ICD10
ICD-10 Code J01.9: Acute sinusitis, unspecified
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the respiratory system (J00-J99).
When is it used?
- May be used when a clinician documents acute sinusitis, unspecified in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
10Diseases of the respiratory system (J00-J99)
block
J00-J06Acute upper respiratory infections
category
J01Acute sinusitis
currentJ01
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
PulmonologistGeneral Physician
Sibling codes
Mapped diagnoses and classifications
SNOMED_CT 111274000high
Acute abscess of nasal sinus
Source: SNOMED International ICD-10 map
SNOMED_CT 75498004high
Acute bacterial sinusitis
Source: SNOMED International ICD-10 map
SNOMED_CT 58763001high
Acute empyema of nasal sinus
Source: SNOMED International ICD-10 map
SNOMED_CT 431231008high
Acute rhinosinusitis
Source: SNOMED International ICD-10 map
SNOMED_CT 15805002high
Acute sinusitis
Source: SNOMED International ICD-10 map
SNOMED_CT 725916003high
Acute sinusitis caused by fungus
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
J01.9
Replacement codes
J01.90 — Acute sinusitis, unspecifiedJ01.91 — Acute recurrent sinusitis, unspecified
Common synonyms
Acute sinusitis, unspecifiedAcute sinusitis
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.