- B502 Intracranial Sinuses
- B5020 High Osmolar
- B5020Z None
- B5020ZZ Plain Radiography of Intracranial Sinuses using High Osmolar Contrast
- B5020Z None
- B5021 Low Osmolar
- B5021Z None
- B5021ZZ Plain Radiography of Intracranial Sinuses using Low Osmolar Contrast
- B5021Z None
- B502Y Other Contrast
- B502YZ None
- B502YZZ Plain Radiography of Intracranial Sinuses using Other Contrast
- B502YZ None
- B5020 High Osmolar