1. ICD-10-CM Codes
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2. G00-G99
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3. G30-G32
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4. G31-
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5. 2023 ICD-10-CM Diagnosis Code G31.85

2023 ICD-10-CM Diagnosis Code G31.85

Corticobasal degeneration

2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

• G31.85 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2023 edition of ICD-10-CM G31.85 became effective on October 1, 2022.
• This is the American ICD-10-CM version of G31.85 - other international versions of ICD-10 G31.85 may differ.

• 056 Degenerative nervous system disorders with mcc
• 057 Degenerative nervous system disorders without mcc

Convert G31.85 to ICD-9-CM

• 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

• Use Additional: G31
  ICD-10-CM Diagnosis Code G31

  Other degenerative diseases of nervous system, not elsewhere classified

  2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code

  Type 2 Excludes

  • Reye's syndrome (G93.7)

  Use Additional

  • For codes G31.0-G31.83, G31.85-G31.9, 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-)

• Degeneration, degenerative
  • corticobasal G31.85

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.