In the United States, a specialist is a doctor who focuses on a narrow area of care. Dermatology, oncology, pediatrics, endocrinology, etc., etc. You typically wouldn’t go see an oncologist unless there was some concern regarding cancer. For historical reasons, dental and medical are seperate categories. You might go see a dental specialist but he or she typically isn’t considered a medical specialist. Twenty-two specialist is a lot for a healthy person.