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Aging is inevitable, but how you age is not.

New York City is the greatest city in the world, so you’ve come to the right place to take control of your health. With Cenegenics New York, you can look, feel, and perform better than you have in years.

Your Cenegenics Team

Meet the New York City Cenegenics team, a group of highly skilled anti-aging doctors and Performance Health Coaches dedicated to helping you achieve optimal longevity and longer healthspan. With a focus on integrative medicine and advanced Hormone Replacement Therapy (HRT), our experts address key issues such as low testosterone, erectile dysfunction (ED), hormonal shifts of andropause and menopause and other various age related health symptoms.

We combine the latest scientific advancements with holistic approaches to enhance your health and vitality. Our team is committed to providing personalized care that targets the root causes of aging, empowering you to live a longer, healthier life. Let us guide you on the journey to a more vibrant future.

Physician

Keith Fleischman, DO

Senior Physician Partner - Cenegenics New York City

Dr. Keith Fleischman, Senior Physician Partner at Cenegenics New York, has been practicing medicine for over 28 years. He has a lifelong interest in health and fitness. A graduate of the University of New England College of Osteopathic Medicine in 1984, he completed an Anesthesiology residency at St.Barnabas Medical Center in Livingston, NJ where e received the Robert Dripps award for the Outstanding Resident in Anesthesiology. He went on to further postgraduate training in Obstetric Anesthesia and Critical Care. He has been selected as a “Top Doc in NJ” in the field in a poll of nurses by New Jersey Magazine and held the position of Section Chief of Obstetric Anesthesia. He continues to be active in teaching physicians and medical students and has an association with Robert Wood Johnson Medical School.

From childhood, he had exposure to Yoga practice and philosophy and trained in Martial Arts – achieving a level of Black Belt proficiency. He continues to be active in both. Presently he still plays and coaches soccer. It is the ability to enable people to achieve lifelong health and fitness – developing and maintaining their ability to perform at their highest level – that fuels his passion for Age Management Medicine. He has personally experienced the difference that a proactive approach to aging can make and this personal success has fueled his passion.

Dr. Fleischman loves to travel, scuba diving, skiing, and hiking. Married to a Brazilian American, he has a home in Brazil and speaks fluent Portuguese. He is also conversant in Spanish.

Physician

Haran Sivakumar, MD

Center Physician - Cenegenics New York City

Haran Sivakumar, MD is a triple board-certified physician with expertise in family medicine, obesity medicine, and addiction medicine. His diverse training and experience enable him to deliver comprehensive and personalized care to each patient, addressing their individual needs and goals.

As a board-certified family medicine doctor and board-certified weight management specialist, Dr. Sivakumar is well-versed in preventive health measures and prescribing lifestyle changes and medications for chronic diseases, weight management, hormone health, and metabolic health optimization. His evidence-based approach ensures patients receive targeted and effective interventions to optimize their health and prevent, manage, and reverse chronic diseases.

As a board-certified addiction medicine physician, Dr. Sivakumar has training in various forms of psychotherapy including MI, CBT, DBT, MET, and EMDR enabling him to address a wide range of mental health concerns. He is also experienced in prescribing psychotropics, ensuring patients receive appropriate and effective treatments for their unique needs.

Physician

Bertha Mayorquin, MD

Center Physician - Cenegenics New York City

Dr. Mayorquin has always been committed to her patients. Her passion began when most of her family developed diabetes Mellitus type 2. Dr. Mayorquin became passionate about helping educate and guide patients on lifestyle modification to prevent complications of chronic disease.

She is also a faculty attending physician and she enjoys mentoring internal medicine residents.

Dr. Mayorquin has become passionate in the field of age management medicine as she has seen that taking a proactive stance to preserve optimal physical, and mental function and quality of life is the most beneficial preventive approach to the aging process and related co-morbidities. She sees age management as the ultimate tool to prevent chronic disease and frailty.

