Department Cleveland Clinic Lou Ruvo Center for Brain Health
Primary Location Lou Ruvo Center for Brain Health - Las Vegas
Type of Doctor Adults Only
Languages English
Surgeon No
Locations Specialties & Treatments

Treatment & Services

  • Alzheimer's
  • Consultation, Evaluation, And Treatment Adult Neurological Disorders
View all 2 Treatment & Services +

Specialty in Diseases & Conditions

  • Alzheimer's
  • Alzheimer's and Dementia
  • Cognitive Disorders
  • Dementia with Lewy Bodies
  • Encephalopathy
  • Frontotemporal Dementia (FTD)
  • Memory Loss
View all 7 Specialties +


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About Aaron Ritter, MD

Aaron Ritter, MD, Associate Staff, Neuropsychiatry and Behavioral Neurology as well as the Director of Clinical Trials at the Cleveland Clinic Lou Ruvo Center for Brain Health.

Dr. Ritter treats adult Neurological patients and also leads the clinical Research Department by conducting urgently needed trials to advance the prevention, early detection, and treatment for Alzheimer’s disease, Parkinson’s disease, multiple sclerosis, and Huntington’s disease.  With more than 50 drugs and diagnostic trials being conducted at the Center, the Lou Ruvo Center for Brain Health is one of the largest and most active clinical research facilities for memory disorders in the country.

Dr. Ritter initially joined the Cleveland Clinic Lou Ruvo Center for Brain Health in July 2014 as a clinical fellow in Behavioral Neurology and Neuropsychiatry. Dr. Ritter comes to Las Vegas from Tucson following completion of his internship (in pediatrics) and three year residency (in psychiatry) at the University of Arizona.

At the University of Arizona, Dr. Ritter was involved in research projects looking at the neurocircuitry of emotional disorders, the effect of hypothyroidism on mood states, and psychiatric presentations of neurodegenerative disorders. He received two research awards from the University of Arizona for his work on these projects. In addition, Dr. Ritter developed a strong interest in medical education. Following completion of his internship, he received a distinguished teaching award that recognized him as one of the top three “resident educators” out of a pool of more than 600 residents and fellows.

During his two year clinical fellowship at the Lou Ruvo Center for Brain Health, Dr. Ritter received further training in diagnosing and treating neurodegenerative disorders such as Alzheimer’s disease, frontotemporal dementia, dementia with Lewy bodies, and chronic traumatic encephalopathy.

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - Cleveland Clinic Lou Ruvo Center for Brain Health
Behavioral Neurology and Neuropsychiatry
Las Vegas, NV USA

Fellowship - Behavioral Neurology Neuropsychiatry


Residency - University of Arizona Medical Center
Tucson, AZ USA

Residency - University of Arizona Medical Center
Tucson, AZ USA

Medical Education - University of Colorado School of Medicine
Denver, CO USA

Undergraduate - University of Wisconsin
Madison, WI USA

Additional Training

  • Fellowship in Behavioral Neurology and Neuropsychiatry

    Cleveland Clinic Lou Ruvo Center for Brain Health, Las Vegas NV


    Residency in Psychiatry

    University of Arizona, Tucson, AZ



    University of Arizona, Tucson, AZ


    Medical Degree

    University of Colorado School of Medicine, Denver, Colorado


    Bachelor of Arts

    University of Wisconsin, Madison, Wisconsin


Professional Highlights

  • Publications

    Ritter A, Banks, SA, Leger, G, Miller, J, Neuropsychological testing in pathologically verified Alzheimer’s disease and frontotemporal dementia: How well do the Uniform Data Set measures differentiate between diseases? Alzheimer’s Disease and Associated Disorders. (accepted)

    Ritter A, Cummings JL, Fluid Biomarkers in Clinical Trials of Alzheimer's Disease Therapeutics. Front Neurol. 2015 Aug 31;6:186.

    Ritter A, Pillai JA, Treatment of Vascular Cognitive Impairment. Curr Treat Options Neurol. 2015 Aug;17(8):367.

