You can deduct the cost of meals and lodging at a hospital or similar institution if you're there to receive medical care. Per Diem in the Houston area is $96 for lodging and $55 for Meals and Incidentals. FY 2021 Per Diem Rates for Texas
IRS PUB 502 states the following for lodging for medical reasons.
The amount you include in medical expenses for lodging can't be more than $50 for each night for each person.
You can include lodging for a person traveling with the
person receiving the medical care. For example, if a parent is traveling with a sick child, up to $100 per night can
be included as a medical expense for lodging. Meals
aren't included.
Don't include the cost of lodging while away from home
for medical treatment if that treatment isn't received from a
doctor in a licensed hospital or in a medical care facility
related to, or the equivalent of, a licensed hospital or if that
lodging isn't primarily for or essential to the medical care
received.