Code the reason the patient did not receive radiation treatment as part of first course of therapy. See also RX--Regional RX Modality [1570].

0	Radiation therapy was administered.
1	Radiation therapy was not administered because it was not part of the planned first-course treatment. Diagnosed at autopsy.
2	Radiation therapy was not administered because it was contraindicated due to patient risk factors (comorbid conditions, advanced age, etc).
5	Radiation therapy was not administered because the patient died prior to planned or recommended treatment.
6	Radiation therapy was not administered; it was recommended by the patient's physician, but was not administered as part of the first-course therapy. No reason was noted in the patient's record.
7	Radiation therapy was not administered; it was recommended by the patient's physician, but this treatment was refused by the patient, the patient's family member, or the patient's guardian. The refusal was noted in the patient record.
8	Radiation therapy was recommended, but it is unknown if it was administered.
9	It is unknown if radiation therapy was recommended or administered. Death-certificate-only.