    Research/Clinical Trials

    Primary Investigator, Clinical and Translational Research Core (CTRC) for Center for Biomedical Research Excellence (COBRE). National Institute of Health. Cleveland Clinic, Las Vegas, NV.

    Sub-Investigator, A Phase 3 Multicenter, Randomized, Double-Blind, Placebo-Controlled, Parallel-Group Study to Evaluate the Efficacy and Safety of Aducanumab in Subjects with Early Alzheimer’s Disease. Cleveland Clinic, Las Vegas, NV.

    Sub-Investigator, A Phase 2, Multicenter, Randomized, Double-Blind, Placebo-Controlled, Cross-over Study to Assess the Safety, Tolerability and Efficacy of AVP-786 for the Treatment of Disinhibition in Patients with Neurodegenerative Disorders. Avanir Pharmaceuticals Inc. Cleveland Clinic, Las Vegas, NV.

    Sub-Investigator, Rasagiline Rescue in Alzheimer’s Disease Clinical Trial. Alzheimer’s Disease Cooperative Study. Cleveland Clinic, Las Vegas, NV.

    Sub-Investigator, Biomarker Qualification for Risk of MCI due to AD and Safety and Efficacy Evaluation of Pioglitazone (AD-4833 SR 0.8 mg QD) in Delaying its Onset. Takeda Pharmaceuticals. Cleveland Clinic, Las Vegas, NV.

    Sub-Investigator, Anti-Amyloid Treatment in Asymptomatic Alzheimer’s Disease, Lily. Cleveland Clinic, Las Vegas, NV.

    Sub-Investigator, A Randomized Controlled Trial of Cognitive Remediation and D-cycloserine for Individuals with Bipolar Disorder (DCS). University of Arizona, Tucson, AZ.


  • Psychiatry

Awards & Honors

  • Cleveland Clinic Excellence in Teaching Award for 2015-2016

    Cleveland Clinic Excellence in Teaching Award for 2014-2015

    Ely Lily Research Award for 2013-2014

    University of Arizona

    GME Resident Excellence and Leadership Scholarship for 2012-2013

    University of Arizona, Tucson, Arizona

    Junior Resident Award for Best Overall Performance for 2012-2013

    Department of Psychiatry, University of Arizona

    Dean’s List in Excellence in Teaching by a House officer 2010-2011

    University of Arizona College of Medicine


  • American Academy of Neurology
  • American Neuropsychiatric Association
  • International Neuropsychological Society
  • International Parkinson and Movement Disorder Society
Research & Publications

Research & Publications

See publications for Aaron Ritter, 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 9/8/2019, Dr. Ritter 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

365 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
Courtesy, Respect & Concern 5
Patient Rating of Doctor 5

83 Patient Comments

Reviewed on Dec 20, 2019

I appreciate Dr. Ritter for his honesty, effort and bedside manner. He explained my unique situation with clarity and made no unreal promises. He's fantastic!

Reviewed on Nov 27, 2019

Dr Ritter was informative, curtious and showed concern.

Reviewed on Nov 26, 2019

Dr Ritter was great, he asked great questions narrowed down what could contribute to my memory gaps and have great solutions and then said I could follow up if those things were not working! excellent Neurologist! I would highly recommend him!

Reviewed on Nov 21, 2019

I was quite impressed with Dr Ritter.

Reviewed on Nov 8, 2019

DR. Ritter is incredibly kind, caring, knowledgeable, and professional.

Reviewed on Nov 7, 2019

Dr. Ritter is very kind and considerate, My Sister and I never have a question he doesn't answer.

Reviewed on Oct 30, 2019

Dr. Ritter is an amazing professional. Highly competent, kind, and takes the time to fully explain what's going on with my mom. I couldn't ask for a better doctor.

Reviewed on Oct 22, 2019

Dr. Ritter is great! He is engaged and listens. He is respectful and caring.

