H70.1
Non-billableChronic mastoiditis
H70.1 is the ICD-10-CM code for Chronic mastoiditis. It is a non-billable category code — use a more specific child code such as H70.10 for billing.
H60-H95 Diseases of the ear and mastoid process
What this means — in plain language
MedlinePlus · NIHEar infections are the most common reason parents bring their child to a doctor. Three out of four children will have at least one ear infection by their third birthday. Adults can also get ear infections, but they are less common. The infection usually affects the middle ear and is called otitis media. The tubes inside the ears become clogged with fluid and mucus. This can affect hearing, because sound cannot get…
Read more about Ear Infections at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •Caries of mastoid
- •Fistula of mastoid
Excludes1 — not coded here
- •tuberculous mastoiditis (A18.03)
Frequently asked questions
- What is ICD-10 code H70.1?
- H70.1 is the ICD-10-CM code for "Chronic mastoiditis". It falls under H60-H95 Diseases of the ear and mastoid process.
- Is H70.1 a billable code?
- No — H70.1 is a non-billable header code. Use a more specific child code (such as H70.10) for billing.
- What are the subcodes of H70.1?
- H70.1 has 4 more specific child codes, including H70.10, H70.11, H70.12.
- What is excluded from H70.1?
- Excludes1 (not coded here): tuberculous mastoiditis (A18.03).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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