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. Author manuscript; available in PMC: 2018 Aug 1.
Published in final edited form as: Med Care Res Rev. 2016 May 13;74(4):431–451. doi: 10.1177/1077558716649109

Table A3.

Characteristics of Practices With and Without NPs Based on SOP and Medicaid Reimbursement (N = 252,657).

Full SOP and 100% NP Medicaid
reimbursement, n = 15,803 (6.3%)
Full SOP only,
n = 8,282 (3.3%)
100% NP Medicaid, reimbursement
only, n= 139,011 (55.0%)
Neither full SOP nor 100% NP Medicaid
reimbursement, n = 89,561 (35.5%)
NP present,
n = 3,069
(19.4%)
No NP present,
n= 12,734
(80.6%)
NP present,
n = 1,522
(18.4%)
No NP
present, n =
6,760 (81.6%)
NP present,
n = 19,274
(13.9%)
No NP present,
n= 119,737
(86.1%)
NP present,
n= 13,528
(15.1%)
No NP present,
n = 76,033
(84.9%)
n % n % p n % n % p n % n % p n % n % p
Practice size <.001 <.001 <.001 <.001
 1-3 1,139 37.1 9,749 76.6 623 40.9 5,447 80.6 7,985 41.4 98,027 81.9 6,443 47.6 63,195 83.1
 4-9 1,360 44.3 2,309 18.1 702 46.1 1,049 15.5 8,067 41.9 17,531 14.6 5,399 39.9 10,470 13.8
 ≥10 570 18.6 676 5.3 197 12.9 264 3.9 3,222 16.7 4,179 3.5 1,686 12.5 2,368 3.1
Primary care practice 1,575 51.3 3,679 28.9 <.001 729 47.9 2,044 30.2 <.001 9,091 47.2 37,493 31.3 <.001 6,638 49.1 24,197 31.8 <.001
Medicare acceptance 2,426 79.1 9,877 77.6 .08 1,229 80.8 5,469 80.9 .89 15,580 80.8 95,659 79.9 <.01 10,754 79.5 60,893 80.1 .11
Medicaid acceptance 2,366 77.1 8,615 67.7 <.001 1,187 78.0 4,756 70.4 <.001 14,186 73.6 76,533 63.9 <.001 9,445 69.8 47,407 62.5 <.001
Rural location 293 9.6 706 5.5 <.001 126 8.3 299 4.4 <.001 1,097 5.7 3,235 2.7 <.001 1,118 8.3 2,533 3.3 <.001
High poverty 248 8.1 947 7.4 .05 348 22.9 1,496 22.1 <.05 3,060 15.9 16,704 14.0 <.001 3,285 24.3 15,128 19.9 <.001

Note. NP = nurse practitioner; SOP = scope of practice. Primary care was established based on the presence of at least two-third primary care physicians in a practice. Primary care physicians included the following: adolescent medicine, family practice, general practitioner, geriatrician, internist, and pediatrician. Practice size was calculated as the number of physicians, nurse practitioners, and physician assistants in each practice. Rural location was established using core-based statistical area (Office of Management and Budget), and high poverty was defined as at least 20% of the county population living in poverty. Percentages may not add to 100 because of rounding.