Reviewed on Oct 16, 2019

Dr. Ritter and his staff are excellent, very caring, understanding and compassionate.

Reviewed on Oct 15, 2019

Dr. Ritter is a great listener and makes me feel like he's not rushed and takes ownership of my situation

Reviewed on Oct 14, 2019

Dr. Ritter was so awesome with my dad. I really appreciate how attentive he was, yet how he understood when I gave him information about my dad's health that my dad cannot express about himself due to his memory loss.

Reviewed on Oct 11, 2019

Dr Ritter is awesome and very patient

Reviewed on Oct 10, 2019

hopefully nobody will need an alzheimer's dr but if they do I will definitely give them a referral

Reviewed on Oct 3, 2019

Excellent visit. Dr. Ritter was very understanding, answered all of our questions and provided us with enough information to make good decisions.

Reviewed on Oct 1, 2019

Dr. Ritter is very good, understanding, professional, not rushed and listens!

Reviewed on Sep 19, 2019

I was very happy with how quick I was able to see Dr. Ritter.

Reviewed on Sep 13, 2019

Dr. Ritter is a very compassionate doctor and we enjoyed our visit very much. Dr. Ritter was helpful with information regarding activities at the center which we are very interested in, and he has a very pleasant manner about him. He was very thorough in his questions and care, and we left feeling very confident and without any questions or concerns.

Reviewed on Sep 11, 2019

I was/am very impressed with Dr. Ritter's concern for my challenges. I will not hesitate to recommend him to anyone in need of his/your services.

Reviewed on Sep 9, 2019

love Dr Ritter....he cares for the caregiver ad well as the patient

Reviewed on Sep 6, 2019

Dr. Ritter is always very kind and compassionate.

Reviewed on Sep 6, 2019

I liked that the Dr. gave the patient eye contact at all times as though he was an important person.

Reviewed on Sep 5, 2019

I was very happy with my meeting with Dr. Ritter. he was prepared and I feel that we had a good session. I look forward to another opportunity. we also appreciate your time.

Reviewed on Sep 4, 2019

Dr Ritter is very kind, and educated.

Reviewed on Aug 30, 2019

Dr Ritter provided the information I wanted, which was directly related to the results of tests done over time that showed my level of functioning currently and what's expected in the future.

Reviewed on Aug 28, 2019

Dr. Ritter was by far the best MD I have ever seen.

Reviewed on Aug 28, 2019

Wonderful Doctor. He explains everything very well, has time and patience and lots of soul (kindness) especially a Dr. that loves his work and his patients.

Reviewed on Aug 26, 2019

Dr Ritter is an excellent provider. A good listener. Explains your situation clearly. Professional and caring in the way he relates to you. In short, he's the best!

Reviewed on Aug 20, 2019

I liked Dr Rutter very much.

Reviewed on Aug 20, 2019

the care, concern, and expertise of Dr Ritter is exceptional

Reviewed on Aug 20, 2019

Dr Ritter is an exceptional doctor!

Reviewed on Aug 20, 2019

dr. Ritter is always very helpful in answering our questions and fears.

Reviewed on Aug 12, 2019

Dr Ritter is the kindest and most compassionate person ever. my mom looks forward to her visits with him!

Reviewed on Aug 1, 2019

Provider spent time talking with me and my family. Explained everything during the visit.

Reviewed on Jul 30, 2019

Again, on a scale of 1 to 10, Dr. Ritter was a 10+ .... Very professional, organized, and informative. I look forward to working with him with my medical / mental issues.

Reviewed on Jul 29, 2019

Dr. Ritter is the best! I felt important, unhurried, and respected. He is a big asset to the clinic.

Reviewed on Jul 22, 2019

the Dr. called me personally to give me results so I didn't need to be stressed for 6wks till nexy appt

Reviewed on Jul 11, 2019

I have excellent experience with Dr. Ritter and the Cleveland Clinic's personnel. All my less than perfect experiences were centered around the travel arrangements controlled outside of Cleveland Clinics.

