Hi Priyanka,

Yes that is what Lizzie meant in her answer. I hope that helps.

Thank you,

James

lizziedy quoting the Solution:  "If you look at 1/1/2012 and subtract 13 months, you get 12/1/2012. So 12/1/2012 is not <= 12 months before 1/1/2012 (it is 13 months before). However, 12/2/2012 is within the 12th month, just at the very end of it, so it is considered <= 12 months before 1/1/2012. "

Do you mean: " If you look at 1/1/2012 and subtract 13 months, you get 12/1/2010. So 12/1/2010 is not <= 12 months before 1/1/2012 (it is 13 months before). However, 12/2/2010 is within the 12th month, just at the very end of it, so it is considered <= 12 months before 1/1/2012. "

Hi Priyanka,

The Bonnie definition isn't strictly "x months + 29 days". That happened to be the case in the last ticket because the months in question were 30 days long. The way Bonnie does month calculations is to add or subtract the relevant number of months.

In this scenario, the two examples are:

"12/2/2010 <= 12 months before 1/1/2012" -> true

and

"12/1/2012 <= 12 months before 1/1/2012" -> false

If you look at 1/1/2012 and subtract 13 months, you get 12/1/2012. So 12/1/2012 is not <= 12 months before 1/1/2012 (it is 13 months before). However, 12/2/2012 is within the 12th month, just at the very end of it, so it is considered <= 12 months before 1/1/2012.

For a more detailed explanation of timing calculations within QDM 4.3, please see the documentation here: https://ecqi.healthit.gov/system/files/qdm_4_3_508_compliant.pdf. The explanation starting on page 63 will be helpful.

Let us know you if you have further questions.

Thank you,
Lizzie

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