ABIM Hematology

Hematology Certification Examination

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About this exam

The ABIM Hematology Certification Examination is the subspecialty board exam through which internists already certified in internal medicine earn added certification in hematology. It is intended for physicians who have completed an accredited hematology fellowship and can document clinical competence across the six ACGME/ABMS competencies, procedural skills, and professional behavior. Candidates must hold a valid, unrestricted and unchallenged license to practice medicine and must have finished required training, including vacation time, by October 31 of the examination year. The exam samples the full breadth of benign and malignant hematology: marrow failure and cytopenias, coagulopathy and thrombosis, hemoglobinopathies, myeloid and lymphoid neoplasms, transfusion and apheresis, and laboratory interpretation including peripheral smear and bone marrow findings. Preparation is best built around your fellowship's core clinical months, then extended with a structured content outline review, image-based smear and marrow practice, and board-style question sets timed to exam conditions. Dual certification candidates in hematology and medical oncology complete three years of accredited combined training, including at least 18 months of full-time clinical training. Verify all eligibility details against ABIM's current Policies and Procedures for Certification, since that publication governs eligibility decisions.

What you'll study

Common questions

About ABIM Hematology preparation

What are the core eligibility requirements for the hematology exam?

You must be previously certified in internal medicine by ABIM at application, satisfactorily complete accredited fellowship training, demonstrate clinical competence and ethical behavior, hold a valid, unrestricted and unchallenged medical license, and pass the Hematology Certification Examination. Fellowship must be accredited by the ACGME, the Royal College of Physicians and Surgeons of Canada, or the Collège des médecins du Québec.

How much fellowship training is required?

For fellows who began hematology fellowship in or after Academic Year 2018-19, the minimum is 24 months of training, of which 12 months must be clinical. Clinical months may be aggregated across the fellowship rather than completed consecutively, and continuity clinic time during nonclinical training does not count toward the clinical requirement.

What happens if I am a few days short on training time?

For deficits of 35 days or less in required training time, ABIM defers to the judgment of the program director and promotions or competency committee. With program director attestation that you achieved required competence, additional training time is not required. Trainees cannot make this request to ABIM on their own behalf.

When must my training be finished to sit for the exam?

Required training in the subspecialty, including vacation time, must be completed by October 31 of the year of examination. Plan backward from that date when scheduling electives and any extended final-year training, because an incomplete record at that point blocks admission.

How does dual certification with medical oncology work?

Dual certification requires three years of accredited combined training with at least 18 months of full-time clinical training: at least 12 months focused on neoplastic disease including hematologic malignancies and six months on non-neoplastic hematologic disorders. If two programs are involved, 24 continuous months must be completed at one institution, and both must be accredited in both disciplines.

Can I take one subspecialty exam before finishing all three combined years?

Yes. You may complete all three years before applying to either exam, or take one subspecialty exam after two years of combined training and then apply for the other exam after satisfactorily completing the third year. Continuity outpatient clinic must be maintained throughout all three years.

What does the exam actually test?

It assesses the medical knowledge and clinical judgment expected of a practicing hematologist across benign and malignant hematology, hemostasis and thrombosis, transfusion medicine, and laboratory interpretation. Expect image-based items on peripheral smears and bone marrow preparations, plus questions on systemic therapy, apheresis, and indwelling venous access devices.

How should I sequence my study time?

Start with a content outline and tag weak areas, then build short daily blocks on high-yield topics like cytopenias, coagulopathy, and myeloid and lymphoid neoplasms. Add spaced image review of smears and marrows, and finish with timed mixed question sets rather than re-reading notes. Track error patterns by topic instead of total score.

What are the most common reasons candidates struggle?

The usual failure modes are uneven coverage, such as over-studying oncology and neglecting coagulation, transfusion, and laboratory interpretation, and never practicing under time pressure. Others misjudge eligibility timing or assume clinical months can be double-counted. Verify training credit rules early and confirm details in ABIM's current Policies and Procedures for Certification.