Table 1. Characteristics of Physician Practices Interviewed to Assess Costs of Participating in the Medicare Merit-based Incentive Payment System (MIPS), 2019.

Practice type	Practices, No. (%)	Mean size (No. of physicians)a	Mean No. of APPs	Medicare share, mean, %b	Mean sites	No. of MIPS APM practices
Overall	30 (100)	31.5	17.5	21.9	4.9	14
APM status
APM	14 (46.7)	23.9	8.4	21.6	4.3	NA
Non–APM	16 (53.3)	38.2	25.4	22.2	5.5	NA
Primary care practice
Small	9 (30.0)	4.1	2.4	22.4	1.0	6
Medium	4 (13.3)	12.0	3.8	19.4	1.7	2
General surgery practice
Small	6 (20.0)	5.8	2.0	22.7	1.3	3
Medium	4 (13.3)	19.0	7.8	27.8	9.0	1
Large multispecialty practice	7 (23.3)	107.0	63.6	18.6	13.7	2

Abbreviations: APM, alternative payment model; APPs, advanced practice practitioners; NA, not applicable.

Standard deviations are shown in the Supplement.

^a Mean size was defined as the number of individual physicians in the practice.

^b Medicare share indicates the proportion of patients covered by or revenue from Medicare fee-for-service.