R83 – Abnormal findings in cerebrospinal fluid
ICD-10-CM 2027 diagnosis code · Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
- Code
R83(claims format:R83)- Description
- Abnormal findings in cerebrospinal fluid
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
- Block
- R83-R89 Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
Billable codes under R83
R83 is a header code and cannot be used on claims. Choose the most specific code:
- R83.0 – Abnormal level of enzymes in cerebrospinal fluidBillable
- R83.1 – Abnormal level of hormones in cerebrospinal fluidBillable
- R83.2 – Abnormal level of other drugs, medicaments and biological substances in cerebrospinal fluidBillable
- R83.3 – Abnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluidBillable
- R83.4 – Abnormal immunological findings in cerebrospinal fluidBillable
- R83.5 – Abnormal microbiological findings in cerebrospinal fluidBillable
- R83.6 – Abnormal cytological findings in cerebrospinal fluidBillable
- R83.8 – Other abnormal findings in cerebrospinal fluidBillable
- R83.9 – Unspecified abnormal finding in cerebrospinal fluidBillable
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block R83-R89
- abnormal findings on antenatal screening of mother (O28.-)
- diagnostic abnormal findings classified elsewhere - see Alphabetical Index
Frequently asked questions
What is ICD-10 code R83?
R83 is the ICD-10-CM code for abnormal findings in cerebrospinal fluid, in the block R83-R89 (Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis).
Is R83 a billable code?
No. R83 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.