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. Author manuscript; available in PMC: 2011 Oct 1.
Published in final edited form as: Am J Phys Med Rehabil. 2010 Oct;89(10):781–794. doi: 10.1097/PHM.0b013e3181f1c83a

Figure 8.

Figure 8

Relative proportions of CMG comorbidity tier assignment under the prospective payment system by discharge year. Yearly summaries represent fiscal year periods (Oct 1 through Sep 30) from the Centers for Medicare and Medicaid Services. The CMG comorbidity tier system changed over the years.