@stoneMason-- I'm not one hundred percent sure but I think they are the same. Both are medical secretaries that work in hospital settings or other health care facilities. The duties are mostly the same as well. It involves administrative work, admitting patients, helping patients with insurance and billing. Ward secretaries are also the first people that patients will meet with when they go to a medical facility. So they are also the contact point between the patients, nurses and doctors.
I think many hospitals do require a medical secretary certification from a community college or similar institution that offers classes and certification programs in this area. But there may also be places that do not require certification and that will give on the job training.