The doc likely thinks he's calling upon your husband's support network,
or is trying to set-up a support network. He may want to explain your husband's illness, as well as his status.
When my husband was diagnosed, they only involved me, not my husband's extended family, which is probably a good thing because his family thinks the doctor has it all wrong.
It's usually quite important if/when a doc opens a session to a spouse or to family. I would think the doc would fill you in first, as you are your husband's partner, live with him, and are most affected by his illness.

WC