AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2025 Issue 4; New/Revised ICD-10-CM Codes

Cutaneous Abscess, Furuncle, Cellulitis, and Acute Lymphangitis of Flank

The flank, also known as the lumbar region or latus, refers to the area of the thorax located between the posterior costal margin and the top of the iliac crest. Currently, ICD-10-CM does not have specific codes to capture the flank as a specific anatomic region of the trunk and typically directs to the abdomen or abdominal wall. Subcategories L02.21, Cutaneous abscess of trunk, L02.22, Furuncle of trunk, L03.31, Cellulitis of trunk, and L03.32, Acute lymphangitis of trunk, were expanded with the addition of new codes to capture flank as a specific anatomic...

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