ICD-10-CM Code R83.9

Unspecified abnormal finding in cerebrospinal fluid

Version 2020 Billable Code No Valid Principal Dx

Valid for Submission

R83.9 is a billable code used to specify a medical diagnosis of unspecified abnormal finding in cerebrospinal fluid. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code R83.9 might also be used to specify conditions or terms like cerebrospinal fluid examination abnormal or csf chemistry abnormal.

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.

Short Description:Unspecified abnormal finding in cerebrospinal fluid
Long Description:Unspecified abnormal finding in cerebrospinal fluid

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code R83.9 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Cerebrospinal fluid examination abnormal
  • CSF chemistry abnormal

Convert R83.9 to ICD-9

  • 792.0 - Abn fnd-cerebrospinal fl (Approximate Flag)

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 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020