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Mark E. Lieb, MD

Mark E. Lieb, MD

Optum Provider

Specialty

Cardiovascular Disease

Languages

English

Seeing patients at

Monday 8:30 AM - 5:00 PM
Tuesday 8:30 AM - 5:00 PM
Wednesday 8:30 AM - 5:00 PM
Thursday 8:30 AM - 5:00 PM
Friday 8:30 AM - 5:00 PM
Saturday Closed
Sunday Closed
Hours may vary, please contact to schedule and confirm appointment availability.

Patient Reviews

Patient review summary

Learn about our survey

5

4

3

2

1

5.0

94 reviews

    • Reviewed on May 30, 2026
    • Verified Review

    Excellent doctor, compassionate and caring. He takes his time during the appointment and doesn't rush through it. He is one of the main reasons I have stayed with the group

    • Reviewed on May 30, 2026
    • Verified Review

    Strong doctor patient relationship. His knowledge and ability to communicate.

    • Reviewed on May 27, 2026
    • Verified Review

    Confident in his level of care

    • Reviewed on May 24, 2026
    • Verified Review

    Because as much as I think Optum is horrific, he is a great physician who does not rush the appointment and explains everything very clearly and well

    • Reviewed on May 23, 2026
    • Verified Review

    Been my cardiologist for decades Always caring a great listener. Terrific with follow up Explains all processes and drugs and treatments

    • Reviewed on May 18, 2026
    • Verified Review

    Because he is a very knowledgeable, thorough and experienced Dr., who spends the time needed to get the job done

    • Reviewed on May 18, 2026
    • Verified Review

    He is an excellent cardiologist

    • Reviewed on May 18, 2026
    • Verified Review

    I love Dr. Lieb. He takes time with his patients and reviews history, current status, and treatment plan moving forward. He acts more like a PCP than my current Optum PCP. I recommend him very highly. I've been seeing him regularly for almost 10 years (since Dr. Wallach retired).

    • Reviewed on May 11, 2026
    • Verified Review

    Dr. Lieb studies your problem and advises you on your care arefully.

    • Reviewed on May 7, 2026
    • Verified Review

    He is very caring and thoughtful.

    • Reviewed on May 3, 2026
    • Verified Review

    He is the very best Doctor!

    • Reviewed on Apr 30, 2026
    • Verified Review

    He explains things very well, and I always feel like he gives me his full attention and care.

    • Reviewed on Apr 26, 2026
    • Verified Review

    Competent and interested in what the patient has to say. Does not pander.

    • Reviewed on Apr 18, 2026
    • Verified Review

    I think he is very easy to work with, very calm, very personable, informative and helpful

    • Reviewed on Apr 11, 2026
    • Verified Review

    Doctor Lieb is very thorough in his exam and any explaining of my condition. He is caring and has compassion for his patient while maintaining professionalism. By far he is the best doctor that I have chosen to use at Optum. There should be more like him on staff.

    • Reviewed on Apr 9, 2026
    • Verified Review

    Because he listens and gives, what I believe, is straight forward and honest advice. Offers options and doesn't push meds or procedures you don't want. Overall, he has great patient skills.

    • Reviewed on Apr 7, 2026
    • Verified Review

    Very easy going and good listening

    • Reviewed on Apr 3, 2026
    • Verified Review

    He's the best! Kind, caring and an amazing doctor!

    • Reviewed on Mar 29, 2026
    • Verified Review

    Dr Lieb is very capable of explaining my health assessments and advising how to stay healthy via exercide, diet, medicine, and periodic checkups.

    • Reviewed on Mar 29, 2026
    • Verified Review

    Dr. is a great doctor. He listens carefully and gives feedback.

Page 1 of 5
  • About Mark E. Lieb, MD

    Award-winning cardiologist Mark E. Lieb, MD, provides exceptional care for patients with hypertension, elevated cholesterol, and cardiac rhythm disorders. His patient-centered approach emphasizes education and cardiovascular disease prevention. He earned his medical degree from Boston University and completed advanced cardiology training at Mount Sinai. Dr. Lieb has been recognized by Best Doctors in America, Castle Connolly, and regional publications.

    Philosophy of care

    He emphasizes prevention, education, and personalized cardiovascular care.

    Gender

    Male

    Board certifications

    American Board of Internal Medicine

    Licenses

    NY, 180753

    Employed or contracted

    Employed

    Network Name

    CareMount

    NPI

    1619921749

  • Insurance Accepted

    This list is for informational purposes only and may not reflect the most current plans accepted by the provider. Optum accepts most major health insurance plans. Please contact your insurance company to confirm your coverage, eligibility, and the provider's participation in your plan.

    • 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

    • Boston University School of Medicine

    Residency

    • Mount Sinai Hospital