Is it considered a contribution to an IRA when the money was transferred to my IRA from my ex-husbands IRA

[DianeW777]

No, it is not a new contribution for you. This would simply be a rollover from your ex-husbands IRS to your IRA. The Form 1099-R, if you have one, should be coded as a rollover or you can make that selection when asked. 

A rollover must be completed either in a Trustee-to-Trustee transfer, in which case a 1099-R may not be issued; OR it came through your hands and was required to be put into your IRA within 60 days. The latter would trigger a Form 1099-R.

• Where do I report an IRA rollover?

[dmertz]

It's a nonreportable transfer, not a rollover.  (A transfer of an IRA is not a rollover.)  Nothing about the transfer is reportable on your tax return.