EDUCATION
  • MD from Universidad Autónoma de Guadalajara
  • Internship in Internal Medicine from Jersey City Medical Center, an affiliate of Mount Sinai School of Medicine, New York
  • Internal Medicine Residency from Jersey City Medical Center, an affiliate of Mount Sinai School of Medicine, New York
  • Certified in Age Management Medicine by Cenegenics, Las Vegas, Nevada
  • Board-certified diplomat of the American Board of Internal Medicine

Physician

Joseph Bosiljevac, Jr. MD, PhD, FACS

Center Physician - Cenegenics New York City

Dr. Bosiljevac trained in conventional medicine as a cardiovascular surgeon 40 years ago. He also obtained a doctorate in natural medicine. He mingled conventional medicine with natural alternative methods together for many years. He made a move to New York City more than 13 years ago to develop an age management practice where he quickly found out that body parts wear out. This led Dr. Bosiljevac to build expertise in stem cell treatment.

Starting off with retired NFL and NBA players, he used stem cells to conduct joint and soft tissue therapy. Later, he worked with military special operations members which included systemic treatment for liver and lung problems as well as traumatic brain injury. He then learned to treat autoimmune conditions.

Physician

Benjamin LaFerriere, MD

Center Physician - Cenegenics New York City

EDUCATION
  • Undergraduate: Willamette University, 2000
  • Medical School: Oregon Health and Science University, 2009
  • Anesthesiology Residency: St. Barnabas Medical Center, 2013
CERTIFICATIONS
  • Board Certified in Age Management Medicine, 2015
BACKGROUND
  • General Medical Officer, USAF Reserve: 2004-present
  • Blackhawk Helicopter Pilot: Oregon Army National Guard: 1997-2004

Nutrition & Exercise

Christian Pruitt

Performance Health Coach

Christian comes to our New York City office after working a year and a half as the Performance Health Coach at the Cenegenics Columbus, OH office. He has three years of professional clinical experience from working at an Outpatient Physical Therapy clinic as the Advanced Exercise Physiologist for Kettering Health.

Outside of his passion for health and fitness, Christian loves traveling with friends and family, seeing concerts, attending live sports events (especially NFL or NBA), and relaxing by the beach listening to music.

Member Experience

Brianna Caldwell

Member Experience Coordinator

Brianna has worked in the healthcare industry in a variety of diverse settings for over 7 years, providing both hands-on care and performing administrative tasks for medical professionals. She graduated from Clemson University and is passionate about building relationships and establishing trust with members. Her objective is to ensure members receive the best personalized care possible towards their individual goals. In her free time, she loves to cook and explore the city.

What members say about their Cenegenics experience

I feel better than ever!

When I was reaching my late 40’s I felt like I had less energy and was tired all the time. I just figured that it was normal and didn’t give it much thought until my wife made an appointment for me to go to Cenegenics for a consultation. After the lab results came back I was surprised to find out that I was borderline diabetic and my hormones weren’t at optimal levels. The doctors and nutritionist put me on a plan that got me back on track and now I feel better than ever! I really wish I had done this years ago! Thanks, guys!

Stanley W. Cenegenics, NYC

I feel much better and have the energy

After trying other “wellness” places I felt like I was wasting my money. I was still slightly overweight, didn’t feel well and I was growing ever more frustrated because I knew that it shouldn’t be this way (Im 43 years old). In a last-ditch effort, a friend of mine recommended I go to Cenegenics® over in Manhattan. My first consultation was back in February and I’ve going there ever since. I feel much better and have the energy to keep up with my 11, 8 and 6 year olds. You won’t be disappointed.

Michelle M. Cenegenics, NYC

Hands down, it's the best place I've ever used

I’ve lost 18 pounds and feel great! Now if they can only figure out a way to get rid of my gray………. Love you guys!

