EEG -DOS read date?

is it correct that a EEG should be billed on the read date and not the date of the placement of the device? If so can I get some links to this informtion as well. Thank you

re: EEG -DOS read date?

beleive I answered my own questions

http://www.hbma.org/uploads/content_files/Transmittal1873-POS-DOS.pdf

10.6.3 - Date of Service (DOS) Instructions for the Interpretation and Technical Component of Diagnostic Tests
(Rev. 1873, Issued: 12-11-09, Effective: 01-04-10, Implementation: 07-01-10)
The appropriate DOS for the professional component is the actual calendar date that the interpretation was performed. For example, if the test or technical component was performed on April 30th and the interpretation was read on May 2nd, the actual calendar date or DOS for the performance of the test is April 30th and the actual calendar date or DOS for the interpretation or read of the test is May 2nd.