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Dr. Ethan Lazarus: Medical Weight Loss Doctor Serving Denver & Greenwood Village
National Authority on Obesity Medicine & GLP-1 Therapy (Semaglutide & Tirzepatide)
It’s About Biology, Not Willpower. And I’m Here to Help.
If you have felt frustrated by yo-yo diets or constant “food noise,” you are not alone. As a dedicated weight loss doctor serving Denver, Centennial, and Highlands Ranch, my life’s work has been proving that obesity is a complex disease driven by biology, not a lack of character.
I am a double board-certified specialist in Obesity Medicine and Family Medicine. Unlike online-only subscription services, my practice in Greenwood Village offers personalized, face-to-face medical care. My team and I look at the whole picture—lab tests, body composition, and metabolic history—to help patients from Aurora to Lone Tree achieve sustainable results.
Expert Management of Wegovy®, Zepbound®, and Metabolic Health
As the Past President of the Obesity Medicine Association, I am committed to using the most advanced scientific tools available. My role is to serve as your medical partner, customizing a plan that may include FDA-approved anti-obesity medications such as semaglutide (Wegovy®) and tirzepatide (Zepbound®).
Why Choose a Board-Certified Weight Loss Doctor?
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Safety: We carefully monitor GLP-1 usage to manage side effects and ensure safety.
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Precision: We tailor dosages based on your unique metabolic response.
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Comprehensive Care: Medication is most effective when paired with the nutrition and behavioral support provided by our team of Weight Loss Dietitians.
Whether you are driving in from Littleton or Englewood, our goal is to provide the accountability and expertise you need to turn temporary weight loss into lifelong health.
What Our Patients Say About Dr. Lazarus | Denver’s Weight Loss Doctor
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The Medical staff are highly trained professionals and extremely knowledgeable. They take their time and listen to you and consider all factors. They explain options available to you very… read more well along with the pros and cons. They are wonderful with follow up and support. I can’t say enough about this Clinic.
Sandy
January 8, 2026Everyone who works here is invested in my weight loss. For any struggle I’m having they have a suggestion that helps me turn it around. I’ve tried every weight loss… read more plan you can imagine from WW (seriously at least 20 times ) keto, shakes, intermittent fasting, you name it. I’m 72 so been around for all the fads. They’ve been doing this a long time and keep up with current trends and science. It’s a medical weight loss clinic. Yes, I’m paying for their services and it’s worth every penny. For the first time I feel that I can do this and am doing it.
Julie
December 23, 2025I feel blessed to have found Dr. Ethan Lazarus, medical obesity specialist, and Mary Ellen, nutritionist, at CNC. The support, knowledge, communication and commitment to the patient far surpasses my… read more experience in any other medical setting. They guided my through two successful joint replacements while maintaining a stable weight and continued good health. I highly recommend this practice to anyone who chooses to improve their health and well being.
Larry
December 10, 2025 -
I feel blessed to have found Dr. Ethan Lazarus, medical obesity specialist, and Mary Ellen, nutritionist, at CNC. The support, knowledge, communication and commitment to the patient far surpasses my… read more experience in any other medical setting. They guided my through two successful joint replacements while maintaining a stable weight and continued good health. I highly recommend this practice to anyone who chooses to improve their health and well being.
Larry
December 10, 2025 -
Betsy
October 24, 2025 -
I hate how long it took me to find out about this place. I’ve been working with Stacy Gill (Nutritionist) and Jamie Shriver (PA) and they are both incredible. I… read more feel more informed and supported than ever. I’ve already recommended this place to all of my friends!
Jocelyn
October 23, 2025Mary
October 21, 2025 -
Best weightless clinic I have ever been a part of. The staff is very friendly and helpful. I have lost 68 lbs and have kept it off for over 2… read more years.
