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  6. 2026 ICD-10-CM Code R83

2026 ICD-10-CM Diagnosis Code R83

Abnormal findings in cerebrospinal fluid

ICD-10-CM Code:
R83
ICD-10 Code for:
Abnormal findings in cerebrospinal fluid
Is Billable?
Not Valid for Submission
Code Navigator:

R83 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity from the list below for a diagnosis of abnormal findings in cerebrospinal fluid. The code is not specific and is NOT valid for the year 2026 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

According to ICD-10-CM guidelines this code should not to be used as a principal diagnosis code when a related definitive diagnosis has been established.

Specific Coding Applicable to Abnormal findings in cerebrospinal fluid

Non-specific codes like R83 require more digits to indicate the appropriate level of specificity. Consider using any of the following billable codes with a higher level of specificity when coding for abnormal findings in cerebrospinal fluid:

  • Use R83.0 for Abnormal level of enzymes in cerebrospinal fluid

  • Use R83.1 for Abnormal level of hormones in cerebrospinal fluid

  • Use R83.2 for Abnormal level of other drugs, medicaments and biological substances in cerebrospinal fluid

  • Use R83.3 for Abnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluid

  • Use R83.4 for Abnormal immunological findings in cerebrospinal fluid

  • Use R83.5 for Abnormal microbiological findings in cerebrospinal fluid

  • Use R83.6 for Abnormal cytological findings in cerebrospinal fluid

  • Use R83.8 for Other abnormal findings in cerebrospinal fluid

  • Use R83.9 for Unspecified abnormal finding in cerebrospinal fluid

Code Classification

  • Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
    R00–R99
    • Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
      R83-R89
      • Abnormal findings in cerebrospinal fluid
        R83

Code History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
  • FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.