Abnormal findings on diagnostic imaging of central nervous system
In Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94), chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings
4 billable codes under R90: none are a CC or MCC; none map to an HCC.
Advertisements
Instructional notes
Also applies, from Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94)
These notes sit on R90-R94 and apply to every code under it, including R90.
Includes: conditions that are coded here
- 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
Excludes1: not coded here, use a different code
- abnormal findings on antenatal screening of mother (O28.-)
- diagnostic abnormal findings classified elsewhere - see Alphabetical Index
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers when to report symptom, sign, and abnormal finding codes (R00-R99), plus specific rules for falls, coma scales, non-infectious SIRS, death NOS, and NIHSS scores.
- Use of symptom codes (page 75)
- Use of a symptom code with a definitive diagnosis code (page 75)
- Combination codes that include symptoms (page 75)
- Repeated falls (page 76)
- Coma (page 76)
- Functional quadriplegia (page 76)
- SIRS due to Non-Infectious Process (page 77)
- Death NOS (page 77)
All codes under R90
R90 can't be used on a claim. Pick a billable code below; grey headings group them.
- R90.0Intracranial space-occupying lesion found on diagnostic imaging of central nervous system
- R90.8Other abnormal findings on diagnostic imaging of central nervous system
- R90.81Abnormal echoencephalogram
- R90.82White matter disease, unspecified
- R90.89Other abnormal findings on diagnostic imaging of central nervous system
R90 MS-DRGs
As the principal diagnosis, the billable codes under R90 group to these 7 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 091 Other Disorders of Nervous System with MCC (2 of 4 codes)
- DRG 092 Other Disorders of Nervous System with CC (2 of 4 codes)
- DRG 093 Other Disorders of Nervous System without CC/MCC (2 of 4 codes)
- DRG 606 Minor Skin Disorders with MCC (1 of 4 codes)
- DRG 607 Minor Skin Disorders without MCC (1 of 4 codes)
- DRG 947 Signs and Symptoms with MCC (1 of 4 codes)
- DRG 948 Signs and Symptoms without MCC (1 of 4 codes)
Other codes that refer to R90
Notes on these codes point to R90.
- R22 Excludes1: abnormal findings on diagnostic imaging (R90-R93)
Code history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.