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Department Subspecialty Care for Women's Health
Primary Location Cleveland Clinic Main Campus
Type of Doctor Adults Only
Languages English
Surgeon Yes
Locations Specialties & Treatments

Treatment & Services

  • Uterine Fibroids Treatment
View all 1 Treatment & Services +

Specialty in Diseases & Conditions

  • Abdominal Adhesions
  • Abdominal Mass
  • Abdominal Pain
  • Abnormal Menstrual Bleeding
  • Abnormal Pap Smears
  • Abnormal Uterine Bleeding
  • Absent Period
  • Adenexal Mass
  • Dysmenorrhea
  • Dyspareunia
  • Ectopic Pregnancy
  • Endometriosis
  • Fibroid Tumor
  • Fibroids And Leiomyoma
  • Interstitial Cystitis | Pelvic Pain
  • Menorrhagia
  • Menstrual Disorders
  • Myomas
  • Pelvic Pain
View all 19 Specialties +


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Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - University of Louisville
Minimimally Invasive Gynecological Surgery
Louisville, KY USA

Residency - Phoenix Integrated Residency in ObGyn
Phoenix, AZ USA

Medical Education - University of Kentucky
Lexington, KY USA

Research & Publications

Research & Publications

See publications for Mark Dassel, MD.

(Disclaimer: This search is powered by PubMed, a service of the U.S. National Library of Medicine. PubMed is a third-party website with no affiliation with Cleveland Clinic.)

Industry Relationships

Industry Relationships

Cleveland Clinic physicians and scientists may collaborate with the pharmaceutical or medical device industries to help develop medical breakthroughs or provide medical expertise or education. Cleveland Clinic strives to make scientific advances that will benefit patient care and support outside relationships that promise public benefit. In order for the discoveries of Cleveland Clinic physicians' and scientists' laboratories and investigations to benefit the public, these discoveries must be commercialized in partnership with industry. As experts in their fields, Cleveland Clinic physicians and scientists are often sought after by industry to consult, provide expertise and education.

To assure professional and commercial integrity in such matters, Cleveland Clinic maintains a program that reviews these collaborations and, when appropriate, puts measures in place to minimize bias that may result from ties to industry. Cleveland Clinic publicly discloses the names of companies when (i) its physicians/scientists receive $5,000 or more per year (or, in rare cases, equity or stock options) for speaking and consulting, (ii) its physicians/scientists serve as a fiduciary, (iii) its physicians/scientists receive or have the right to receive royalties or (iv) its physicians/ scientists hold any equity interest for the physician's/scientist's role as inventor, discoverer, developer, founder or consultant.* In publicly disclosing this information, Cleveland Clinic tries to provide information as accurately as possible about its physicians' and scientists' connections with industry.

As of 3/10/2021, Dr. Dassel has reported no financial relationship with industry that is applicable to this listing. In general, patients should feel free to contact their doctor about any of the relationships and how the relationships are overseen by Cleveland Clinic. To learn more about Cleveland Clinic's policies on collaborations with industry and innovation management, go to our Integrity in Innovation page.

Public Health Service-Reportable Financial Conflicts of Interest. Cleveland Clinic scientists and physicians engage in basic, translational and clinical research activities, working to solve health problems, enhance patient care and improve quality of life for patients. Interactions with industry are essential to bringing the researchers' discoveries to the public, but can present the potential for conflicts of interest related to their research activities. Click here to view a listing of instances where Cleveland Clinic has identified a Public Health Service (PHS)-Reportable Financial Conflict of Interest and has put measures in place to ensure that, to the extent possible, the design, conduct and reporting of the research is free from bias.

* Cleveland Clinic physicians and scientists subscribe to the guidance presented in the PhRMA Code on Interactions with Healthcare Professionals and the AdvaMed Code of Ethics on Interactions with Health Care Professionals. As such, gifts of substantial value are generally prohibited.

Patient Satisfaction Reviews

62 Patient Satisfaction Reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

Responses are measured on a scale of 1 to 5 with 5 being the best score.

The comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Cleveland Clinic.

Overall Star Ratings
4.9 out of 5
Explains 4.9
Listens 5
Courtesy, Respect & Concern 4.9
Patient Rating of Doctor 4.9

22 Patient Comments

Reviewed on Apr 30, 2021

Dr. Dassel treated me after 7 months of being misdiagnosed by another physician. I have had a very positive experience under his care-he is always patient, empathetic, explains things well, and addresses any questions.

Reviewed on Apr 29, 2021

Dr Dassel is extremely knowledgeable about my condition and I am confident in him helping me get a little more back to normal. He listened to all my concerns and was very compassionate.

Reviewed on Apr 22, 2021

Dr. Dassel was amazing!! He is very caring and took time to listen to my concerns and explain what my options were. He is a caring physician...which makes him a rare find.