Tonyetta
October 9, 2025I have been with CNC for 4 years. I started weighing 302 lbs, having suffered 26 surgeries and endured 22 years in law enforcement. Needless to say, when… read more I arrived, I was desperate. My health was in bad shape; my mental health was worse. I was looking at additional back surgeries and was gaining additional weight. I met Dr. Lazarus, my first meeting with him he took the time and explained what was happening both physiologically and psychologically. He told me that what was happening wasn’t my fault. He guided me through the process, created a plan, first getting me through my next surgeries. Once completed, we created a long-term plan under close observation. It began to work. Weight slowly dropped off, my energy creeped back and the aches and pains I was feeling began subsiding. Ultimately due to my injuries that I had sustained we felt the route of surgery was best and I underwent a gastrectomy (sleeve) that along with Dr. Lazarus and Jamie Shriver, I have lost 105 lbs. and kept 93 lbs. off for 2 years. They work with me every month, they know me, my family and they never forget that I am a human being. They care and they have my TRUST. Please don’t suffer any longer. These people can and will help you. Trust them, I am so happy that I did. I know I will have more time with my family because I did. Michael Wagner
Michael
September 25, 2025 -
Cannot say enough about Clinical Nutrition. Their staff truly cares. I tried everything prior and I would yo-yo. I have lost 75 lbs with them and have kept it off… read more for almost a year.
Nikki
September 24, 2025Very good experience with the staff and nutritionist. I’ve taken very good care of me and help me lose significant weight over the past several years.
Steve
September 23, 2025The staff at clinical nutrition center are very knowledgeable, empathetic, professional and supportive. I like that they are realistic with information, guidance and setting goals. They educate you … read more with the most up to date research in health and weight loss. I have always felt the doctors and dietitians were easy to talk to. They support and guide and celebrate your incremental progress. They champion the slow steady life changes that need to happen for you to live a healthier life. CHRIS BARNETT
Chris
August 13, 2025 -
In the world of medical weight loss, I want to share what makes CNC stand out… You won’t find a place with more qualified, experienced and compassionate professionals to… read more work with. They understand that there is so much more to weight loss than medication alone and they are there to help you achieve your healthy lifestyle goals every step of the way!
Erin
April 7, 2025I highly recommend Clinical Nutrition Center if you are considering a weight loss journey. I have lost 54 lbs using a GLP1 medication. They have provided me with… read more additional tools to use with this medication. I’ve not only lost weight but I’ve lost inches. I’m not only stronger, but toned. I feel amazing! Thank you Dr. Heather, Dr. Lazarus and staff for all your support! I’m going into 2025 strong and healthy!!
Annette
December 24, 2024 -
I started with the Clinical Nutrition Center the end of February after being told I needed to lose weight before I could get my knee replacement surgery! After starting with… read more the clinic, I met with Nutritionist, Mary Ellen, weekly and Physician’s Assistant, Jamie, monthly. Everyone at the clinic has been wonderful! They are always encouraging at my weekly weigh-ins. Mary Ellen has been such a great inspiring part of my journey! She has given me a lot of good advice and helpful information. I like the fact that the Nutrition Clinic has always been concerned with my overall health as well as my weight lose. The monthly blood draws and body scans helped me a lot, too. Working with the Clinical Nutrition Center has helped me lose over 100 pounds! My weight has been over 300 pounds for the last 6 years! I now weigh about 206 lbs! My goal is to be under 200lbs and maintain that weight. I know the clinic will help me get there and also maintain my weight lose as well!
Cindi
December 23, 2024Dr. Lazarus is phenomenal. He is an expert across obesity treatments so he is able to find solutions that work for my individual (and changing) circumstances. I have learned so… read more much from him & feel fortunate to have such a capable, compassionate and encouraging practitioner to work with on this journey. Don’t hesitate.
Mary
December 20, 2024Visited the Clinical Nutrition Center in Denver and can’t praise Dr. Lazarus and his team enough. Their genuine approach to understanding individual challenges and crafting tailored solutions was a game-changer… read more for me. No more cycles of dieting and rebounding; just solid, sustainable results. Thanks to Dr. Laz, I’ve found not only better health but a renewed zest for life. Highly recommend!
Brady
August 14, 2023 -
I researched a couple weight loss clinics and I am so glad I landed at CNC. Heather has been beyond helpful, responsive, and compassionate in every way possible. … read more CNC combines nutritional counseling, diet, exercise, and does blood work to make sure that your weight loss journey is safe and effective. Everyone that works here is just wonderful and the staff goes out of their way to make you feel comfortable. I have lost over 40 pounds since I started about a year ago and I am beyond thrilled!
Christine
August 9, 2023I had been to several Denver area weight loss clinics prior to this one and there is just no comparison. Dr. Ethan Lazurus and his entire staff are helpful, kind,… read more knowledgeable and just so easy to work with. They are also very competitive from a pricing perspective, and flexible. I have been going to them off and on for 6+years now and they never make me feel guilty or uncomfortable if I fall of the program, or stop coming regularly. They are always respectful and extremely personable. They always have great recommendations and will share opinions, but are never pushy.
