Table 1.

Definition of the clinical classification software (CCS) diagnosis categories in the Medical Expenditure Panel Survey

CCS diagnosis categories	ICD-9-CM diagnosis codes	Definition
aChronic Kidney Disease (CKD)
158	585, 5853, 5854, 5855, 5856, 5859	CKD
Cancer
14	1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1590 2303 V1005	Colon Cancer
24	1740 1741 1742 1743 1744 1745 1746 1748 1749 1750 1759 2330 V103	Breast Cancer
19	1622 1623 1624 1625 1628 1629 2312 V1011	Lung Cancer
Stroke
109	430 431 4320 4321 4329 43301 43311 43321 43331 43381 43391 4340 43400 43401 4341 43410 43411 4349 43490 43491 436	Acute cerebrovascular disease
112	4350 4351 4352 4353 4358 4359	Transient cerebral ischemia

^aPersons receiving dialysis were excluded