Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis (R83-R89) ICD-10-CM
The R83–R89 section covers abnormal findings on examination of other body fluids, substances and tissues, without diagnosis with 109 ICD-10-CM diagnosis codes, of which 93 are billable in fiscal year 2026. The section is organized into the 7 code ranges listed below.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- abnormal findings on antenatal screening of mother O28
- diagnostic abnormal findings classified elsewhere - see Alphabetical Index
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Code Ranges in This Section 7 ranges · 109 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the R83–R89 Code Range
ICD-10 codes R83 through R89 cover a range of abnormal findings detected in body fluids, tissues, and specimens from various organs, without a confirmed diagnosis. These codes are specifically used to document abnormal test results from fluids like cerebrospinal fluid, respiratory secretions, digestive and genital specimens, as well as other bodily tissues.
This code range includes detailed subcategories addressing abnormal enzyme, hormone, drug, immunological, microbiological, cytological, and histological findings in samples such as cerebrospinal fluid (R83), respiratory specimens (R84), digestive tract samples (R85), male genital specimens (R86), female genital specimens (R87), other body fluids (R88), and various other organs and tissues (R89). For example, terms like "CSF polymorphonuclear leukocytosis" correspond to abnormal cytological findings in cerebrospinal fluid under R83.6, while "Atypical squamous cells of undetermined significance on cytologic smear of cervix (ASC-US)" relate to R87.610. These codes help clearly communicate specific abnormal lab findings—such as abnormal microbiological cultures, HPV DNA test results, or unusual immunological markers—when a diagnosis has not yet been established. This classification supports precise medical documentation and follow-up testing recommendations across many specialties, ensuring clarity when working with laboratory abnormalities identified in diverse clinical specimens.
Questions About This Page
How many codes are in the R83-R89 range?
The R83-R89 range contains 109 ICD-10-CM diagnosis codes in FY 2026. 93 of them are billable, and the rest are category headers that organize the section.
What conditions does R83-R89 cover?
The range covers abnormal findings on examination of other body fluids, substances and tissues, without diagnosis. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
