U.S. ICD-10-CM · FY 2027

R83 ICD-10-CM Code: Abnormal findings in cerebrospinal fluid

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

R83

Abnormal findings in cerebrospinal fluid

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where R83 sits

  1. 1

    Chapter 18

    Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

  2. 2

    Section

    Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis (R83-R89)

  3. 3

    Category R83

    Abnormal findings in cerebrospinal fluid

  4. 4

    Code R83

    Abnormal findings in cerebrospinal fluid

More specific choices

Codes under R83

R83 is a non-billable category. Choose the child code that best matches the documented diagnosis.

R83.0

Abnormal level of enzymes in cerebrospinal fluid

R83.1

Abnormal level of hormones in cerebrospinal fluid

R83.2

Abnormal level of other drugs, medicaments and biological substances in cerebrospinal fluid

R83.3

Abnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluid

R83.4

Abnormal immunological findings in cerebrospinal fluid

R83.5

Abnormal microbiological findings in cerebrospinal fluid

R83.6

Abnormal cytological findings in cerebrospinal fluid

R83.8

Other abnormal findings in cerebrospinal fluid

R83.9

Unspecified abnormal finding in cerebrospinal fluid

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for R83.

Code first

No “code first” instruction is listed for R83.

Use additional code

No “use additional code” instruction is listed for R83.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for R83.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for R83.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code R83 mean?

R83 is the FY 2027 U.S. ICD-10-CM code for “Abnormal findings in cerebrospinal fluid.”

Is R83 a billable or specific ICD-10-CM code?

No. R83 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is R83 located in ICD-10-CM?

R83 is listed in Chapter 18, Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), within Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis (R83-R89) (R83–R89), under category R83, Abnormal findings in cerebrospinal fluid.

What coding notes are listed for R83?

No inclusion terms are listed for R83 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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