Daniel Griffen, MD, FACC

  • Adventist Medical Group
4.8 / 5
Based on 498Reviews 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 500 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
4.8
Time CP spent with patient
4.8
Likelihood of recommending this provider

Comments

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
5.0
September 17, 2025
Very Good
4.0
September 14, 2025
Dr is always nice and when he has concerns he will see me sooner
4.0
September 14, 2025
Spent less than 10 minutes. Appointment felt rushed
5.0
September 08, 2025
I love Dr Griffen
5.0
September 08, 2025
Excellent
5.0
September 02, 2025
Dr Griffen is the best
5.0
September 01, 2025
Dr Griffin has been my cardiologist for over 23 years & he has always provided caring, excellent care. He is proactive & and insures that I completely understand everything with respect to medication, tests & follow up.
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