ICD-10 Code J10 – Influenza due to other identified influenza virus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J10 – Influenza due to other identified influenza virus
What it is
J10 identifies influenza caused by a documented influenza virus other than the seasonal strain named elsewhere. Use it when the record shows influenza, and the provider specifies the virus type. Check documentation.
Clinical signs
Typical findings include sudden fever, cough, sore throat, body aches, headache, and fatigue. Clinical features vary; refer to documentation, especially when the provider identifies the influenza virus as the basis for diagnosis.
When to use this code
Use J10 when the clinician documents influenza due to an identified influenza virus and does not select a more specific subtype. It may appear in confirmed influenza diagnoses, outpatient follow-up, or inpatient discharge summaries. You should code any documented complications or associated pneumonia separately when instructed.
Do not use for
Do not use J10 for influenza that is not identified by virus type, or when the record only says “flu-like illness.” Do not use it if documentation supports another respiratory infection instead. Check documentation.
Coding tip
Verify the provider’s wording carefully, because the virus must be identified to support J10.