Top 25 Hematologists Across the US
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What is a Hematologist?
Learn about this specialty, training requirements, and when to schedule a visit.
A hematologist is a physician who specializes in the diagnosis, treatment, and prevention of blood disorders and diseases of the blood-forming organs. These medical experts manage conditions affecting red blood cells, white blood cells, platelets, bone marrow, lymph nodes, and the coagulation system. Hematologists are trained in the complex mechanisms of blood cell production, immune function, and the intricate balance of clotting and bleeding that maintains health.
Training and Qualifications
Becoming a hematologist requires extensive education and training:
- 4 years of medical school to earn an MD or DO degree
- 3 years of internal medicine residency training
- 2-3 years of hematology fellowship (often combined with oncology as hematology-oncology)
- Total of 13-14+ years of education and training beyond high school
- Optional additional subspecialty training in areas like bone marrow transplantation, hemostasis/thrombosis, or benign hematology
Board Certification: American Board of Internal Medicine (ABIM) with subspecialty certification in Hematology. Certification requires passing rigorous examinations after completing an accredited fellowship. Many hematologists hold dual certification in Hematology and Medical Oncology.
When Should You See a Hematologist?
You should consider seeing a hematologist if:
- You have unexplained anemia or abnormal blood counts
- You experience excessive bleeding or bruising without clear cause
- You have been diagnosed with or suspected of having a blood cancer (leukemia, lymphoma, myeloma)
- You have a family history of bleeding disorders or blood clots
- You have recurrent blood clots or have been diagnosed with a clotting disorder
- You have sickle cell disease or another inherited blood disorder
- You need evaluation before or after a bone marrow transplant
- You have unexplained fatigue with abnormal blood test results
Key Facts
Common Conditions Treated
Hematologists are trained to diagnose and treat a wide range of conditions. Here are some of the most common conditions that hematologists help patients manage.
Anemia
A condition where the blood lacks enough healthy red blood cells or hemoglobin to carry adequate oxygen to body tissues, causing fatigue and weakness.
Key Symptoms
Treatment Approach
Hematologists identify the specific type and cause of anemia through specialized blood tests, bone marrow examination if needed, and develop targeted treatment plans including iron therapy, vitamin supplementation, erythropoiesis-stimulating agents, or addressing underlying causes.
Leukemia
A group of blood cancers that develop in the bone marrow, causing abnormal white blood cell production that crowds out normal blood cells.
Key Symptoms
Treatment Approach
Hematologists diagnose leukemia through blood tests, bone marrow biopsy, and genetic analysis. They develop comprehensive treatment plans including chemotherapy, targeted therapy, immunotherapy, and coordinate bone marrow transplantation when indicated.
Lymphoma
Cancer of the lymphatic system affecting lymphocytes, including Hodgkin lymphoma and non-Hodgkin lymphoma, causing abnormal lymph node growth.
Key Symptoms
Treatment Approach
Hematologists work with pathologists to determine lymphoma type and stage through imaging, biopsies, and molecular testing. Treatment may include chemotherapy, immunotherapy, radiation therapy, or stem cell transplantation.
Bleeding Disorders (Hemophilia and von Willebrand Disease)
Inherited or acquired conditions where the blood does not clot properly, leading to prolonged bleeding after injuries, surgery, or spontaneously.
Key Symptoms
Treatment Approach
Hematologists diagnose bleeding disorders through specialized coagulation tests and develop individualized treatment plans including clotting factor replacement therapy, desmopressin, and preventive strategies before surgical procedures.
Blood Clotting Disorders (Thrombophilia)
Conditions that increase the tendency to form abnormal blood clots in veins or arteries, which can lead to deep vein thrombosis, pulmonary embolism, or stroke.
Key Symptoms
Treatment Approach
Hematologists perform thrombophilia testing to identify inherited or acquired clotting disorders, prescribe and monitor anticoagulation therapy, and develop long-term prevention strategies to reduce clot recurrence risk.
Sickle Cell Disease
An inherited blood disorder where red blood cells become crescent-shaped and rigid, causing blockages in blood vessels, pain crises, and organ damage.
Key Symptoms
Treatment Approach
Hematologists provide comprehensive sickle cell management including hydroxyurea therapy, pain management, blood transfusions, infection prevention, and evaluation for curative treatments like bone marrow transplantation or gene therapy.
Multiple Myeloma
A blood cancer that develops in plasma cells in the bone marrow, producing abnormal proteins that can damage bones, kidneys, and the immune system.
Key Symptoms
Treatment Approach
Hematologists diagnose myeloma through blood and urine protein tests, bone marrow biopsy, and imaging studies. Treatment includes chemotherapy, immunomodulatory drugs, proteasome inhibitors, monoclonal antibodies, and stem cell transplantation.
Bone Marrow Disorders (Myelodysplastic Syndromes and Aplastic Anemia)
Conditions where the bone marrow fails to produce adequate healthy blood cells, leading to low blood counts and increased risk of leukemia.
