H70 vs H74

H70 (Mastoiditis and related conditions) compared with H74 (Other disorders of middle ear mastoid), 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. H74 carries an Excludes2 note covering H70: “mastoiditis (H70.-)”

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

Side by side

	H70Mastoiditis and related conditions	H74Other disorders of middle ear mastoid
Billing status	Non-billable header Report instead: H70.001, H70.002, H70.003, H70.009, H70.011	Non-billable header Report instead: H74.01, H74.02, H74.03, H74.09, H74.11
Classification	H60-H95 — Diseases of the Ear and Mastoid Process (H60-H95)	H60-H95 — Diseases of the Ear and Mastoid Process (H60-H95)
Definition	Mastoiditis and related conditions is a non-billable ICD-10-CM category code (H70).	Other disorders of middle ear mastoid is a non-billable ICD-10-CM category code (H74).

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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