Reviewed on Jul 10, 2019

I was very pleased with my visit. all my questions were answered and I learned so much. thank you Dr Ritter.

Reviewed on Jun 28, 2019

1st meeting with Dr. Ritter was excellent.

Reviewed on Jun 27, 2019

loved the doctor and the amount patience and time he spent with me

Reviewed on Jun 21, 2019

Dr. Ritter was WONDERFUL!

Reviewed on Jun 19, 2019

Dr. Ritter is extraordinary. He was extremely kind and caring towards me and my husband, who is the patient. I cannot express adequately how wonderful Dr. Ritter is. We are grateful.

Reviewed on Jun 19, 2019

Dr Ritter gave us surprising but welcoming news. We felt so good after the meeting.

Reviewed on Jun 19, 2019

We absolutely LOVE Dr. Ritter! He cares, he listens, he explains.

Reviewed on Jun 14, 2019

I have been to a lot of dr appoints for myself, kids, and now my dad. I have never encountered a physician as attentive and connected as Dr. Ritter.

Reviewed on Jun 13, 2019

Dr Ritter helps both of us understand better ways of treatment at home and explains next steps.

Reviewed on Jun 7, 2019

Dr Ritter was very attentive to our questions and concerns. he had an answer to our concern at our next visit and a prescription to help with the problem.

Reviewed on Jun 7, 2019

Dr. Ritter took the time to talk with us and answer any questions and concerns about starting the new medication. He explained the purpose for the new medication, the possible benefit as well as the possible reaction to the drug.

Reviewed on Jun 6, 2019

Doctor Ritter is incredible. He listens to me and gives feedback. He seems concerned about my overall health and well being. He is the best.

Reviewed on May 23, 2019

Doctor Ritter is ONE IN A ZILLION!! What a caring and compassionate man. In today's age, it's almost impossible to find a doctor that really listens and cares about their patients. I was so relaxed and felt that I truly was being taken care of. My hats off to Cleveland Clinic for having Dr. Ritter on their staff.

Reviewed on May 22, 2019

Dr. Ritter is a caring professional. An excellent listener. Described my problems in a clear and concise manner. Offered going forward treatments to improve my condition. All in all, a real professional.

Reviewed on May 16, 2019

My daughter and I were totally impressed with our first visit to your facility. From the moment we walked through the door until the moment we walked out we received nothing but kindness, professionalism and courtesy. what a fabulous experience it was. Dr. Ritter was amazing. his bedside manner far exceeded anything we could have expected. the kindness he showed my husband will never be forgotten. never before have my daughter and I left an appointment feeling totally informed. just an exemplary experience. 10 stars to Dr. Ritter and the Ruvo Center

Reviewed on May 8, 2019

Dr Ritter was excellent

Reviewed on May 7, 2019

If I were capable, I could not stop writing about how great I think Dr. Ritter is. The same goes for his nurse Moneeka and the MA Maria. And everyone else we encounter from the greeters on the main floor to the staff we encounter/pass on the 2nd floor while in the waiting room, navigating the bathroom area etc. Thank you, Thank you, Thank you! Everyone is beyond great and most have a kind word or interaction with my father. My dad is a good natured guy as it is, but he opens up even more at the Lou Ruvo Center.

Reviewed on May 7, 2019

Dr. Ritter is extremely thoughtful and has the best bedside manner I have ever encountered. My wife and daughter feel the same about Dr. Ritter. The level of trust I have in him is unparalleled.

Reviewed on May 2, 2019

Dr Ritter was very courteous and listened to my problems...he was very helpful and I wish more doctors were like Dr Ritter. Thank you Doctor.

Reviewed on Apr 26, 2019

Dr Ritter provided BY FAR the best.most understandable explanation of my cognitive difficulties. and he felt strongly they were effects of MS. and not dementia or Alzheimers. It's hard to overstate the sense of relief this gave me after 2 years of nervous uncertainty! The reasoning behind his conclusions seemed totally fact based and logical. This was the best appointment I've had at CCleveland clinic.

