Just simply Doctor. Depending on the hospital, the seniormost administrative post might or might not be held by a physician or a Ph.D. If it is, they are addressed as doctor, if not, then as mister.
most doctors work at a hospital
A senior consultant
Probably a doctor or a nurse
Yes, most people do. Though they will have to return to the hospital or their doctor to receive treatment.
yes there is but not called exactly that. if someone contacts you usin that hospital its most likely the 419 scam
Most nursing homes have 24 hour doctor services. Since senior patients experience lots of medical problems there is usually an on-site or on-call doctor. Most employees also have some medical certifications.
Most old or retired soldiers are called Veterans. Veterans that have reached the senior age are sometimes referred to as Senior Veterans.
I am assuming by "responsible" you mean "liable." Under my assuption, in most states the answer is probably both, so long as the doctor was acting within the scope of his employment when he committed the malpractice. The doctor would be directly liable, and the hospital through a theory of respondeat superior.
Parathyroidectomy is an operation done most commonly by a general surgeon, or occasionally by an otolaryngologist, in the operating room of a hospital.
Without a doubt, more obstetricians are on call more often and work longer once they are called. Hospital physicians also work long hours. The new trend in family practice is to assign a "hospital" doctor so that care is split between outpatient and inpatient.
I beleive that the most senior monk in any monastery is called the Abbot, regardless of their religion.
Make sure she gets to all her doctors appointments. Make sure you listen to what her doctor says she needs, as in medications and such.