K61 vs L03

K61 (Abscess of anal and rectal regions) compared with L03 (Cellulitis and acute lymphangitis), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Can these codes be reported together?

Yes, when both are documented. L03 carries an Excludes2 note covering K61: “cellulitis of anal and rectal region (K61.-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

	K61Abscess of anal and rectal regions	L03Cellulitis and acute lymphangitis
Billing status	Non-billable header Report instead: K61.0, K61.1, K61.2, K61.31, K61.39	Non-billable header Report instead: L03.011, L03.012, L03.019, L03.021, L03.022
Classification	K00-K95 — Diseases of the Digestive System (K00-K95)	L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)
Definition	Abscess of anal and rectal regions is a non-billable ICD-10-CM category code (K61).	Cellulitis and acute lymphangitis is a non-billable ICD-10-CM category code (L03).
Includes	abscess of anal and rectal regions cellulitis of anal and rectal regions	—
Use additional code	—	code (B95-B97) to identify infectious agent.

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources