J11

ICD-10Non-billable category

Influenza due to unidentified influenza virus

Official ICD-10-CM descriptor (FY2026)

Influenza due to unidentified influenza virus

J11 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

More specific codes under J11

J11.0Influenza due to unidentified influenza virus with pneumoniacategory
J11.1Flu due to unidentified influenza virus w oth resp manifest
J11.2Influenza due to unidentified influenza virus w GI manifest
J11.8Influenza due to unidentified influenza virus w oth manifestcategory

Where this code sits

Chapter: 10. Diseases of the respiratory system (J00-J99)
Block: Influenza and pneumonia (J09-J18)

Krasyn AI Coder

Get code suggestions automatically as you type notes. Free for 50 analyses.

Install for Chrome — free

Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.