Published Jan 8, 2026 3 Min Read

Understanding Who a Hematologist Is

 
 

A haematologist is a doctor who specialises in diagnosing, treating, and managing problems with the blood, bone marrow, and lymphatic system. They handle conditions such as anaemia, clotting disorders, and blood cancers like leukaemia. This guide explains what haematologists do—from running tests and procedures to working with other medical specialists—along with the different areas of haematology and the training needed to become one. It also helps readers understand when to see a haematologist and how these experts help protect and improve health.


What is a haematologist?


A haematologist is a doctor who diagnoses, treats, and manages problems with the blood, bone marrow, and lymphatic system. They handle both non-cancerous conditions, such as anaemia or clotting disorders, and blood cancers like leukaemia. Haematologists study blood and the organs that produce it, often working with haematopathologists, who focus on diagnosing these diseases. Some haematologists also treat blood cancers, combining their role with that of an oncologist as a haematologist-oncologist.


Role of a haematologist


  • Diagnose and Treat:
    Identify and manage blood problems, from deficiencies to cancers.
  • Treat Blood Cancers:
    Manage leukaemia, lymphoma, and myeloma using chemotherapy, immunotherapy, and bone marrow transplants.
  • Handle Non-Cancer Conditions:
  • Anaemias: Iron deficiency, thalassaemia
  • Bleeding and Clotting Disorders: Haemophilia, von Willebrand disease, DVT
  • Other Issues: Sickle cell disease, platelet problems, transfusion complications
  • Consult and Collaborate:
    Work closely with GPs, pathologists, and oncologists.
  • Perform Procedures:
    Request tests such as bone marrow biopsies and provide treatments like transfusions or chemotherapy.

Types of haematologists and their specialties


There are various types of haematologists who may focus on different patient groups or diseases. For example, paediatric haematologists specialise in blood disorders in children, while haematologist-oncologists focus on blood cancers and related treatments. Some haematologists specialise in blood transfusion medicine or coagulation disorders, tailoring their expertise to specific medical needs.


Common haematology tests and procedures


Common Haematology Tests
These tests check the number, shape, and function of blood cells:

  • Complete Blood Count (CBC/FBC): Measures red and white blood cells, haemoglobin, haematocrit, and platelets.
  • Coagulation Tests: Includes PT/INR, aPTT, and D-Dimer to assess blood clotting.
  • Peripheral Blood Smear: Examines the shape and appearance of blood cells.
  • ESR (Erythrocyte Sedimentation Rate): Detects inflammation in the body.
  • Reticulocyte Count: Shows how actively the bone marrow is producing new red blood cells.
  • Haemoglobin Electrophoresis: Identifies abnormal types of haemoglobin.

Common Haematology Procedures

  • Taking blood samples (venipuncture)
  • Bone marrow aspiration or biopsy
  • Phlebotomy (removing blood for treatment)
  • Blood transfusions
  • Flow cytometry (cell analysis)
  • Iron infusions

Education required to become a haematologist


Undergraduate Degree:
Complete a bachelor’s degree with science and maths subjects, usually on a pre-medical track.

Medical School (MBBS/MD):
Finish a 4–5 year medical programme followed by a 1-year internship.

Residency Training:
Undertake a 3-year residency in one of the following:

  • Internal Medicine: Focus on adult haematology
  • Paediatrics: Focus on childhood blood disorders
  • Pathology: Focus on laboratory-based haematopathology

Fellowship Training (Subspecialty):
Complete a 3–5 year fellowship to specialise in:

  • Clinical Haematology: Direct patient care for blood disorders
  • Haematology/Oncology: Blood disorders and blood cancers
  • Haematopathology: Laboratory diagnosis of blood diseases

Difference between a haematologist and a haematopathologist


FeatureHaematologistHaematopathologist
Primary WorkplaceClinics and hospital wardsLaboratories
Patient InteractionFrequent and directRare or minimal
Main GoalTreat and monitor patients’ blood disordersDiagnose the underlying cause of blood diseases
Training PathInternal Medicine or PaediatricsAnatomical or Clinical Pathology

When to See a haematologist


You should consult a haematologist if your doctor notices unusual results in your blood tests, such as low platelets or high white blood cells. You should also see a specialist if you have symptoms like excessive bleeding or bruising, constant tiredness, frequent infections, unexplained fever, night sweats, or swollen lymph nodes. These can signal problems with your blood, bone marrow, or lymphatic system that need expert care.


Conclusion

Haematologists are essential healthcare providers for diagnosing and managing complex blood disorders. If you are a healthcare professional aspiring to specialise in haematology or looking to enhance your qualifications, financial assistance options like loans for doctors or a professional loan can help support your educational and career goals.

Frequently Asked Questions

Can a haematologist help with iron deficiency anemia?

Yes, haematologists are equipped to diagnose and treat iron deficiency anaemia. They perform tests such as complete blood counts (CBC) and serum ferritin levels to assess iron levels in the body. Treatment plans may include dietary changes, iron supplements, or addressing underlying causes like chronic blood loss. Consulting a haematologist ensures a comprehensive approach to managing the condition effectively.

What kind of tests does a haematologist perform for blood clotting issues?

To evaluate blood clotting disorders, a haematologist may recommend:

  • Coagulation profiles: These tests measure how quickly blood clots form.
  • Platelet function tests: To assess the role of platelets in clot formation.
  • Genetic testing: To identify inherited clotting disorders like Factor V Leiden mutation.

These tests help determine the cause of clotting abnormalities and guide targeted treatment.

Do I need a referral from my primary doctor to see a haematologist?

In most cases, a referral from a primary care doctor is required to see a haematologist. However, some healthcare systems allow direct appointments. Primary doctors often identify symptoms of blood disorders and recommend a haematologist for specialised care. Consulting a haematologist ensures accurate diagnosis and advanced treatment options.

Can haematologists perform bone marrow transplants?

While haematologists are involved in the diagnosis and preparation for bone marrow transplants, the procedure itself is usually performed by a specialised team, often including oncologists and transplant surgeons. Haematologists play a vital role in managing the patient’s condition before and after the transplant, ensuring a smooth recovery.

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