Table 1.

Agreement in Medicare coding for digital technologies, 2001 to 2003

Presence of codes by claims file, n (%)Digital mammography (n = 57,632 mammograms)CAD (n = 55,916 mammograms)
Outpatient file only296 (0.5)840 (1.5)
Carrier claims only237 (0.4)1,175 (2.1)
Both files1,183 (2.1)5,359 (9.6)
Neither file55,916 (97.0)48,542 (86.8)
Concordance (%)99.196.4
κ (95% CI)0.81 (0.80-0.83)*0.82 (0.81-0.83)*