The list of those responsible is long. Basically, any medical professional or medical facility can be sued for medical malpractice. This includes: Doctors, Nurses, Chiropractors, Surgeons, Therapists, Pharmacists, Pharmacies, and/or Nursing Homes. You can also sue more than one person or entity, as responsibility could be shared. For example, if you had surgery at a hospital and the doctor was negligent by leaving a foreign object inside your body, you can sue both parties. You may also be able to sue the hospital under the legal doctrine of respondent superior if the hospital employees were negligent. If so, the hospital may be vicariously liable for their medical negligence or error. That said, even without this doctrine, a hospital or another entity can be sued if it was otherwise negligent (e.g., failing to hire proper staff).