Blood and bone marrow play important roles in maintaining overall health, from carrying oxygen and supporting immunity to helping the body control bleeding. When blood test results remain abnormal or symptoms are difficult to explain, consulting a specialist can help identify the underlying cause. A Hematologist specializes in diagnosing and managing conditions involving blood cells, bone marrow, blood clotting, and related disorders. Patients may be referred for evaluation of anemia, unusual blood counts, bleeding or clotting problems, or other persistent concerns.