@article {11817, title = {Development, Validation, and Performance of a New Physical Functioning{\textendash}Weighted Multimorbidity Index for Use in Administrative Data}, journal = {Journal of General Internal Medicine}, volume = {36}, year = {2021}, pages = {2427{\textendash}2433}, keywords = {Medicaid, Medicare, multimorbidity index, physical functioning}, doi = {10.1007/s11606-020-06486-7}, author = {Melissa Y Wei and Jamie E Luster and Ratz, David and Kenneth J Mukamal and Kenneth M. Langa} }