Table 1.

The column “Medicare count” shows the number of unique practitioners in the CMS. The column “AAMC Count” shows the number of medical practitioners by specialty as determined by the American Association of Medical Colleges in 2013 [Reference [63]. The column “Percentage covered” is the percentage of the AAMC count covered by the current Medicare dataset for the given medical specialties. A few chosen specialties show that the CMS dataset is representative of more than 75% of all medical graduates for several specialties

Specialty	Medicare count	AAMC count	Percentage covered
Internal medicine	96,975	111,047	87.33%
Family practice	81,901	108,917	75.20%
Anesthesiology	35,667	40,758	87.51%
Obstetrics/gyn.	31,399	40,826	76.91%