Key Symptoms
Treatment Approach
Hematologists diagnose bone marrow disorders through detailed blood tests, bone marrow biopsy with genetic analysis, and determine disease severity. Treatment may include growth factors, immunosuppressive therapy, chemotherapy, or bone marrow transplantation.
Important Note
This list represents common conditions but is not exhaustive. Hematologists treat many other conditions related to their specialty. If you're experiencing symptoms or have concerns, consult with a qualified hematologist for a proper evaluation.
What to Expect During Your Visit
Understanding what happens during your appointment can help you feel more prepared. Here's what you can typically expect when visiting a hematologist.
Your First Visit
- Comprehensive review of your medical history, family history of blood disorders, and current symptoms
- Discussion of any previous blood test abnormalities and treatments
- Physical examination including checking for enlarged lymph nodes, spleen, or liver
- Review of any prior blood work, imaging, or pathology reports
- Detailed discussion of your symptoms, their duration, and impact on daily life
- Development of a diagnostic plan including necessary blood tests and procedures
- Initial hematology consultation typically lasts 45-60 minutes
Diagnosis & Testing
- Complete blood count (CBC) with differential and peripheral blood smear review
- Iron studies, vitamin B12, folate levels for anemia evaluation
- Coagulation studies (PT, PTT, fibrinogen) for bleeding or clotting concerns
- Flow cytometry for blood cancer diagnosis and classification
- Bone marrow aspiration and biopsy for suspected marrow disorders
- Genetic and molecular testing for inherited disorders and cancer characterization
- Imaging studies (CT, PET scan) for lymphoma staging and monitoring
Treatment Options
- Iron, vitamin B12, or folate supplementation for deficiency anemias
- Blood transfusions for severe anemia or platelet disorders
- Chemotherapy, targeted therapy, or immunotherapy for blood cancers
- Anticoagulation therapy for clotting disorders
- Clotting factor replacement for bleeding disorders
- Bone marrow or stem cell transplantation for eligible patients
- Ongoing monitoring with regular blood tests and follow-up appointments
Tip for Your Visit
Bring a list of current medications, previous test results, and questions you want to ask. Writing down your symptoms—when they occur and what affects them—helps your hematologist provide accurate diagnosis and effective treatment.
How to Choose the Right Hematologist
Finding the right healthcare provider is important for your health and peace of mind. Here are key factors to consider when selecting a hematologist.
Credentials to Verify
- Board certification by the American Board of Internal Medicine (ABIM) in Hematology
- Completion of an ACGME-accredited hematology or hematology-oncology fellowship
- Active, unrestricted medical license in your state
- Hospital privileges at accredited medical centers
- Additional training if specialized care is needed (bone marrow transplant, hemophilia treatment center)
- Membership in American Society of Hematology (ASH)
Important Considerations
- Experience with your specific blood disorder or condition
- Access to comprehensive diagnostic services including bone marrow biopsy and flow cytometry
- Affiliation with a comprehensive cancer center if cancer treatment is needed
- Availability of clinical trials for newer treatment options
- Coordination with other specialists as needed for complex conditions
- Experience with bone marrow transplantation if that may be part of your treatment
- Communication style and willingness to explain complex conditions
Quick Tip
Don't hesitate to schedule consultations with multiple hematologists before making your decision. The right fit isn't just about credentials—it's also about feeling comfortable and confident in your care.
Cost and Insurance Information
Understanding the costs associated with seeing a hematologist can help you plan for your healthcare needs.
Average Costs (Without Insurance)
Initial Visit
$200-$400 (initial hematology consultation)
Follow-up Visit
$100-$250
Common Procedures
Note: These are estimated average costs and can vary based on location, provider, and specific services required.
Insurance Coverage
- Most health insurance covers hematology consultations and medically necessary tests
- Blood cancer treatment is typically covered but may require prior authorization
- Specialty medications and biologics often require step therapy or prior authorization
- In-network hematologists have negotiated rates reducing out-of-pocket costs
- Bone marrow transplantation requires extensive pre-authorization
- Clotting factor therapy for hemophilia is usually covered under pharmacy or medical benefits
Medicare Information
Medicare Part B covers hematology consultations, diagnostic tests, and procedures at 80% of the approved amount after the deductible. Part B also covers chemotherapy and blood transfusions. Part D covers oral cancer medications. Medicare covers bone marrow transplants when medically necessary at approved transplant centers.
Money-Saving Tips
- 1Always verify your hematologist is in-network before scheduling
- 2Ask about self-pay discounts if you don't have insurance
- 3Inquire about payment plans for expensive procedures
- 4Get prior authorization when required to avoid claim denials
- 5Use FSA or HSA funds for eligible medical expenses
Questions to Ask Your Hematologist
Being prepared for your appointment helps you get the most out of your time with your doctor. Here are important questions to consider asking a hematologist.
What is the specific diagnosis, and what does it mean for my health?
What caused my blood disorder, and is it hereditary?
What are my treatment options, and what do you recommend?
What are the potential side effects of the recommended treatment?
How often will I need blood tests and follow-up appointments?
Should my family members be tested for this condition?
Are there clinical trials available for my condition?
What symptoms should prompt me to seek immediate medical attention?
