R83
⚠ Non-billable
Abnormal findings in cerebrospinal fluid
ICD-10-CM · FY2026 · Symptoms, Signs and Abnormal Clinical and Laboratory Findings
Code
R83
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Symptoms, Signs and Abnormal Clinical and Laboratory Findings
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code R83?
ICD-10-CM code R83 represents Abnormal findings in cerebrospinal fluid. It is a non-billable header code requiring a more specific subcategory in the Symptoms, Signs and Abnormal Clinical and Laboratory Findings chapter, effective October 1, 2025 – September 30, 2026.
Is R83 billable?
No. R83 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is R83 in?
R83 belongs to the Symptoms, Signs and Abnormal Clinical and Laboratory Findings chapter (R00–R99) of ICD-10-CM.
Related codes in the R83 category
R83.0
Abnormal level of enzymes in cerebrospinal fluid
Billable
R83.1
Abnormal level of hormones in cerebrospinal fluid
Billable
R83.2
Abnormal level of other drugs, medicaments and biological substances in cerebrospinal fluid
Billable
R83.3
Abnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluid
Billable
R83.4
Abnormal immunological findings in cerebrospinal fluid
Billable
R83.5
Abnormal microbiological findings in cerebrospinal fluid
Billable
R83.6
Abnormal cytological findings in cerebrospinal fluid
Billable
R83.8
Other abnormal findings in cerebrospinal fluid
Billable
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