Dene
September 8, 2021I called Dr Lazarus in the middle of the pandemic convinced I had an eating disorder at 69!!!!! He quickly had me understanding that my weight gain and binge… read more eating was biochemical, a component of brain chemistry. This was easy for me to understand because I’m a therapist and it’s a major question I ask in assessing depression. Dr Lazarus is personable, caring, kind and not shaming at all. He adjusted medication and with the help of a wonderful nutritionist, MaryEllen, within 6 months I lost 40 pounds with out being hungry. The staff is supportive, kind, and helps you to understand there is much more going on to weight loss than will power. A lot is determined by changing hormones and brain chemistry. If you are struggling with your weight please give Dr Lazarus a call. You will not regret it. My cholesterol is back to normal, my clothes fit, and my self esteem feels so much better that I’m not to blame. What a team!! Plus, he’s an incredible musician.
Vicki
August 30, 2021
My Commitment to You
My mission is to provide the highest level of care in the field of obesity medicine. Whether you need to lose 20 pounds or more than 100, I am committed to using every evidence-based tool available to help you improve your health, feel better, and rediscover a zest for life. You don’t have to do this alone.
Dr. Lazarus in the news
New York Times
Wall Street Journal
AMA
Endocrine Society
VeryWell MD
Life After (Weight) Loss: With significant weight loss comes complicated feelings
Hone
Medscape
AARP
AARP updated their statement on spotting weight loss scams. Read more here.
Medical Economics
Bariatric Times
Health Monitor
Everyday Health
Journey Talk Live
PWN Health
Are you ready to take the next step?
Your journey to lasting health starts with a simple conversation. Let’s work together to create a customized plan that finally works for you.
*Your free visit can be with one of our Providers or Registered Dietitians. We will answer all of your questions, explain our programs and fees, and figure out if this is a good fit. This can be done in-person, or by phone or video. There are no obligations for this visit. This free visit is only for potential new patients. We are only able to provide care within Colorado.
A National Leader in Medical Weight Loss
- 20+ Years Experience: Serving the Colorado community as a specialized Weight Loss Doctor.
- National Leadership: Past President of the Obesity Medicine Association (OMA), the nation’s largest society of clinicians dedicated to treating obesity.
- Thought Leader: Nationally recognized speaker on the efficacy of GLP-1 medications and metabolic health.
- Local Impact: Helping thousands of patients in the Denver Metro area reclaim their health.
More information on Dr. Lazarus
- American Board of Family Medicine: Since 1999
- American Board of Obesity Medicine: Since 2012 (first year offered)
- Undergraduate: University of Pennsylvania and the Wharton School
- MD: University of Colorado Health Sciences Center
- Residency: Family Medicine, John Peter Smith hospital, Ft. Worth, Texas
- Physician and Owner of Clinical Nutrition Center since 2004, a privately owned medical practice
- President (2021 – 2022) for the Obesity Medicine Association, a society with over 5,000 physicians and other healthcare providers treating obesity
- Past-President (2022 – 2024) for the Obesity Medicine Association
- Secretary-treasurer, Vice-President, President-Elect, Board of Trustees (2014 – 2021) for the Obesity Medicine Association
- Diplomate: American Board of Obesity Medicine
- Board Certified: American Board of Family Medicine
- Specializes in medical weight loss
- Delegate in the American Medical Association
- Healthcare Advocate of the Year. Obesity Action Coalition. November 2018.
- Obesity Medicine Clinician of the Year. Obesity Medicine Association. October 2015.
- Peter G. Lindner Award. Obesity Medicine Association. October 2018.
- Vernon B. Astler Award. October 2013.
New York Times
Few Signs of a Taste for Diet Pills
AMA:
What doctors wish patients knew about anti-obesity medication | American Medical Association
With U.S. obesity rate over 40%, 3 treatment keys for doctors
Person-first, preventive approach needed to tackle obesity
WebMD
Life After Ozempic: What Comes Next
Biggest Weight Gain Now Comes Early in Adulthood
VeryWell MD
Life After (Weight) Loss: With significant weight loss comes complicated feelings
Hone
Wegovy vs Phentermine: Which Is Better for Weight Loss?: It comes down to results, side effects, and affordability.
