Table 4: Comparison of physician-submitted claims with diagnoses recorded on patient charts (n = 849), by positive predictive value (PPV)
Physician characteristicCharts filled out by physicians reimbursed by FFSn = 447Charts filled out by physicians reimbursed by APPn = 402p value
No. of claims submitted*PPV, %No. of claims submitted*PPV, %
Overall389 87.0345 85.8< 0.001
Physician specialty
Surgery240 90.011 92.0< 0.001
Internal medicine91 76.5176 81.0< 0.001
Neurology/neurosurgery--82 93.2-
Pediatrics28 82.476 91.0< 0.001
Psychiatry30 100---

Note: APP = alternative payment plan, FFS = fee-for-service payment plan. Claims were submitted by 182 unique physicians.

*We did not report PPVs for other specialties, such as intensive care unit physicians, hospitalists and psychiatrists.