There are a couple of different options here. If you would like to continue using one email address for both yourself and your spouse, you could ask your doctor to set up a caregiver/dependent relationship within the application. It will not affect your patient care at all but will allow you to share a sign-in email and request visits for each of you within one account.
If you would prefer to keep your accounts separate, you will need to use two separate email addresses. The verification code will still work even if you use a different email than the one it was sent to.