Daniel Griffen, MD, FACC

  • Adventist Medical Group
4.8 / 5
Based on 504Reviews Click for More Information

Specialty

  • Cardiovascular Disease

Appointments

301-670-3000

Locations

  • Primary Location

    Adventist HealthCare Cardiac Associates

    15225 Shady Grove Road Suite 201

    Rockville, MD 20850

    Phone: 301-670-3000

Office Hours

Sunday Closed
Monday 8:00 AM - 5:00 PM
Tuesday 8:00 AM - 5:00 PM
Wednesday 8:00 AM - 5:00 PM
Thursday 8:00 AM - 5:00 PM
Friday 8:00 AM - 5:00 PM
Saturday Closed

About Daniel Leonard Griffen III

D. Leonard Griffen, MD, FACC is the Chairman of Cardiology at Laurel Regional Hospital.

Dr. Griffen obtained his undergraduate degree at Iowa State University and his medical degree from University of Iowa College of Medicine. He completed his residency and fellowship at the National Naval Medical Center. Dr. Griffen also completed additional training in echocardiography Laboratory at Duke University. He is a fellow of the American College of Cardiology and Board Certified in Cardiovascular Diseases as well as Advanced Echocardiography.

Dr. Griffen specializes in transthoracic, transesophageal and stress echocardiography. His professional interests include diagnostic cardiology, congestive heart failure and adult congenital disease.

Profile

Education

MD; University of Iowa (1982)

Board Certifications

  • American Board of Internal Medicine

Hospital Affiliations

  • Adventist HealthCare Rehabilitation
  • Adventist HealthCare White Oak Medical Center

Patient Reviews

4.8/5
Based on 505 Reviews

The following ratings and reviews are based on verified feedback collected from independently administered patient experience surveys. The ratings and comments submitted by patients reflect their own views and opinions. Patient identities are withheld to ensure confidentiality and privacy.

4.9
Provider showed concern
4.8
Provider explained things clearly
4.8
Provider included you in decisions
4.8
Provider discussed treatment options
4.7
Time CP spent with patient
4.8
Likelihood of recommending this provider

Comments

5.0
December 29, 2025
Good
4.17
December 28, 2025
He is good doctor but as I am a deaf person, there were no ASL interpreter or VRI that day. In the past we had no problem with that
4.83
December 24, 2025
Doctor is great! Could always use more time discussing health issues, though. Dr. Explained in detail steps he would take to get the insurance company to pay for meds even tho' they don't want to pay. He's really good at explaining things.you need to give him more time with patients, not more patients! Highly recommend him!
5.0
December 23, 2025
Good
5.0
December 15, 2025
Dr Griffen is great
5.0
December 14, 2025
Dr. Griffen is the best. I have recommended him and will continue to.
4.67
December 02, 2025
Good
5.0
November 25, 2025
Very good.
5.0
November 19, 2025
Good experience
5.0
November 11, 2025
Everything was excellent
5.0
November 04, 2025
None
5.0
October 21, 2025
Dr. Griffen, took the time to go over results and explain what was going on and how to treat the issue. He was very professional.
5.0
October 21, 2025
Very good; responsive, helpful suggestions.
4.8
October 14, 2025
Dr. Griffin was very thorough, as is typical.
5.0
October 10, 2025
Dr. Griffen always takes proper time to talk with his patients and ask questions regarding patient well being, health matters, and concerns. My current visit was no exception. I believe patient discussions are as important as the actual testing and physical exams and Dr. Griffen excels at both.
5.0
September 30, 2025
Griffen is great!
5.0
September 30, 2025
Great doctor.
5.0
September 28, 2025
I have recommended them to at least three people. I have been very impressed with the quality of care I have received.
5.0
September 22, 2025
Great.
5.0
September 21, 2025
Good
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