A81Non-billable (header)
Atypical virus infections of central nervous system
Related Codes· Viral and prion infections of the central nervous system (A80-A89)
A80Acute poliomyelitisA82RabiesA83Mosquito-borne viral encephalitisA84Tick-borne viral encephalitisA85Other viral encephalitis, not elsewhere classifiedA86Unspecified viral encephalitisA87Viral meningitisA88Other viral infections of central nervous system, not elsewh…A89Unspecified viral infection of central nervous system
Sub-codes of A81(5)
A81 is a non-billable header. Select a sub-code to bill.
✓ Includes
- •diseases of the central nervous system caused by prions
Notes
- ℹcode, if applicable, to identify:
- ℹdementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)
- ℹdementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)
- ℹdementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)
- ℹdementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)
- ℹdementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)
- ℹmild neurocognitive disorder due to known physiological condition (F06.7-)
Code Hierarchy
┌1Certain infectious and parasitic diseases (A00-B99)├A80-A89Viral and prion infections of the central nervous system (A80-A89)├A81Atypical virus infections of central nervous system
└A81Atypical virus infections of central nervous system
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