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.
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.
The reviews listed below were collected independently of First Coast Cardiovascular Institute through rater8. Each review represents an authentic and verified patient experience.
Very personable. Easy to communicate with. Had a goal for getting off my CPAP device.
(1 week ago)
Dec-2025
Always so nice and understanding and doesn’t judge me for anything, it refreshing. Thank you Dr. T!!
(1 week ago)
Dec-2025
He was very friendly and knowledgeable. He was very energetic, but seemed overworked. Look forward to his professional help.
(2 weeks ago)
Dec-2025
The best doctor
(2 weeks ago)
Dec-2025
Dr.T
He is an amazing doctor.
Great communication and knowledge
He really takes care of his patients
(2 weeks ago)
Dec-2025
Very nice doctor
(2 weeks ago)
Dec-2025
I love the Doc. He’s thorough very nice great personality knowledgeable and I travel an hour to see him.
(2 weeks ago)
Dec-2025
An extremely caring doctor.
(3 weeks ago)
Dec-2025
I had a wonderful experience with this doctor. He was very thoughtful, kind, and understanding throughout my visit. He really listened to my needs and addressed my concerns directly. I appreciated his matter-of-fact approach—he got right to the point without any unnecessary delay. He was also extremely supportive, which made me feel comfortable and confident in his care. I’m truly pleased to have him as my new sleep doctor.
(3 weeks ago)
Dec-2025
Very personable and explained exactly what would happen.
(3 weeks ago)
Dec-2025
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Mandarin Office
9759 San Jose Boulevard Ste 2 Jacksonville, FL 32257
Northside Office
3890 Dunn Avenue Ste 203 Jacksonville, FL 32218
Fleming Island Office
1681 Eagle Harbor Parkway East Ste B Fleming Island, FL 32003
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
Very personable. Easy to communicate with. Had a goal for getting off my CPAP device.
Always so nice and understanding and doesn’t judge me for anything, it refreshing. Thank you Dr. T!!
He was very friendly and knowledgeable. He was very energetic, but seemed overworked. Look forward to his professional help.
The best doctor
Dr.T He is an amazing doctor. Great communication and knowledge He really takes care of his patients
Very nice doctor
I love the Doc. He’s thorough very nice great personality knowledgeable and I travel an hour to see him.
An extremely caring doctor.
I had a wonderful experience with this doctor. He was very thoughtful, kind, and understanding throughout my visit. He really listened to my needs and addressed my concerns directly. I appreciated his matter-of-fact approach—he got right to the point without any unnecessary delay. He was also extremely supportive, which made me feel comfortable and confident in his care. I’m truly pleased to have him as my new sleep doctor.
Very personable and explained exactly what would happen.