ICD-10 code guides
Reviewed July 1, 2026

ICD-10 codes for sinusitis

Sinusitis coding depends on acute versus chronic and sinus location. Unspecified acute sinusitis is common, but maxillary, frontal, ethmoidal, and sphenoidal sites have their own codes.

J01.90 billable

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Paste or dictate a de-identified clinical note — a few sentences is enough.

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Review each suggested code and its evidence, then copy the codes you agree with.

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ICD-10-CM

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Sinusitis ICD-10 codes

Start with the primary code, then move to a more specific related code when the documentation supports it.

CodeDescriptionSystem

J01.90

Acute sinusitis, unspecified

ICD-10-CM

J01.00

Acute maxillary sinusitis, unspecified

ICD-10-CM

J01.10

Acute frontal sinusitis, unspecified

ICD-10-CM

J32.9

Chronic sinusitis, unspecified

ICD-10-CM

J30.9

Allergic rhinitis, unspecified

ICD-10-CM

How to choose the right code

Use J01.- for acute sinusitis and J32.- for chronic sinusitis. Pick a site-specific code when maxillary, frontal, ethmoidal, or sphenoidal involvement is documented. Do not code allergic rhinitis as sinusitis unless sinusitis is diagnosed.

Documentation example

Ten days of worsening facial pressure, purulent nasal discharge, and maxillary tenderness after viral URI. No orbital symptoms. Assessment: acute maxillary sinusitis; delayed antibiotic prescription and nasal steroid.

Suggested:

J01.00

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FactsContext extracts clinical facts first: diagnoses, symptoms, negatives, findings, test results, medications, and plan decisions.

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FAQ

When is sinusitis chronic?

Chronic sinusitis should be documented clinically as chronic, often with prolonged or recurrent symptoms. Coding then moves from J01.- to J32.-.

How specific should acute sinusitis coding be?

Use the site-specific acute code when the note documents maxillary, frontal, ethmoidal, or sphenoidal sinus involvement.

Can AI distinguish rhinitis from sinusitis?

Notat extracts duration, discharge, facial tenderness, diagnosis, and treatment plan as clinical facts, then suggests the code supported by the assessment.

Related ICD-10 guides

Keep moving through the condition hub, or open the general medical coding guide for more coding systems and extractors.

Medical coding hub