Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94) ICD-10-CM
The R90–R94 section covers abnormal findings on diagnostic imaging and in function studies, without diagnosis with 85 ICD-10-CM diagnosis codes, of which 64 are billable in fiscal year 2027. The section is organized into the 5 code ranges listed below.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- nonspecific abnormal findings on diagnostic imaging by computerized axial tomography [CAT scan]
- nonspecific abnormal findings on diagnostic imaging by magnetic resonance imaging [MRI][NMR]
- nonspecific abnormal findings on diagnostic imaging by positron emission tomography [PET scan]
- nonspecific abnormal findings on diagnostic imaging by thermography
- nonspecific abnormal findings on diagnostic imaging by ultrasound [echogram]
- nonspecific abnormal findings on diagnostic imaging by X-ray examination
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
Code Ranges in This Section 5 ranges · 85 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the R90–R94 Code Range
These codes describe abnormal imaging findings and function study results when no diagnosis is identified. The imaging categories separate findings by body area.
R90 covers central nervous system imaging, including a finding that takes up space inside the skull. R91 covers lung imaging and distinguishes a single lung nodule from other nonspecific findings. R92 covers breast imaging, separating calcifications, density, inconclusive mammograms and other findings.
R93 groups imaging findings in other body structures by site. It also includes imaging that is inconclusive because of excess body fat. R94 groups abnormal function study results by the organ or system tested, including the nervous system, lungs, heart, kidneys, liver and thyroid.
Questions About This Page
How many codes are in the R90-R94 range?
The R90-R94 range contains 85 ICD-10-CM diagnosis codes in FY 2027. 64 of them are billable, and the rest are category headers that organize the section.
What conditions does R90-R94 cover?
The range covers abnormal findings on diagnostic imaging and in function studies, 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 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
