Yazan Khatib, MD, FACC, FSCAI, FABVM, FSVM - President of First Coast Cardiovascular Institute
Vaqar Ali, M.D. - Vice President of First Coast Cardiovascular Institute
Youssef Al-Saghir, MD, FACC, FSCAI, FABVM
Mubbasher Syed, MD, MPH, FACC, FSCAI
Verified Reviews
You can trust
You can trust
Daniel Thielemann, M.D.
First Coast Cardiovascular Institute
Sleep Medicine, Cardiology
Jacksonville, Fleming
Most recent review: 4 days ago
New
4.9
623 Ratings
311 Comments
Dr. Daniel Thielemann, M.D., was honored to join First Coast Cardiovascular Institute in August 2011, as the medical director of the Sleep Disorders Laboratory and clinical sleep medicine services. Dr. Thielemann was always strongly driven to academic achievement, and during his high school years in Mississippi, he was recognized as a National Merit Scholar. He subsequently graduated magna cum laude from Mississippi College with an undergraduate degree in biology, with minors in history and English.
4.9
623 Ratings
311 Comments
Dr. Daniel Thielemann, M.D., was honored to join First Coast Cardiovascular Institute in August 2011, as the medical director of the Sleep Disorders Laboratory and clinical sleep medicine services. Dr. Thielemann was always strongly driven to academic achievement, and during his high school years in Mississippi, he was recognized as a National Merit Scholar. He subsequently graduated magna cum laude from Mississippi College with an undergraduate degree in biology, with minors in history and English.
Recent activity this week!
Most recent review: 4 days ago
• 311 total reviews
The reviews listed below were collected independently of First Coast Cardiovascular Institute through rater8. Each review represents an authentic and verified patient experience.
Read More
Mandarin Office
9759 San Jose Boulevard
Ste 2
Jacksonville, FL 32257
Ste 2
Jacksonville, FL 32257
Northside Office
3890 Dunn Avenue
Ste 203
Jacksonville, FL 32218
Ste 203
Jacksonville, FL 32218
Clay County Office
1465 Kingsley Ave.
Orange Park, FL 32073
Orange Park, FL 32073
Dr. Daniel Thielemann, M.D., was honored to join First Coast Cardiovascular Institute in August 2011, as the medical director of the Sleep Disorders Laboratory and clinical sleep medicine services.
Dr. Thielemann was always strongly driven to academic achievement, and during his high school years in Mississippi, he was recognized as a National Merit Scholar. He subsequently graduated magna cum laude from Mississippi College with an undergraduate degree in biology, with minors in history and English. He went on to earn his Doctor of Medicine degree in 2006 from the University of Mississippi Medical Center in Jackson.
In his later years of graduate training at UMMC, Dr. Thielemann took advanced electives in neurosurgery and neuroanatomy under distinguished faculty members Andrew Parent, M.D., and Duane Haines, Ph.D., with the future goal of entering the field of endovascular surgical neuroradiology and establishing a career treating patients suffering from vascular diseases of the nervous system.
Upon graduation from medical school, Dr. Thielemann traveled to Pittsburgh, PA., to complete a one-year internship in Internal Medicine and a three-year residency in Neurology at Allegheny General Hospital. There he studied under such leaders in the field of neurological medicine as Jon Brillman, M.D., and James Valeriano, M.D., as he pursued studies in stroke medicine and vascular neurology. It was during this time frame that he first discovered and became passionate about the rapidly growing subspecialty field of sleep disorders and elected to pursue this as a career. During his last year of residency, Dr. Thielemann had the honor of being chosen as chief resident.
After selecting his new focus, Dr. Thielemann continued his training at the University of Nebraska Medical Center in Omaha, where he completed a one-year fellowship in Sleep Medicine, working under nationally recognized sleep specialist physicians Teri Barkoukis, M.D., Michael Summers, M.D., and Sabin Bista M.B.B.S.
Dr. Thielemann is an avid reader, enjoys classical music, and continues to study rich and varied subjects including mythology, art, ancient history, military history, archeology, paleontology, theology, philosophy, and the history of the state of Florida. He also enjoys salt-water fishing. Dr. Thielemann, his wife, and their two sons enjoy their family time, which includes the exploration of the greater Jacksonville and St. Augustine areas.
Board Certifications:
American Board of Psychiatry and Neurology – Neurology
American Board of Psychiatry and Neurology – Sleep Medicine
See other doctors in First Coast Cardiovascular Institute
© 2026 All Rights Reserved. rater8.
He is very nice and very thorough when explaining the process!
Spends time with patient
Personable , knowledgeable & easy to talk with. Sincerely interested in solving patient issues. I look forward to a continued relationship. Highly recommend.
Brian Schul, sled driver, SR71 youtube.
He was very knowledgeable and helpful with all my questions. His staff was proactive in providing reminders and sending a text to be to let me know what my copayment would be. I thought that was very helpful.
Always excellent service and on time
As always friendly and explains any process concerning me.
Omg the Doctor is the best and he really listen, makes you feel comfortable and tries to find a solution 10/10
Very pleasant calm and patient We love dr. Thielemann
Takes the time to listen to you.