R90.0Intracranial space-occupying lesion found on diagnostic imaging of central nervous system

R90.0 is the ICD-10-CM diagnosis code for intracranial space-occupying lesion found on diagnostic imaging of central nervous system. It belongs to category R90 (abnormal findings on diagnostic imaging of central nervous system), block R90-R94 (abnormal findings on diagnostic imaging and in function studies, without diagnosis) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within R90 (abnormal findings on diagnostic imaging of central nervous system), R90.0 is specifically for intracranial space-occupying lesion found on diagnostic imaging of central nervous system. Related codes cover other abnormal findings on diagnostic imaging of central nervous system (R90.8).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 606 (Minor Skin Disorders with MCC, relative weight 1.5728) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 784.2 (swelling, mass, or lump in head and neck).