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 504 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.

4.8
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
April 29, 2026
Dr Griffen is very caring & takes time to explain things & answers any questions I have. He keeps current on all my health issues with my primary care doctor. He is an excellent doctor!
5.0
April 23, 2026
Caring
5.0
April 21, 2026
Dr. Griffen is an excellent physician.
4.67
April 21, 2026
Care provider explained issues clearly, recommended changes in medicine to address current comdition.
5.0
April 17, 2026
Go?d
5.0
April 15, 2026
I can't thank you enough for the excellent and professional care you provided, and for answering all my questions. Doctor Daniel Griffen and all the medical staff treated me with love and care. I would highly recommend this practice. Thank you!
5.0
April 10, 2026
Dr. Griffen was very understanding and explained everything to me.
4.0
March 21, 2026
Dr was good explaining about my test results and he listened to issues about my medical problems. He was amazied that my blood work was so much better .
5.0
March 19, 2026
Totally gave me insight , good advice made me feel comfortable. Very very pleased
5.0
March 12, 2026
Excellent
5.0
March 09, 2026
Dr Griffin is an excellent doctor!
5.0
March 05, 2026
Very good experience.
5.0
March 03, 2026
Great doctor, very professional and jovial
3.5
February 16, 2026
The explanations were very quick and technical, which made them tough to follow at times.
5.0
February 07, 2026
Excellent
5.0
February 04, 2026
The physician was attentive and communicated very well
5.0
February 03, 2026
I have known this doctor for >20 years - very friendly atmosphere, but also complete conversation about care.
5.0
January 29, 2026
Dr. Griffin Addressed my symptoms, listened to and addressed my questions said he'd see me in six months
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
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