Kathleen H. Cenegenics, NYC

Performance Health Assessment

We perform extensive biomarker testing and diagnostics used by our physicians to identify areas for improvement and develop an action-oriented approach to address underlying issues that may be causing low energy, poor focus, inability to lose weight, or inability to sleep.

Risks. Goals. Personal lifestyle. All part of a custom program to achieve optimal health.

Performance Health Program

Members who participate in our program experience dramatic positive changes in their health and energy including decreasing body fat and strengthening muscle, improving insulin and cholesterol levels, increasing physical and sexual vitality, improving stress management, and improving mental sharpness and sleep quality. These measures are objectively monitored and reported.

Get your complimentary, no obligation consultation today

Request a complimentary, 10-minute call to learn more about the program.

Start your transformation to better health now

Join thousands of people who are optimizing their health and seeing real results

A doctor in a white coat discusses a medical form with an older woman wearing glasses and a gray shirt in a bright office setting.

In addition to the diagnostics performed at all Cenegenics Centers, in New York we offer these enhanced services:

Hormone Replacement Therapy

Restore hormonal balance to improve energy, mood, cognitive clarity, libido, and overall vitality, tailored to your unique biological needs.

Vo2 Max

A maximal exercise test to identify vital performance health information and healthspan prediction.

Body Composition (DEXA)

A low-dose X-ray that evaluates the strength and mineral content of your bones and tissue composition of body regions.

Advanced CCTA

A diagnostic evaluation analyzed by Cleerly, a clinically-proven, AI-driven digital platform.

Brain EEG (WAVi)

A measure of the physiologic response to evoke potential to assess neurological performance.

CNS Scan (Computer Neurological)

Non-invasive testing to evaluate brain and nervous system function, helping detect imbalances that affect mood, focus, memory, and cognitive health.

3D MSK Scan (Phy Health)

A 3D analysis of over 1 million data points of the body used to prevent and reduce musculoskeletal injury and improve performance.

CIMT

The carotid artery’s intima and media thickness measured by external ultrasound to identify vascular disease risk.

Genetics Testing

Uncover your unique genetic map to identify how to have the most impact on your healthspan.

Nutrigenomic Testing

Analyze how your genes influence nutrient metabolism to create a personalized plan that optimizes your diet, performance, and longevity.

Micronutrient Testing

Uncover cellular levels of various vitamins, minerals, and antioxidants or identify your immunologic response to a varierty of foods.

Heart Disease & Stroke Prevention

Comprehensive cardiovascular screening to identify early warning signs and reduce your risk of heart attack, stroke, and other vascular conditions.

Heart Health Testing

Offering cardiac imaging tests, advanced lipid testing, and genetic and biomarker testing to assess heart health.

Bioidentical Hormone Therapy

Helps restore hormonal balance using compounds similar to those naturally produced by your body—an effective, well-tolerated option for treating menopause symptoms.

Exercise Physiology Testing

A comprehensive fitness evaluation that measures your body’s physiological responses to exercise—used to optimize training, performance, and long-term health outcomes.

Pellet Therapy

Bioidentical pellets provide a steady release of hormones to support energy, libido, mental clarity, and metabolic balance.

Start enjoying the many benefits that come with optimal health

an athletic person wearing a VO2 max testing device during a fitness or sports performance assessment.

As a Member of Cenegenics, you can expect positive changes in your health and energy. This includes:

Maximize Energy

Breakthrough a lack of motivation and take control of your day fully energized.

Optimize Body Composition

Reverse a slow and steady weight gain and return to your optimal body composition.

Enhance Sexual Health

Ignite your desire for intimacy, and turn around diminishing sexual performance.

Sharpen Cognition

Renew clarity, “feel like yourself again” and overcome memory lapses or forgetfulness.

Improve Sleep

Enjoy sleeping through the night again wake refreshed.

Reduce Stress

Achieve your peak mental and physical state that will help you successfully manage and control stress in your life

an athletic person wearing a VO2 max testing device during a fitness or sports performance assessment.