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. Colorado has 179 practicing hematologists. Broken out by city, hematology doctor density in Akron is 1, in Arvada is 4, in Aurora is 35, in Basalt is 1, in Boulder is 9, in Burlington is 1, in Canon City is 2, in Colorado Springs is 21, in Denver is 78, in Durango is 5, in Edwards is 1, in Englewood is 7, in Estes Park is 1, in Fort Collins is 10, in Glenwood Springs is 4, in Grand Junction is 5, in Greeley is 7, in Greenwood Village is 1, in La Junta is 2, in Lafayette is 3, in Lakewood is 6, in Littleton is 11, in Lone Tree is 9, in Longmont is 5, in Louisville is 2, in Loveland is 7, in Montrose is 1, in Parker is 2, in Pueblo is 7, in Salida is 1, in Thornton is 6, in Wheat Ridge is 5, and in Yuma is 1.

Colorado is the Centennial state; having won statehood in 1876. Its capital is Denver, called the “Mile High City,” because its altitude at the state capitol steps is 5,280 feet. Colorado’s population is 4,653,023, and over half the state’s population is in the Denver metro area. Known for its Rocky Mountains and abundant outdoor sports opportunities, such as skiing, hiking, fishing and hunting, Colorado also offers tourists Pike’s Peak, the Royal Gorge, and the Red Rocks outdoor amphitheater. Denver is home to an active theater culture, a world-class symphony, and many sports activities. You can visit a gold mine, tour the state capitol building, climb a mountain, or relax in some therapeutic natural hot springs.

According to 2005 Census estimates, Colorado has a population of 4,665,177. Of this population, 1,140,002 are under the age of 18 and 462,190 are at or above the age of 65.