R90.0 vs R93.0
R90.0 and R93.0 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
Intracranial space-occupying lesion found on diagnostic imaging of central nervous system
- Chapter 18
- Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
- Section
- R90-R94
- Lesion › intracranial, space-occupying
Abnormal findings on diagnostic imaging of skull and head, not elsewhere classified
- Chapter 18
- Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
- Section
- R90-R94
- Cistern, subarachnoid
- Cyst › subarachnoid intrasellar
- Enlargement, enlarged › pituitary fossa
- Enlargement, enlarged › sella turcica
- Findings, abnormal, inconclusive, without diagnosis › pneumoencephalogram
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027