Reviewed on Apr 2, 2021

Amazing Doctor! Not only is he exceptional in his field, he is also caring, respectful and takes time to really listen.

Reviewed on Feb 10, 2021

I've already told several friends and family members about Dr. Dassel. He has my complete confidence and recommendation.

Reviewed on Jan 29, 2021

Dr. Dassel is the first doctor I've had helping me with my endometriosis that is exceptionally educated and helpful and willing to keep the ball rolling with options. I'm extremely appreciative and thankful for Dr. Dassel.

Reviewed on Dec 18, 2020

Dr. Dassel is one of the most caring physicians I've encountered. He makes you apart of your care plan and listens to your concerns/questions.

Reviewed on Dec 18, 2020

Dr Dassel and I go way back! I have seen him for my Endo for a long time even before he was at Cleveland Clinic! He is Amazing!!!! I can't ask for a better Dr to take care of my Endo! His knowledge of Endo is unexplainable! He is so smart! He always includes me in the decisions he makes about my Endo. He is so Empathetic, caring, and compassionate. He spends good quality time with you so you feel you are getting that great care. He doesn't rush his patients. If you have Endo, look no further for a different Doctor! Dr Dassel will fight for you!!! But, he usually runs late! so if you are okay with that then! He is your guy!

Reviewed on Dec 18, 2020

Dr Dassel was very kind and courteous. Treatment of my chronic pelvic pain has been complicated. Dr Dassel encouraged me to try various procedures in hope that something would work. It's been 4 yrs since the pelvic pain started. Finally, I'm finding consistent improvement in treating my condition. Dr Dassel supported my idea for trying different treatment options and medications. It was very encouraging to have him listen, offer advise, and assure me that he is available should I need additional assistance in the future. I felt comfortable discussing my health issues. He's a very caring and kind person.

Reviewed on Dec 16, 2020

Dr Dassel is an amazing doctor who really cares about his patients. He always makes me feel heard and cared for.

Reviewed on Dec 8, 2020

Dr. Dassel's expertise and customer service is top-notch. I have seen several specialists over the past year. out of all of them, he has been the one to provide me with an accurate diagnosis and assist me on my road to recovery. I have already recommended him to several individuals.

Reviewed on Nov 20, 2020

I liked that Dr. Dassel has early appointment times.

Reviewed on Nov 20, 2020

I saw Dr. Dassel for chronic pelvic pain with a prior history of endometriosis and pelvic floor disorder. Dr. Dassel took a very thorough history and took his time with me. I wish all doctors still did this. He also did a good job explaining his plans for ruling out any other secondary causes of my chronic pelvic pain and his possible treatment plans for the most likely diagnosis. I liked that he actually looked at a multimodal approach including medications, therapy, and procedures. While I am still very hesitant as to whether or not Dr. Dassel will be able to help me get back to a more normal lifestyle (prior experience of physicians not willing or being able to help me), I felt like he had a well thought out plan for diagnosis and treatment at the end of the visit.

Reviewed on Aug 26, 2020

Dr. Dassel is the best of the best. He takes the time to listen. I never leave an appointment feeling like I was not able to have all my questions answered. Dr. Dassel truly cares about his patients quality of life and provides excellent care. Pelvic Pain is often difficult to discuss but I feel completely comfortable speaking to any concerns I have. Cleveland Clinic is lucky to have him as a provider and I would strongly encourage anyone struggling with pelvic pain to seek care from his office.

Reviewed on Aug 20, 2020

My visit with Dr. Dassel was great; however, it took his office 6 weeks to get a surgery scheduler to call me with a surgery date.

Reviewed on Aug 14, 2020

Highly recommend. Super attentive and cares about his patients. Will advocate for you if needed and listens to your needs and addreses your concerns. Makes patients feel very comfortable. All around an excellent physician.

Reviewed on Aug 7, 2020

Dr. Dassel has always taken the time to really listen. Never feel rushed. Thinks about what steps need to taken and always takes your opinion in those steps.

Reviewed on Jul 29, 2020

sally, the secretary to Dr Dassel is amazing! She's wonderful at scheduling appointments. Sally made my first appointment with Dr Dassel, and has scheduled every subsequent appointment.

Reviewed on Jul 29, 2020

Dr Dassel takes the time to go over everything with you, listens to your concerns and answers your questions.

Reviewed on Jul 17, 2020

Dr. Dassell is truly one of a kind!

Reviewed on Jun 22, 2020

Dr. Dassel spent over an hour with me during the appointment, showing me scans, explaining things so thoroughly, He was incredibly reassuring and very compassionate.

Reviewed on Jun 16, 2020

Dr. Dassel is great. he goes above and beyond with his care.

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