Household data are collected as of March. As stated in the Census's Source and Accuracy of Estimates for Income, Poverty, and Health Insurance Coverage in the United States: 2011 (http://www.census.gov/hhes/www/p60_243sa.pdf) Estimation of Median Incomes. The Census Bureau has changed the methodology for computing median income over time.
Coding CAD. The ICD-9-CM diagnosis codes for CAD are classified to subcategory 414.0x. Coding CAD requires documentation of the coronary artery involved and whether or not it is of a native artery, an artery of a transplanted heart, or a bypass graft. The fifth-digit subclassification identifies the coronary artery involved.
In other words, ICD codes explain to the insurance payer why the doctor performed a certain procedure. The code thatâs currently in use in the United States is the Ninth Revision, Clinical Modification, or ICD-9-CM. ICD-9, the code set on which ICD-9-CM is based, was published in 1978. It was adapted for use in the United States in the same year. Note that ICD-9-CM is used only in the United States.