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. Author manuscript; available in PMC: 2017 Aug 1.
Published in final edited form as: Epilepsy Res. 2016 May 18;124:55–62. doi: 10.1016/j.eplepsyres.2016.05.001

Table 3.

Frequency of intraoperative ECoG usage from Medicare Part B, 2004–2013, and from NSQIP, 2005–2013.

Procedure Medicare Part B
 NSQIP
Number of Procedures Frequencyb Number of Procedures Frequency
Excision of epileptic focus
    Without ECoG 208 35.8 11 23.4
    With ECoG 403 64.2 36 76.6
Temporal lobectomy
    Without ECoGa 1635 64.2 177 63.0
    With ECoG 913 35.8 104 37.0
Other lobectomy
    Without ECoGa 365 68.5 54 60.0
    With ECoG 168 31.5 36 40.0
a

CPT code introduced in 2004.

b

Starting in 2009, data were censored if less than 11 procedures were recorded in a given year. This affected the code 61534 in 2013 only. Therefore the frequency for ECoG use for excision of epileptic foci (not for temporal lobectomy) was calculated from 2004 to 2012. Temporal lobectomy ECoG use was calculated from 2004 to 2013.