Atypical virus infections of central nervous system
- A81 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
- The 2024 edition of ICD-10-CM A81 became effective on October 1, 2023.
- This is the American ICD-10-CM version of A81 – other international versions of ICD-10 A81 may differ.
Use Additional
- code, if applicable, to identify:
- dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)
- dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)
- dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)
- dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)
- dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)
- mild neurocognitive disorder due to known physiological condition (F06.7-)
Includes
- diseases of the central nervous system caused by prions
The following code(s) above A81 contain annotation back-references
that may be applicable to A81:
- A00-B99 Certain infectious and parasitic diseases
- A80-A89 Viral and prion infections of the central nervous system
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2023 (effective 10/1/2022): No change
- 2024 (effective 10/1/2023): No change