My Phentermine Stopped Working—Now What?
Medscape
Obesity Medications: Who Needs Priority Access
Launching an Obesity Medicine Practice? Key Considerations
Hanging in the Balance: Reports Aim to Propel Obesity Care Forward
AARP
AARP updated their statement on spotting weight loss scams. Read more here.
Bloomberg
Medical Economics
As this year comes to a close, it offers clinicians a chance to reflect on the current state of obesity medicine and look ahead to what’s next. The COVID-19 crisis will still be top of mind forcing our field to continue to adapt — this will be particularly true for our colleagues involved in obesity treatment. Click here to read more.
Bariatric Times
The culmination of another year offers clinicians a chance to reflect on the current state of obesity medicine and look ahead to the developments on the horizon. Certainly, we can expect our field to continue reacting and responding to the COVID-19 crisis — and this will be particularly true for our colleagues who practice bariatric surgery. Patients with obesity are at a significantly higher risk of adverse health outcomes as a result of COVID-19, and these dedicated healthcare professionals play a vital role in helping to stem one of our country’s most pressing public health concerns. Click here to read more.
Health Monitor
Overcoming medical barriers to weight loss
Prevention
What 10 Obesity Experts Wish You Knew About Weight Loss.
Endocrine Society
Liquid Meal Replacements: Better Than Other Weight Loss Options?
Everyday Health
Why Calling Obesity a Disease Is a Good Thing
Journey Talk Live
Dr. Lazarus was the featured guest on Journey Talk Live, a show hosted by Dr. Nick Slenkovich. Dr. Slenkovich is a plastic surgeon in Highlands Ranch, Colorado. This interview explores the ins and outs of medical weight loss. You can watch the interview on Facebook Now.
Wall Street Journal
Overcoming Misconceptions About Diabetes
PWN Health
Rhythm Pharmaceuticals to offer free genetic testing for rare forms of genetic obesity. Click here to read more.
Personal Information
- Born: Denver, Colorado, raised in Greenwood Village, practiced family medicine in Littleton, and now lives in Lone Tree!
- Married with 3 children
- Enjoys biking, running and skiing
- Accomplished musician – cellist, pianist, composer. Click here for more info…
- Obesity Pillars:
- Appropriate use of the fixed-dose, extended-release combination of naltrexone and bupropion as treatment for obesity in primary care
- OMA President’s perspective: A new journal will help us overcome obesity
- Obesity pillars roundtable: Phentermine – Past, present, and future
- Cancer and Obesity: An Obesity Medicine Association (OMA) Clinical Practice Statement (CPS) 2022
- Future of Obesity Medicine: Fearless 5-year predictions for 2028
- Book Chapters
Latest Clinical Insights from Dr. Lazarus
As a leader in obesity medicine, Dr. Lazarus regularly reviews new clinical data on GLP-1 therapies and metabolic health. View his recent articles below:

Medical Weight Loss Colorado: A Doctor’s Review of the 2026 RFK Jr. Guidelines
- On
- InNutrition
For the last 40 years, the government has told us the same thing: eat less fat, eat moderate amounts of protein, and…

The Oral Revolution: A Denver Medical Weight Loss Guide to the New Wegovy Pill
1. Introduction: A New Way to Treat Weight Loss For the last ten years, the best options for medical weight loss in…

Why New Year’s Resolutions Fail (And Why Metabolic Science Works)
This year, stop relying on willpower and start relying on biology. Here is why medical weight loss succeeds where “January Diets” fail.…

FDA Approves “Oral Wegovy” (A Daily Pill for Weight Loss)
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- InGLP-1, semaglutide, Wegovy
I. Introduction: A New Option for Denver Weight Loss I am writing to share some exciting news for our patients in Greenwood…

Use It or Lose It: How to Use Your FSA/HSA for Medical Weight Loss Before Year-End
Don’t let your tax-free health dollars expire on December 31st. Here is how to invest them in your metabolic health. As we…

Maximizing Your Weight Loss Journey: Essential Lifestyle Habits While on GLP-1 Medications
GLP-1 receptor agonists like Ozempic®, Wegovy®, and Zepbound® have become powerful tools in modern weight management. At Clinical Nutrition Center, we see…
