The 'ContactPhoneNum' element is invalid.

The full error is here:

The 'ContactPhoneNum' element is invalid - The value is invalid according to its datatype - The Pattern constraint failed.

Our Explanation: The contact phone number is a 10-15 digit number associated with the provider of the coverage that the IRS can contact if there are questions about the submission. The 1095 software will strip out hyphens and just use digits. The contact phone number is optional.