Table 1.

Identification and Validation Logic

Transgender Medicare Beneficiaries
	No. identified	No. validated	% validated
ICD-9 diagnosis codes 302.50, 302.51, 302.52, 302.53, 302.6, 302.85a	4098	3658	89.26
Validation method
ICD-9 302 series diagnosis code and 1 or more of the following:

	No. validated	% validated
More than 1 claim with an ICD-9 302 series diagnosis code in 2013	2706	66.03
1 or more claims with an ICD-9 302 series diagnosis code in 2012	1577	38.48
1 or more claims with an ICD-9 302 series diagnosis code in 2014	1937	47.26
1 or more claims with an ICD-9 259.9 diagnosis code in 2013	568	13.86
1 or more prescriptions for a sex hormone in 2013	2005	48.89
Principal diagnosis code is from ICD-9 302 series	1736	42.36
1 or more CC 45 modifier	167	4.08
1 or more KX modifier	26	0.6

Each validation step is calculated independently from all other validation steps, and “% validated” is calculated from the total number of transgender beneficiaries identified (N=4098).

^aReferred to as the 302 series for the purposes of this table.

ICD-9, International Classification of Diseases ninth edition.