Table 2.

Sensitivity of national pulmonary nontuberculous mycobacterial disease cases^* and cost^† estimates to ICD-9 undercoding and proportion of patients aged <65 years

	Proportion of Cases Coded for Pulmonary Nontuberculous Mycobacterial Disease per ICD-9 (031.0)
Proportion of patients aged <65 yr	27%	50%	75%
25%	79,344 ($749,890,795)	42,687 ($403,441,248)	28,458 ($268,960,832)
31%	86,244 ($815,098,690)	46,399 ($438,523,095)	30,933 ($292,348,730)
35%	91,551 ($865,258,610)	49,254 ($465,509,132)	32,836 ($310,339,421)

Definition of abbreviations: ICD-9 = International Classification of Diseases, 9th Revision.

^*Case numbers reflect year 2010 estimates.

^†Costs are presented in constant 2014 dollars.