Help getting in 3NF

[Intense_SS]

I thought I already had this in 3NF but was told that I may have a Primary Key consisting of one or more fields. What does that mean?
I was told to check my functional dependecies. Again a bit lost. Any help you could provide so I can get this database going would be greatly appreciated. Below is where I am at:

Problem #1:

Patient (Patient Num, Patient Name, Household Num, Balance)
Household (Household Num, Household Name)
Contact Information (Patient Num, Street, City, Zip, State)
Service (Service Code, Description, Fee, Date)

Problem #2:

Customer (CustomerNum, Last Name, First Name)
Part (PartNum, Description, ONHAND, CLASS, WAREHOUSE, PRICE)
Invoice (OrderNum, OrderDate, Number Ordered, Quoted Price)
Rep ( RepNum, Customer Name)

 

[YNWA]

Are these your tables and their fields?

You have Patient with a Patient Num then a Contact Information with a Patient Num this may be it?

Also for your fields take the spaces out of them for best practice purposes.

We need more detail?

 

[Intense_SS]

Yes these are my tables and fields.

 

[YNWA]

And were do you get this error? We need more info?

What are you trying to do?

 

[rodmc]

Problem one

patient/household/contact info - not sure why youve got these in different tables, they would be one to one relations and would serve no purpose really.