Reviewed on Apr 26, 2019

My appointment with Dr. My appointment with DR. My appointment with Dr. Ritter was simply ideal and could be a model for all providers. I r

Reviewed on Apr 25, 2019

Dr Ritter saved me from myself. Has severe depressive episode.

Reviewed on Apr 24, 2019

Dr. Ritter is amazing. His concern for his patients is just the best. We are so fortunate to have him as our provider.

Reviewed on Apr 24, 2019

Very nice job by Dr. Ritter. Quite knowledgeable and professional.

Reviewed on Apr 24, 2019

dr Ritter and his staff were polite attentive thorough and each step was done professionally. I was so pleased.

Reviewed on Apr 23, 2019

I appreciated that Dr. Ritter took my concerns seriously. He listened in earnest, looked me in the eyes and made it clear he was there to help. Other day physicians could learn a lot from him.

Reviewed on Apr 19, 2019

Dr. Ritter was great. Excellent listener and communicator

Reviewed on Apr 19, 2019

I appreciated Dr. Ritter looking at me when he spoke with me. He was very kind and respectful.

Reviewed on Apr 5, 2019

Dr Ritter was exceptional! I ama doctor as well and I am very impressed!

Reviewed on Apr 3, 2019

Dr. Ritter is excellent.

Reviewed on Apr 3, 2019

people there were very polite. Dr. Ritter was very good listener and thorough about the reason for my being there. He is doing more to pinpoint the problem than my other physicians. thank you.

Reviewed on Mar 29, 2019

Dr Ritter is a great doctor, with a great attitude, he explains everything so we both can understand. my father has made good strides towards his mental health. Thank you for your help.

Reviewed on Mar 28, 2019

*Dr. Ritter is very concerned, courteous, and respectful.

Reviewed on Mar 27, 2019

Dr Ritter is amazing! I will never change doctors as he has not only met all my needs, but follows up with me to insure I am progressing well.

Reviewed on Mar 14, 2019

My husband has dementia but he keeps saying he likes the Doctor, he is happy the Doctor listened to him.

Reviewed on Mar 12, 2019

An amazing doctor!

Reviewed on Mar 7, 2019

Dr. Ritter is also a very good listener, he pays attention to what you have to say and does not dismiss any of it. He's kind and caring, gentle mannered and well informed.

Reviewed on Mar 6, 2019

first class experience in every way Dr Ritter and staff were excellent

Reviewed on Mar 4, 2019

Dr. Ritter, highly recommended.

Reviewed on Feb 11, 2019

We have never been so impressed with a medical staff as we were at the Cleveland Clinic/Las Vegas. Dr. Ritter is outstanding. Words cannot express how wonderful and professional Dr. Ritter was to my husband. We cannot stop talking about the experience we had at Lou Ruvo. Nothing else in Las Vegas begins to compare. Thank you to Dr. Ritter and the entire staff at Cleveland Clinic Las Vegas.

Reviewed on Jan 30, 2019

Dr. Ritter is amazing. He took so much care and time to explain my mom's condition to her and to me. Very kind, caring-- feels like familly

Reviewed on Jan 29, 2019

it was wonderful. my husband is Pat and I handle everything. dr Ritter was so informative and it helps me to see what to expect so that I can take care of him in the best manner. I recommend the clinic to everyone I know that can use some help with loved ones or even themselves.

Reviewed on Jan 25, 2019

awesome and very personable Doctor. he listens to patients and to my wife's concern who is my care giver as well. very knowledgeable and explains everything about the disease process and management.

Reviewed on Jan 23, 2019

the doctor was very helpful and answered all questions and concerns.

Reviewed on Jan 16, 2019

yes Dr Ritter was thorough and helpful.

Reviewed on Jan 4, 2019

Dr Ritter, as with all of the staff of Cleveland Clinic with whom we interacted, were incredibly kind, helpful and most importantly, knowledgeable.

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