Hematology is the study of the blood and blood disorders in the body. A hematologist is a physician who has expertise in diseases of the blood and bone marrow, and treats vascular and clotting problems. The hematologist also treats blood disorders such as hemophilia, leukemia, lymphoma, anemia and sickle cell disease.

Physicians in this specialty treat patients suffering from numerous diseases and illnesses, but some of the most common are Malaria, lymphoma, Non-Hodgkin's Lymphoma, Myelomas, Evans' syndrome, AIDS, Leukemia, hemophilia, Thrombocytopenia, Sickle-cell disease, Myeloma, Pernicious anemia, Hodgkin's disease, Thalassemia, Myelofibrosis, Infectious mononucleosis, Agranulocytosis, Systemic lupus erythematosus (SLE), Megaloblastic anemia, and Autoimmune hemolytic anemia.

Once properly diagnosed, practitioners can perform numerous procedures on patients including Chemotherapy, Bone marrow transplant, blood transfusion, radiotherapy, Intramuscular injections, Anticoagulation therapy, and Venesection.

To diagnose patients with possible illnesses and diseases, specialists will often perform one of many tests including Coombs test, D-dimer, Prothrombin time, Bone marrow biopsy, Protein electrophoresis, serum Ferritin level, Partial thromboplastin time, Vitamin B12 and Folate levels, Erythrocyte sedimentation rate (ESR), Blood film, Full blood count, and Hemoglobin electrophoresis.

Doctor density varies by specialty and location. Connecticut has 208 practicing hematologists. Broken out by city, hematology doctor density in Avon is 7, in Bloomfield is 1, in Bridgeport is 9, in Bristol is 10, in Cheshire is 1, in Danbury is 6, in Darien is 1, in Durham is 1, in East Hartford is 10, in Enfield is 6, in Essex is 7, in Fairfield is 11, in Farmington is 9, in Glastonbury is 1, in Greenwich is 3, in Guilford is 10, in Hamden is 9, in Hartford is 34, in Manchester is 4, in Meriden is 7, in Middlebury is 3, in Middletown is 6, in Milford is 3, in Mystic is 1, in New Britain is 8, in New Haven is 45, in New London is 8, in New Milford is 3, in Newington is 2, in Norwalk is 5, in Norwich is 7, in Old Saybrook is 1, in Philadelphia is 1, in Putnam is 4, in Sharon is 6, in Shelton is 5, in Southington is 7, in Stamford is 14, in Stratford is 5, in Torrington is 5, in Trumbull is 7, in Vernon is 6, in Vernon Rockville is 1, in Wallingford is 1, in Waterbury is 8, in Waterford is 3, in West Haven is 5, in Wethersfield is 6, in Willimantic is 5, and in Woodbridge is 19.

This New England state is one of the original 13 states; Connecticut’s capital is Hartford and its population is 3,510,297. This state is steeped in history. Visit the past at the Nathan Hale Homestead near New London, or Yale University in New Haven. Tour the home of Mark Twain, the New England Air Museum, or the Maritime Aquarium in Norwalk. Explore a historic tobacco farming area, do some hiking and biking, or visit the numerous antique shops or lighthouses in the eastern coastal area.

According to 2005 Census estimates, Connecticut has a population of 3,510,297. Of this population, 812,182 are under the age of 18 and 472,089 are at or above the age of 65.