DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

R90 Abnormal findings on diagnostic imaging of central nervous system

  • Header · not billable

R90 is not billable. The category heads 4 billable codes in FY2027, grouped under 2 subdivisions.

Index → code

  • Disease, diseasedwhite matter → R90.82
  • Abnormal, abnormality, abnormalitiesechoencephalogram → R90.81
  • Lesion(s) (nontraumatic)intracranial, space-occupying → R90.0

Where it sits

  1. Chapter 18 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
  2. R90-R94 Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94)
  3. R90 Abnormal findings on diagnostic imaging of central nervous system
Billable codes
4
Subdivisions
2
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
5

Codes in R90

  1. R90.0
    Intracranial space-occupying lesion found on diagnostic imaging of central nervous system
    Billable
  2. R90.8
    Other abnormal findings on diagnostic imaging of central nervous system
    Header
  3. R90.81
    Abnormal echoencephalogram
    Billable
  4. R90.82
    White matter disease, unspecified
    Billable
  5. R90.89
    Other abnormal findings on diagnostic imaging of central nervous system
    Billable
    Inclusion terms 1

    Inclusion terms

    • Other cerebrovascular abnormality found on diagnostic imaging of central nervous system

Sources of each column.

Instructions

Notes that also apply

Block R90-R94 instructions (Includes 6, Excludes1 2): printed on the block page.

Chapter 18 instructions (Notes 9, Excludes2 4): printed on the chapter 18 page.

Index entries

  • Lesion(s) (nontraumatic)intracranial, space-occupying → R90.0
  • Abnormal, abnormality, abnormalitiesechoencephalogram → R90.81
  • Disease, diseasedwhite matter → R90.82
  • Abnormal, abnormality, abnormalitiesdiagnostic imagingcentral nervous system NEC → R90.89
  • Abnormal, abnormality, abnormalitiesdiagnostic imagingcerebrovascular NEC → R90.89

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy