J11.81
Billable codeInfluenza due to unidentified influenza virus with encephalopathy
The ICD-10 code for influenza due to unidentified influenza virus with encephalopathy is J11.81.
Clinical notes
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Influenzal encephalopathy NOS
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- J11.82Influenza due to unidentified influenza virus with myocarditis
- J11.83Influenza due to unidentified influenza virus with otitis media
- J11.89Influenza due to unidentified influenza virus with other manifestations
- J11.81Influenza due to unidentified influenza virus with encephalopathy
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 4878Approximate match
Associated MS-DRGs
J11.81 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.