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.
Documentation specificity under the ICD-10-CM system for coronary artery disease (CAD) with and without angina is crucial for accurate classification of these disease processes. Combination codes including CAD with and without angina will exist under the new coding system.
There may be more than one ICD 9 code associated with each CPT code. The CMS 1500 form can accommodate up to 4 ICD 9 codes in box 21 of the form as referenced by the diagnosis pointer in box 24E. Here's some links to free references for CPT medical coding and ICD 9 codes from reputable sites.