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Dr. Mark Tanenbaum, MD

Dr. Mark Tanenbaum, MD

Cardiology*
35+ years of experience

Dr. Mark Tanenbaum, MD is a cardiologist in Fairfax, VA and has over 35 years of experience in the medical field. Dr. Tanenbaum has extensive experience in Adult Congenital Heart Conditions. He graduated from GeorgeTown University in 1986. He is affiliated with Reston Hospital Center. He is accepting new patients and telehealth appointments.

4.5 Star Rating
Based on 35 reviews 4.5 Star Rating (35 reviews)

Hospital Highlight

Dr. Tanenbaum is affiliated with Reston Hospital Center Reston, a highly rated hospital.

Dr. Tanenbaum is a Healthgrades Choice provider in Cardiology

The Healthgrades Choice designation helps you understand the most important factors to consider when choosing a healthcare professional. This designation is earned based on four set standards.
Read our methodology

  • Above average experience
  • Good hospital quality
  • Good patient ratings
  • No healthcare sanctions
  • Areas of ExpertiseDr. Tanenbaum specializes in the areas of Cardiovascular Disease & Internal Medicine. See board certifications
  • Explains Conditions WellPatients said this doctor explains conditions well. See reviews
  • Offers TelehealthThis doctor offers telehealth appointments. Call the office to schedule an appointment.
  • Practices at Top HospitalAmerica’s 50 Best Hospitals for Surgical Excellence Award™ See hospitals

More Cardiology Specialists at Reston Hospital Center

Experience Check

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Dr. Tanenbaum's Reviews

Likelihood to recommend Dr. Tanenbaum

4.5
35 ratings, 22 with a written review
5 star
86%
86%
4 star
0%
0%
3 star
0%
0%
2 star
3%
3%
1 star
11%
11%

