ICD-10-CM · FY 2026 APRIL UPDATE
L04
Acute lymphadenitis
Diagnosis reference
Nonbillable categoryThis entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.
Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification
Related entries
Up to 30 descendants in this category
| CODE | DESCRIPTION | TYPE |
|---|---|---|
| L04.0 | Acute lymphadenitis of face, head and neck | Billable |
| L04.1 | Acute lymphadenitis of trunk | Billable |
| L04.2 | Acute lymphadenitis of upper limb | Billable |
| L04.3 | Acute lymphadenitis of lower limb | Billable |
| L04.8 | Acute lymphadenitis of other sites | Billable |
| L04.9 | Acute lymphadenitis, unspecified | Billable |
Use the complete reference
This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.
Open official CMS files