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R83 ICD-10-CA category: Abnormal findings in cerebrospinal fluid

R83 isn’t a code on its own. Choose one of the 9 codes beneath it, the one the documentation supports.

Official description

R83

Abnormal findings in cerebrospinal fluid

ICD-10-CA · Canada

Codes in R83

R83 isn’t a code on its own. Open the code that matches what the note documents.

R83.0Abnormal findings in cerebrospinal fluid, abnormal level of enzymesR83.2Abnormal findings in cerebrospinal fluid, abnormal level of other drugs, medicaments and biological substancesR83.3Abnormal findings in cerebrospinal fluid, abnormal level of substances chiefly nonmedicinal as to sourceR83.4Abnormal findings in cerebrospinal fluid, abnormal immunological findingsR83.5Abnormal findings in cerebrospinal fluid, abnormal microbiological findingsR83.6Abnormal findings in cerebrospinal fluid, abnormal cytological findingsR83.7Abnormal findings in cerebrospinal fluid, abnormal histological findingsR83.8Abnormal findings in cerebrospinal fluid, other abnormal findingsR83.9Abnormal findings in cerebrospinal fluid, unspecified abnormal finding

Notes for R83

As CIHI prints them, with any note R83 takes from the headings above it.

Excludes

Conditions classified elsewhere.

  • Abnormal findings on:• antenatal screening of mother (O28.-)• examination of• blood, without diagnosis (R70-R79)• urine, without diagnosis (R80-R82)diagnostic abnormal findings classified elsewhere - see Alphabetical IndexFrom R83-R89 Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
  • Abnormal findings on antenatal screening of mother (O28.-)certain conditions originating in the perinatal period (P00-P96)From Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

Note

  • Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated "not otherwise specified", "unknown etiology" or "transient". The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.The conditions and signs or symptoms included in categories (R00-R99) consist of:(a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;(b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;(c) provisional diagnoses in a patient who failed to return for further investigation or care;(d) cases referred elsewhere for investigation or treatment before the diagnosis was made;(e) cases in which a more precise diagnosis was not available for any other reason;(f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.From Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

Where R83 sits

  1. 1ChapterChapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
  2. 2Block R83-R89Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
  3. 3Category R83Abnormal findings in cerebrospinal fluid

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See R83 in the CIHI source

Frequently asked questions

Is R83 a valid ICD-10-CA code?

No. R83 (Abnormal findings in cerebrospinal fluid) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 9 codes; record the one the documentation supports.

Where is R83 in ICD-10-CA?

R83 sits under R83-R89 Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis, within Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99).

What coding notes apply to R83?

ICD-10-CA lists Excludes, Note notes for R83, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside R83

R84Abnormal findings in specimens from respiratory organs and thoraxR85Abnormal findings in specimens from digestive organs and abdominal cavityR86Abnormal findings in specimens from male genital organsR87Abnormal findings in specimens from female genital organsR89Abnormal findings in specimens from other organs, systems and tissues