J11.81Billable
Influenza due to unidentified influenza virus with encephalopathy
Short description: Flu due to unidentified influenza virus w encephalopathy
- Chapter
- 10. Diseases of the respiratory system
- Category
- J11
- Effective date
- October 1, 2026
Related codes in category J11
J11Influenza due to unidentified influenza virusJ11.0Influenza due to unidentified influenza virus with pneumoniaJ11.00Flu due to unidentified flu virus w unsp type of pneumoniaYesJ11.08Flu due to unidentified flu virus w specified pneumoniaYesJ11.1Flu due to unidentified influenza virus w oth resp manifestYesJ11.2Influenza due to unidentified influenza virus w GI manifestYesJ11.8Influenza due to unidentified influenza virus w oth manifestJ11.82Influenza due to unidentified influenza virus w myocarditisYesJ11.83Influenza due to unidentified influenza virus w otitis mediaYesJ11.89Influenza due to unidentified influenza virus w oth manifestYes
Frequently asked questions
What is ICD-10 code J11.81?
J11.81 is an ICD-10-CM diagnosis code for Influenza due to unidentified influenza virus with encephalopathy.
Is J11.81 a billable code?
Yes. J11.81 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is J11.81 in?
J11.81 falls under Chapter 10: Diseases of the respiratory system.
When did J11.81 become effective?
J11.81 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to J11.81?
J11.81 belongs to category J11, which includes 10 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.