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.
Notice that the ICD-9-CM code is a straight numerical codes. Adopting ICD-9-CM meant that diagnosis and treatment codes were now in a common language, allowing medical billing to be. It is worth noting that while ICD-9-CM holds approximately 12,000 codes, ICD-10-CM utilizes in excess of 100,000 codes. For years, Carol Buck's approach to ICD-9-CM and HCPCS has been respected by thousands of students and educators in medical coding, billing and reimbursement.