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Top notch doctor & service.
Experience and knowledge. Treating patients with care and empathy.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Salim – Feb 25, 2025
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My Cardologist
I have been seeing Dr. Tannenbaum for 21 years. He has always been very generous with his time and taken care to discuss everything during my visits. I was always very concerned about my health and acted like I was his most important patient.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Jul 17, 2024
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Excellent, Caring, Direct, Patient, and Efficient
Dr. Tannenbaum is an excellent listener and able to draw together a clear plan of intervention and action from a myriad of symptoms and inputs. He does so in a caring supportive manner while being direct and to the point.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
JMDC – Jun 26, 2024
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The best!
Dr. Tannenbaum always makes me feel heard and cared for.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
May 29, 2024
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Best Cardiologist
Dr Tanenbaum comes to my appointment aware of my medical history and purpose of this appointment. He takes his time reviewing my numbers and suggests a course of action. But what I appreciate the most about Dr Tanenbaum is that he writes everything done and gives me a copy so there’s no chance for confusion or forgetfulness or misinterpretation.
What went well
  • I felt respected
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Valerie Frank – Mar 21, 2024
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Knowledgeable and Caring
Telehealth
Have been seeing Dr. Tannenbaum for years. I highly recommend him. He’s knowledgeable and caring and has gone above and beyond to address my many questions.
What went well
  • I felt respected
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
  • Difficult to schedule appointment
1 other person found this helpful
Helpful
EWA – Feb 06, 2024
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Personable, knowledgeable physician
Dr. Tanenbaum was sensitive and caring - and gave very helpful advice.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Jan 17, 2024
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Very positive experience
Dr. Tanenbaum took time to discuss health matters and listened to my concerns. The staff was friendly and caring. All in all, a positive visit to the doctor! Looking forward to my next visit.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Del F – Jul 01, 2023
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He listened
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
May 05, 2023
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Great Physician
Dr. T is very efficient, friendly, and knowledgeable as he answered all of our questions and concerns to our satisfaction.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
  • Long wait times
Helpful
Dr. Robert Osterberg – Apr 07, 2023
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*****
Dr Tanenbaum has been looking out for my cardiac health for over ten years. Always on time, always pleasant, never scares me with doom and gloom warnings, and I feel like he's treating me, the patient, instead of the data that describe me, which I appreciate. He takes my concerns seriously. The practice is easy to work with as well, from reception to billing. Do be prepared for a long wait time to see a doctor. I usually schedule visits six months in advance. When I had an urgent need arise I was able to get in with an NP or PA within a week, but it would have been months to see Dr. Tanenbaum. The NP/PA staff that I've seen were completely competent and gave me great care, too.
What went well
  • Office environment
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
C. Wilson – Apr 07, 2023
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Great doctor!
My visit with Dr Tanenbaum was very professional and thorough. He listened carefully and asked appropriate questions.
What went well
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Andres Domeyko – Apr 07, 2023
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Have been seeing Dr. Tanenbaum, since first visiting VA Heart, years ago. Great listener.
What went well
No results
What could be improved
No results
Helpful
Jan 30, 2023
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Dr. Tanenbaum is the best cardiologist on the planet! Dedicated, brilliant, knowledgeable, a true professional in every respect.
What went well
No results
What could be improved
No results
Helpful
John J. Gannon – Jan 27, 2023
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Dr. Tanenbaum
Appointment was on time, Dr. T was very thorough and I was able to ask the questions I had. Dr. T is not standoffish and allows for time and never seems rushed!
What went well
  • Listened & answered questions
  • Appointment wasn't rushed
  • Wait times
What could be improved
  • Staff wasn't friendly
Helpful
VA Heart Experience – Jul 05, 2022
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The Good Doctor
Each visit is the same: very professional and knowledgeable mixed with a high level of cheerfulness. Dr. Tanenbaum has been my cardiologist for the passed 20 years and I would never consider someone else caring for me.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Richard Salva – Jun 24, 2022
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Follow up
Everything from front desk staff to the doctor, highly professional, courteous and thorough
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Chris K – Jun 23, 2022
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An Excellent Cardiologist
Dr. Tanenbaum is an excellent Cardiologist with excellent credentials and experience. A doctor who listens and provides good advice.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
George Escobedo – Jun 13, 2022
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I had a horrible experience with Dr. Tanenbaum. I have a cardiac birth defect which has been monitored every few years all my life. At age 45 I got my regular echo and went to see Dr. Tanenbaum for a standard consult. He told me that I had an enlarged right ventricle and would likely need valve surgery. This result was unexpected and upsetting. However, the echo report, which I later received, did not indicate an enlarged right ventricle. I had a follow-up stress-echo and cardiac MRI. Both confirmed regular right ventricle function. Additionally, Virginia Heart has not canceled another follow-up visit despite two requests to cancel the appointment.
What went well
  • Staff friendliness
What could be improved
  • Difficult to schedule appointment
  • Didn't listen or answer questions
  • Didn't trust the provider's decisions
2 others found this helpful
Helpful
Apr 15, 2021
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I received your excellent care. Thank you !
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Y.S.Seo – Jan 09, 2020
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About Me

biography

This physician is accepting telehealth visits.
  • Cardiology

  • Interventional Cardiology

  • Internal Medicine

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • Georgetown University Hospital

    Fellowship Hospital
  • Georgetown University Hospital

    Residency Hospital
  • Georgetown University Hospital

    Internship Hospital
  • Georgetown University

    Medical School, 1986
American Board of Medical Specialties®
American Board of Internal Medicine®
Cardiovascular Disease
Internal Medicine
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.

Dr. Tanenbaum is a Healthgrades Choice provider in Cardiology

    Read our methodology

    Affiliated Hospitals

    • Reston Hospital Center

      1850 Town Center Pkwy
      Reston, VA 20190
      Recipient of 33
      hospital awards

      America’s 50 Best Hospitals for Surgical Excellence Award™ (2025, 2024, 2023)

      Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

      Patient Safety Excellence Award™ (2025, 2024, 2023)

      Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

      View all awards

      How patients felt about the care they received at this hospital.

      81%
      Patients said they were given information about recovering at home

      3% lower than the national average

      73%
      Patients said that doctors always listened to them and explained things well

      3% lower than the national average

      View all patient feedback
    Learn more about how Healthgrades measures Hospital Quality