SQL statement filter result

Question

I need to filter the SQL query result according to 3 conditions:
1. Location
2. Doctor Name
3. Specialty Name

Below is the sql query if all 3 conditions are

Answer 1

select Location, ...
from clinicdoctors
where 
 ISNULL(@Location,Location) = Location
 and ISNULL(@DoctorName,DoctorName) = DoctorName
 and ISNULL(@SpecialtyName,SpecialtyName) = SpecialtyName