All ICD10 Codes
R90Non-billable

Abnormal findings on diagnostic imaging of central nervous system

Symptoms, Signs and Abnormal Clinical and Laboratory Findings·Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94)·category·FY 2026

Use a more specific code (1 billable, 1 non-billable)
R90.0Intracranial space-occupying lesion found on diagnostic imaging of central nervous systemR90.8Other abnormal findings on diagnostic imaging of central nervous systemhas subcodes

CH18 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • abnormal findings on antenatal screening of mother (O28.-)
  • certain conditions originating in the perinatal period (P04-P96)
  • signs and symptoms classified in the body system chapters
  • signs and symptoms of breast (N63, N64.5)

R90-R94 Parent Instructions

Includes
  • 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

Clinical Hierarchy

BillableHas subcodes
CH18Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
R90-R94Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94)
R90Abnormal findings on diagnostic imaging of central nervous systemNot billable
R90.0Intracranial space-occupying lesion found on diagnostic imaging of central nervous systemBillable
R90.8Other abnormal findings on diagnostic imaging of central nervous systemSubcodes

MS-DRG Classification

2026

No direct MS-DRG triggers identified.