Table 1.

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

Specialty	Drugs Prescribed, Mean No.	Procedure Codes, Mean No.	Train, n (%)	Test, n (%)
Allergy/immunology	12.9	8.7	1,611 (0.6)	1,625 (0.6)
Anesthesiology	16.4	7.4	16,087 (5.7)	16,110 (5.7)
Cardiology	38.1	21.3	11,465 (4.1)	11,170 (4.0)
Dermatology	12.8	17.3	5,609 (2.0)	5,498 (1.9)
Emergency medicine	8.6	5.5	18,689 (6.6)	18,663 (6.6)
Endocrinology	31.7	9.7	2,376 (0.8)	2,497 (0.9)
Gastroenterology	16.2	13.2	5,999 (2.1)	5,960 (2.1)
Hematology-oncology	19.2	18.5	5,638 (2.0)	5,572 (2.0)
Infectious disease	21.8	7.0	2,337 (0.8)	2,328 (0.8)
Nephrology	36.6	13.3	3,735 (1.3)	3,691 (1.3)
Neurology	27.4	9.4	6,431 (2.3)	6,217 (2.2)
Neurosurgery	5.1	8.8	1,976 (0.7)	2,008 (0.7)
Obstetrics and gynecology	5.4	4.6	11,361 (4.0)	11,505 (4.1)
Ophthalmology	13.7	13.2	8,837 (3.1)	8,755 (3.1)
Orthopedic surgery	5.9	13.5	10,980 (3.9)	11,095 (3.9)
Otolaryngology	9.9	10.5	4,322 (1.5)	4,262 (1.5)
Pathology	5.6	10.2	4,682 (1.7)	4,831 (1.7)
Physical medicine and rehabilitation	14.5	10.6	3,610 (1.3)	3,438 (1.2)
Plastic surgery	3.1	5.7	1,864 (0.7)	1,795 (0.6)
Primary care	61.4	11.7	100,682 (35.6)	101,498 (35.9)
Psychiatry	20.9	4.0	15,075 (5.3)	14,974 (5.3)
Pulmonology	22.8	12.7	5,282 (1.9)	5,395 (1.9)
Radiation oncology	3.5	14.5	1,926 (0.7)	1,903 (0.7)
Radiology	4.3	35.7	11,840 (4.2)	11,816 (4.2)
Rheumatology	33.4	15.1	1,975 (0.7)	2,030 (0.7)
Surgery	5.1	9.2	13,536 (4.8)	13,278 (4.7)
Urology	17.3	20.1	4,568 (1.6)	4,579 (1.6)
Total			282,493 (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