Specialist Type
When You Need a Blood Disorder Specialist (Hematologist)
Your primary care doctor mentioned a blood disorder and you want to understand the next step.
Educational, not diagnostic. This page won't tell you whether you have cancer. It will help you have a more productive conversation with your physician. For emergencies, call 911.
A hematologist is a specialist trained in disorders of the blood and bone marrow. They treat both benign conditions — like anemia, clotting disorders, and low platelets — and blood cancers, such as leukemia, lymphoma, and myeloma.
Most patients are referred after abnormal blood work shows up on a routine panel: a low red cell count, an unusually high white count, abnormal platelets, or unexplained iron levels.
A first hematology visit is rarely about treatment. It's about explanation — sorting out what the numbers actually mean and whether further testing (a peripheral smear, bone marrow biopsy, or genetic study) is needed.
Common causes — most are not cancer
Anemia
Low red blood cells from iron deficiency, B12 deficiency, chronic disease, or marrow problems.
Clotting & bleeding disorders
DVT, pulmonary embolism, frequent miscarriages, or easy bruising/bleeding.
Low or high platelets
ITP, essential thrombocythemia, or reactive changes to inflammation.
Elevated white blood cells
Usually infection or inflammation, occasionally chronic leukemias.
Suspected blood cancer
Leukemia, lymphoma, myeloma, or myelodysplastic syndromes.
Abnormal iron studies
Hemochromatosis (too much iron) or unexplained deficiency despite supplementation.
- Abnormal CBC on more than one occasion
- Easy bruising, prolonged bleeding from minor cuts, or frequent nosebleeds
- A clot in the leg or lung without obvious cause
- Family history of clotting disorders or blood cancer
- Persistent fatigue with low hemoglobin that doesn't respond to iron
- Bone pain, night sweats, or weight loss alongside abnormal blood counts
What a proper work-up looks like
- 1
Records review
The hematologist reviews trends in your blood counts over time — one snapshot is rarely enough.
- 2
Peripheral smear
A trained eye looking at your blood cells under a microscope is one of the most valuable tests in hematology.
- 3
Targeted blood work
Iron panel, reticulocyte count, LDH, B12/folate, coagulation studies, or flow cytometry depending on the question.
- 4
Bone marrow biopsy
Done in the office under local anesthesia when needed to evaluate the marrow directly. Not always required.
Questions worth bringing to your appointment
- What does my blood count pattern actually suggest?
- Is this likely benign or are we ruling out something more serious?
- Do I need a bone marrow biopsy, and what does it involve?
- If treatment is needed, will it be here or do I need a transplant center?
Frequently asked questions
What's the difference between a hematologist and an oncologist?
Most US specialists are trained in both — 'hematology/oncology.' Hematology focuses on blood and marrow disorders (both benign and malignant); oncology focuses on solid tumor cancers. The same physician often handles both.
Does seeing a hematologist mean I have cancer?
No. The majority of hematology patients have non-cancerous conditions like iron deficiency, clotting disorders, or low platelets. Hematologists are essentially detectives for abnormal blood work.
Do I need a referral?
Most HMO plans require a referral from your primary care physician. PPO plans usually don't, but a referral with your records and prior labs makes the first visit far more productive.
Insurance accepted
Coverage details vary by plan. Our care coordinators help verify your benefits before scheduling.
Want a calm, expert opinion on what's going on?
Request a new patient consultation or independent second opinion with Keck Medicine of USC — Newport Beach. Most major insurance accepted.