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. Author manuscript; available in PMC: 2015 Aug 3.
Published in final edited form as: JAMA. 2015 Feb 3;313(5):496–504. doi: 10.1001/jama.2015.25

Table 5.

Medicare payments before vs. after enrolling in the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) compared to Non-ACS-NSQIP matched control hospitals. Pre-enrollment payments represent mean payments over the three years prior to enrollment.

ACS-NSQIP
Hospitals
Non-ACS-
NSQIP
Control
Hospitals
Difference in Average Medicare Payments After
Enrollment vs. Before in ACS-NSQIP Hospitals
(95% CI)
Difference in Average Medicare Payments in
NSQIP Hospitals vs. Non-ACS-NSQIP Control
Hospitals After Enrollment
(95% CI)*
N=217,324 N=404,663 N=430,179 N=1,226,497

Pre-enrollment Post-enrollment Post-enrollment

Year 1 Year 2 Year 3 Year 1 Year 2 Year 3
Total payments, mean $20,529 $18,740 $642 (280,1003) $879 (377,1382) $1058 (414,1703) $166 (−78,410) $180 (−88,449) $40 (−268,348)

Payments for index admission, mean $18,746 $17,168 $534 (219,848) $815 (378, 253) $957 (396,518) $54 (−163,272) $123 (−103,349) −$11 (−278,257)

Payments for readmissions
% with readmission 14.7 13.2 15.2 15.0 15.0
Payment, mean $12,124 $11,889 −$12 (−497, 473) −$154 (−738, 431) −$268 (−897, 360) $95 (−405,596) $201 (−339, 740) $245 (−231, 721)

Payments for outliers
% with outlier payment 6.0 5.1 7.0 7.2 7.4
Payment, mean $23,507 $20,153 $1625 (215, 3035) $3391 (1662, 5120) $2872 (740, 5004) $454 (−961,1868) $1459 (−48, 2965) −$86 (−1666, 1495)
*

All models are adjusted for patient characteristics, comorbidities, year of surgery, procedure type and hospital characteristics.