Appendix. Definition of Aggressive Care Measures in Last 30 Days of Life in SEER-Medicare Cohort^*

	International Classification of Diseases 9th Revision Diagnosis Code	Procedure	Healthcare Common Procedure Coding System	Other
Chemotherapy	V07.39, V58.1, V58.11, V58.12, 999.81	99.25, 00.10, 00.15, 99.28	96401, 96402, 96405, 96406, 96408, 96409, 96410, 96411, 96412, 96413, 96414, 96415, 96416, 96417, 96420, 96422, 96423, 96425, 96440, 96445, 96446, 96450, 96520, 96521, 96522, 96523, 96530, 96542, 96545, 96549
Mechanical ventilation	518.5, 518.51, 518.53, 518.81, 518.83, 518.84, V44.0, V55.0, V46.13, V46.1, V46.11	96.04, 96.70, 96.71, 96.72, 31.1, 31.2, 31.21, 31.29
ICU admission				Any claim in the MedPAR file where either the ICU or coronary care indicator codes is not blank
No hospice				No claims in the Medicare Hospice file
>1 inpatient admission				Any claim in the MedPAR file not for SNF
CPR use			92950

^* Unless otherwise specified, measures were assessed using the following Medicare claims files: MedPAR, Outpatient Facility, Carrier, Hospice, Home Health Agency, Durable Medical Equipment.