The Centers for Medicare & Medicaid Services (CMS) is responsible for administering the Medicare program throughout the United States.
In order to ensure that services paid for by the Medicare program are indeed medically necessary, CMS has identified laboratory tests that require medical necessity documentation.
These National Coverage Determination (NCD's) and Local Coverage Determination (LCDs) policies and applicable ICD-9 codes can be found at the websites listed below.
National Coverage Determinations as of July 2013 click here
CT: Local Coverage Determinations as of July 2013 click here