R93.0Abnormal findings on diagnostic imaging of skull and head, not elsewhere classified

R93.0 is the ICD-10-CM diagnosis code for abnormal findings on diagnostic imaging of skull and head, not elsewhere classified. It belongs to category R93 (abnormal findings on diagnostic imaging of other body structures), 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 R93 (abnormal findings on diagnostic imaging of other body structures), R93.0 is specifically for abnormal findings on diagnostic imaging of skull and head, not elsewhere classified. Related codes cover abnormal findings on diagnostic imaging of heart and coronary circulation (R93.1), abnormal findings on diagnostic imaging of liver and biliary tract (R93.2), abnormal findings on diagnostic imaging of other parts of digestive tract (R93.3), abnormal findings on diagnostic imaging of urinary organs (R93.4), abnormal findings on diagnostic imaging of other abdominal regions, including retroperitoneum (R93.5), abnormal findings on diagnostic imaging of limbs (R93.6), abnormal findings on diagnostic imaging of other parts of musculoskeletal system (R93.7), abnormal findings on diagnostic imaging of other specified body structures (R93.8) and 1 more.

Don't report R93.0 together with the conditions in its Excludes1 note: intracranial space-occupying lesion found on diagnostic imaging (R90.0).

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 091 (Other Disorders of Nervous System with MCC, relative weight 1.7046), DRG 092 (Other Disorders of Nervous System with CC, relative weight 1.0239) and DRG 093 (Other Disorders of Nervous System without CC/MCC, relative weight 0.7783), in MDC 01 (Diseases and Disorders of the Nervous System), 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 793.0 (nonspecific (abnormal) findings on radiological and other examination of skull and head).