H00.0 vs L01

H00.0 (Hordeolum (externum) (internum) of eyelid) compared with L01 (Impetigo), 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. L01 carries an Excludes2 note covering H00.0: “hordeolum (H00.0)”

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

Side by side

	H00.0Hordeolum (externum) (internum) of eyelid	L01Impetigo
Billing status	Non-billable header Report instead: H00.011, H00.012, H00.013, H00.014, H00.015	Non-billable header Report instead: L01.00, L01.01, L01.02, L01.03, L01.09
Classification	H00-H59 — Diseases of the Eye and Adnexa (H00-H59)	L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)
Definition	Hordeolum (externum) (internum) of eyelid is a non-billable ICD-10-CM category code (H00.0).	Impetigo is a non-billable ICD-10-CM category code (L01).
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