My husband received a RMD in amt of $174.20 from a small IRA account. We did not receive a 1099R . Is there a minimum amt required to generate a 1099R?

No, there is not a minimum amount required to generate a Form 1099-R.  

You will need to contact the Institution that administers the IRA Account for your Husband to request they send you Form 1099-R for the IRA Distribution.  If you have online access to his account, you should be able to print it from there as well.