 | Lichen planus, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code L43?
L43 is an ICD-10-CM category covering Lichen planus. It contains 12 more specific diagnosis codes, 12 of which are billable.
Is L43 a billable code?
No — L43 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example L43.0 — Hypertrophic lichen planus). 12 of the 12 codes under L43 are billable.
What codes fall under L43?
L43 includes L43.0, L43.0, L43.1, L43.1, L43.2, plus 7 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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