- A81.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2024 edition of ICD-10-CM A81.9 became effective on October 1, 2022.
- This is the American ICD-10-CM version of A81.9 – other international versions of ICD-10 A81.9 may differ.
ICD-10-CM A81.9 is grouped within Diagnostic Related Group(s):
- 056 Degenerative nervous system disorders with mcc
- 057 Degenerative nervous system disorders without mcc
- 974 Hiv with major related condition with mcc
- 975 Hiv with major related condition with cc
- 976 Hiv with major related condition without cc/mcc
Applicable To
- Prion diseases of the central nervous system NOS
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2016 (effective 10/1/2015): No change
- 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
- 2024 (effective 10/1/2022): No change
Diagnosis Index entries containing back-references to A81.9:
- prion, central nervous system > Disease, diseased
- virus > atypical
- slow virus > Infection, infected, infective (opportunistic) B99.9
- atypical > central nervous system A89
- slow virus > central nervous system A89
- slow > virus, viral NOS B34.9