Table 1

Prescriptions and Procedures and Comparison of Train and Test Data Sets, by Specialty

SpecialtyDrugs Prescribed, Mean No.Procedure Codes, Mean No.Train, n (%)Test, n (%)
Allergy/immunology12.98.71,611 (0.6)1,625 (0.6)
Anesthesiology16.47.416,087 (5.7)16,110 (5.7)
Cardiology38.121.311,465 (4.1)11,170 (4.0)
Dermatology12.817.35,609 (2.0)5,498 (1.9)
Emergency medicine8.65.518,689 (6.6)18,663 (6.6)
Endocrinology31.79.72,376 (0.8)2,497 (0.9)
Gastroenterology16.213.25,999 (2.1)5,960 (2.1)
Hematology-oncology19.218.55,638 (2.0)5,572 (2.0)
Infectious disease21.87.02,337 (0.8)2,328 (0.8)
Nephrology36.613.33,735 (1.3)3,691 (1.3)
Neurology27.49.46,431 (2.3)6,217 (2.2)
Neurosurgery5.18.81,976 (0.7)2,008 (0.7)
Obstetrics and gynecology5.44.611,361 (4.0)11,505 (4.1)
Ophthalmology13.713.28,837 (3.1)8,755 (3.1)
Orthopedic surgery5.913.510,980 (3.9)11,095 (3.9)
Otolaryngology9.910.54,322 (1.5)4,262 (1.5)
Pathology5.610.24,682 (1.7)4,831 (1.7)
Physical medicine and rehabilitation14.510.63,610 (1.3)3,438 (1.2)
Plastic surgery3.15.71,864 (0.7)1,795 (0.6)
Primary care61.411.7100,682 (35.6)101,498 (35.9)
Psychiatry20.94.015,075 (5.3)14,974 (5.3)
Pulmonology22.812.75,282 (1.9)5,395 (1.9)
Radiation oncology3.514.51,926 (0.7)1,903 (0.7)
Radiology4.335.711,840 (4.2)11,816 (4.2)
Rheumatology33.415.11,975 (0.7)2,030 (0.7)
Surgery5.19.213,536 (4.8)13,278 (4.7)
Urology17.320.14,568 (1.6)4,579 (1.6)
Total282,493 (100)282,493 (100)
  • Note: Prescribing data are from the 2014-2016 Centers for Medicare and Medicaid Services (CMS) Medicare Fee-For-Service Provider Utilization and Payment Data: Part D Prescriber Public Use Files.19 Procedure data are from 2014-2016 CMS Medicare Fee-For-Service Provider Utilization and Payment Data: Physician and Other Supplier Public Use Files.20