How will this condition affect my daily life and activities?
What is the long-term outlook for my condition?
Pro Tip
Write down your questions before your appointment and bring them with you. Don't hesitate to take notes during your visit or ask for written instructions.
When to Seek Emergency Care
Know when symptoms require immediate attention versus a scheduled appointment.
While most conditions can wait for a scheduled appointment with a hematologist, certain symptoms require immediate emergency care. Go to the emergency room or call 911 if you experience:
- Severe, uncontrolled bleeding that does not stop with pressure - may indicate serious bleeding disorder or low platelets
- Sudden severe headache, confusion, or weakness on one side - may indicate stroke from blood clot or bleeding
- Chest pain with shortness of breath - may indicate pulmonary embolism from blood clot
- High fever with very low white blood cell count - neutropenic fever is a medical emergency requiring immediate antibiotics
- Severe pain crisis in sickle cell disease not responding to home management
- Signs of severe anemia: extreme fatigue, rapid heartbeat, fainting, chest pain
EMERGENCY
Call 911 or nearest ER
URGENT
Doctor or urgent care
NON-URGENT
Regular appointment
Hematologist vs. Other Specialists
Understanding the differences between medical specialists helps you choose the right provider for your needs.
Hematologist vs. Oncologist
A hematologist specializes in all blood disorders, including both cancerous and non-cancerous conditions. An oncologist focuses specifically on cancer treatment. Many physicians are trained in both specialties (hematology-oncology) and treat blood cancers. However, for non-cancerous blood disorders like anemia or bleeding disorders, a hematologist focused on benign conditions may be more appropriate than a general oncologist.
Hematologist vs. Internal Medicine Physician
An internal medicine physician (internist) provides comprehensive adult primary care and manages common conditions including mild anemia. A hematologist is a subspecialist with additional years of training specifically in blood disorders. Patients with complex, severe, or rare blood conditions are typically referred from their internist to a hematologist for specialized diagnosis and treatment.
Hematologist vs. Pathologist
A pathologist is a physician who examines blood samples, bone marrow biopsies, and tissue specimens under the microscope to make diagnoses. Hematopathologists specialize in blood disorders. A hematologist is a clinician who sees patients, interprets the pathologist's findings, and provides treatment. The two specialties work closely together but have different roles in patient care.
Not sure which specialist you need?
Your primary care physician can help determine the right specialist for your condition and provide a referral if needed.
Sources & References
Information about hematologists is sourced from peer-reviewed medical literature and authoritative organizations.
Last updated: March 2026
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Frequently Asked Questions
Common questions about hematologists
What is the difference between a hematologist and an oncologist?
A hematologist specializes in blood disorders, while an oncologist specializes in cancer treatment. Many physicians complete combined hematology-oncology training and treat both blood cancers and solid tumors. However, some hematologists focus exclusively on non-cancerous blood disorders like anemia, bleeding disorders, and clotting problems. If you have a blood cancer like leukemia or lymphoma, you would typically see a hematologist-oncologist. For benign blood conditions, you might see a hematologist who specializes in non-malignant disorders.
What should I expect during a bone marrow biopsy?
A bone marrow biopsy is typically performed in the office or outpatient setting. The procedure takes about 15-30 minutes. Your doctor will numb the area over your hip bone with local anesthesia. You may feel pressure and brief discomfort when the sample is taken, but significant pain should be minimal. Most patients can return to normal activities within 24 hours. Mild soreness at the site for a few days is common. Results typically take 3-7 days, with some specialized tests taking longer.
How are bleeding disorders inherited, and should my family be tested?
Many bleeding disorders like hemophilia and von Willebrand disease are inherited. Hemophilia A and B are X-linked, primarily affecting males while females are typically carriers. Von Willebrand disease is usually autosomal dominant, affecting both sexes equally. If you have a bleeding disorder, your hematologist will likely recommend genetic counseling and testing for family members, especially before surgeries or pregnancies. Knowing your family's bleeding disorder status helps prevent complications.
How often will I need blood tests and follow-up appointments?
The frequency of monitoring depends on your condition. Patients with stable, chronic conditions like mild anemia may need blood tests every 3-6 months. Those receiving chemotherapy typically need weekly or bi-weekly monitoring. Patients on blood thinners require regular INR checks (weekly to monthly). After completing cancer treatment, follow-up may be every 3 months initially, then less frequent over time. Your hematologist will create a monitoring schedule tailored to your specific needs.
What are the treatment options for blood cancers, and what is the prognosis?
Treatment for blood cancers has advanced dramatically and varies by cancer type, stage, and individual factors. Options include chemotherapy, targeted therapies that attack specific cancer mutations, immunotherapy including CAR-T cell therapy, radiation, and bone marrow transplantation. Many blood cancers are now highly treatable or curable. For example, Hodgkin lymphoma has cure rates exceeding 80%, and many types of leukemia can achieve long-term remission. Your hematologist will discuss your specific prognosis and treatment options based on your diagnosis.
Medical disclaimer: This content is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. If you have a medical emergency, call 911. Our editorial standards