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Jeffrey L. Halaas, MD, PHD

Jeffrey L. Halaas, MD, PHD

Optum Provider

Specialty

Hematology & Oncology

Languages

English

Seeing patients at

Monday 9:00 AM - 5:00 PM
Tuesday 9:00 AM - 5:00 PM
Wednesday 9:00 AM - 5:00 PM
Thursday 9:00 AM - 5:00 PM
Friday 9:00 AM - 5:00 PM
Saturday Closed
Sunday Closed
Please contact the clinic directly to schedule and confirm appointment availability.
Monday 9:00 AM - 5:00 PM
Tuesday 9:00 AM - 5:00 PM
Wednesday 9:00 AM - 5:00 PM
Thursday 9:00 AM - 5:00 PM
Friday 9:00 AM - 5:00 PM
Saturday Closed
Sunday Closed
Please contact the clinic directly to schedule and confirm appointment availability.

Patient Reviews

Patient review summary

Learn about our survey

5

4

3

2

1

4.9

33 reviews

  • Mar 23, 2026
    Verified Review

    I like Dr halaas he always answers my questions and he is concerned about his patients. I would highly recommend Dr DrHalaas.

  • Mar 22, 2026
    Verified Review

    Excellent doctor!

  • Mar 21, 2026
    Verified Review

    He's the best !!

  • Mar 21, 2026
    Verified Review

    Dr. Halaas is an exceptional doctor. He is very caring and knowledgeable and is extremely calm. He is an asset to your organization. He is extremely competent and is always willing to listen to you.

  • Mar 20, 2026
    Verified Review

    He seems very knowledgeable and he’s very personable. He takes the time to answer my questions fully. He makes me very comfortable during the visit and does not rush the visit.

  • Mar 14, 2026
    Verified Review

    Professional and personable.

  • Mar 11, 2026
    Verified Review

    Excellent and caring doctor

  • Mar 7, 2026
    Verified Review

    excellent doctor, explains things well, is very knowledgeable in his field, compassionate, does not overreact to medical issues of a serious nature, provides next steps especially when they include expertise needed outside of Optum, invaluable. I trust him

  • Feb 26, 2026
    Verified Review

    caring, knowledgeable, clear communication, efficient, professional

  • Feb 21, 2026
    Verified Review

    Dr Halaas has been my long time physician for close to 20 years. He has always been compassionate and understanding. He is truly a wonderful example of what a doctor should be.

  • Feb 19, 2026
    Verified Review

    He is amazing

  • Feb 12, 2026
    Verified Review

    He’s always listened to me & addressed my concerns honestly.

  • Feb 6, 2026
    Verified Review

    He’s a good doctor.

  • Feb 5, 2026
    Verified Review

    Knowledgeable, sensitive to your concerns, prompt.

  • Feb 5, 2026
    Verified Review

    Superb physician, very knowledgeable, and knows how to talk to patients.

  • Feb 1, 2026
    Verified Review

    He is very caring and knows how to help me.

  • Jan 29, 2026
    Verified Review

    Fully explained possible problems. Answered all questions. Very pleasant to deal with.

  • Jan 29, 2026
    Verified Review

    Very easy going and informative. Good listener

  • Jan 29, 2026
    Verified Review

    He is very tentative to your needs and questions. Very easy to understand, and extremely compassionate.

  • Jan 21, 2026
    Verified Review

    Other Doctors and nurses I have talked with along my journey all mention how brilliant he is. I am of the same opinion

Page 1 of 2
  • About Jeffrey L. Halaas, MD, PHD

    Dr. Jeffrey L. Halaas is a physician specializing in oncology and benign hematology. His clinical focus includes lymphoma leukemia and solid tumor cancers.

    Philosophy of care

    Dr. Halaas provides clear communication and compassionate support throughout treatment.

    Gender

    Male

    Board certifications

    American Board certified in Medical Oncology and Hematology

    Licenses

    NY, 219677

    Employed or contracted

    Employed

    Network Name

    CareMount

    NPI

    1851346928

  • Insurance accepted

    This may not reflect all insurance accepted by the provider and is for informational purposes only.

    • 1199
    • Aetna
    • Affinity
    • Anthem BCBS
    • CDPHP
    • CHN
    • Centivo
    • Cigna
    • Coventry
    • EmblemHealth
    • First Health
    • Healthfirst
    • Humana
    • MVP Healthcare
    • MagnaCare
    • Medicaid
    • Medicare
    • MetroPlus
    • MultiPlan
    • NYSHIP
    • Northwell Direct
    • Oscar
    • Oxford
    • TRICARE
    • UMR
  • Medical School

    • Weill Cornell Medical College

    Residency

    • NewYork-Presbyterian Hospital/Weill Cornell Medical Center

    Fellowship

    • Memorial Sloan Kettering Cancer Center Hematology & Medical Oncology

      Hematology & Oncology

      New York

  • Awards and Publications

    Westchester Magazine, Best Doctors

    US News and World Report, Best Doctors