LIWLI - Long Island Weight Loss Institute
Physician-Supervised Medical Weight Loss on Long Island

Physician-Supervised Medical Weight Loss in Smithtown

A personalized, doctor-led weight-management program - medical evaluation, ongoing physician supervision, and treatment options tailored to you. Most insurance plans accepted; we verify before you pay anything.

  • Obesity Medicine Specialist Since 2001
  • Published in American Journal of Medicine
  • 25+ Years in Practice
  • Most Major Insurance Plans Accepted
Call Now (631) 257-3626

*Must be a participating insurance plan. If insurance is accepted, the initial cost is a $50 technology fee plus your copay. Follow-up visits are your copay plus a $35 technology fee. Call for details.

Without insurance coverage, or for virtual consultations: Initial consultation $250, follow-up $130

4.9 / 5200+ Patient Reviews
Dr. Michael S. Kaplan, DO - patient consultation
Patient Outcomes

Before & After

Real patient transformations from our practice.

Diane - weight loss success
Chris - weight loss success
Donna - weight loss success
Wendy - weight loss success
Kathleen - weight loss success
Danielle - weight loss success
Patricia - weight loss success
Josephine - weight loss success
Mark N. - weight loss success

Physician-Supervised Care

Our treatment outcomes are tracked through body composition analysis at every visit. With ongoing physician supervision, many patients achieve meaningful, sustainable progress. Individual results vary.

Personalized treatment plan

Built around your medical history, health profile, and individual goals.

Supervised by your physician

Progress reviewed at every visit through body composition analysis.

Sustainable lifestyle change

Designed for long-term maintenance with ongoing care. Individual results vary.

*Individual results may vary.

Physician evaluating a patient
Years in practice
25+
Patient Eligibility

You Qualify for Medical Weight Loss If:

  • Your BMI is 30 or higher

    You're medically classified as obese.

  • Your BMI is 27+ and you have diabetes, high blood pressure, sleep apnea, or high cholesterol

    Insurance often covers treatment.

  • Diets haven't worked long-term

    Weight loss is biological, not willpower.

Don't know your BMI? Your doctor will calculate it at your first visit.
Call (631) 257-3626
Treatment Options

Personalized Medical Weight-Loss Treatment Options

Every plan is built and supervised by a physician who specializes in obesity medicine.

M
Medical Evaluation
STEP ONE

Full medical history review, labs, and body composition analysis to determine candidacy.

P
Personalized Plan
STEP TWO

Your physician selects the treatment approach that fits your health profile and goals.

S
Ongoing Supervision
STEP THREE

Weekly physician visits track progress and adjust your plan as needed.

L
Long-Term Care
STEP FOUR

A maintenance strategy designed for lasting results. Individual outcomes vary.

How it works

Your physician builds a personalized treatment plan and reviews your progress at every visit.

What to expect

Many patients achieve meaningful, sustainable weight loss through ongoing physician supervision. Individual results vary.

Who it's for

BMI ≥30 or BMI ≥27 with related conditions such as type 2 diabetes or hypertension.

Progress monitoring

Your plan is reviewed and adjusted by your physician at every visit based on your results.

Insurance Information

Insurance often covers physician-supervised weight-management visits. We verify your benefits before your first visit so there are no surprises.

Your treatment plan is determined only after an individual medical evaluation by your physician. Progress is reviewed at every visit. Not everyone is a candidate.

Our Process

What Happens When You Start

From your initial evaluation through ongoing care, every step of your treatment is guided by a physician who specializes in obesity medicine.

Physician conducting initial patient evaluation
01
30–45 MINUTES

Initial Consultation

  • Medical Evaluation

    Your physician reviews your complete medical history, health background, and weight-related health conditions.

  • Body Composition Analysis

    We assess fat mass, lean muscle mass, and hydration levels - providing a more complete picture than weight alone.

  • Individualized Treatment Plan

    Based on your clinical profile, your physician designs the treatment plan that best fits your health and goals.

  • Insurance Verification

    Our office confirms your coverage details so there are no surprises regarding costs.

There is no obligation to proceed. You and your physician will determine together whether the program is appropriate for your needs.
Physician reviewing patient vitals during follow-up
02
ONGOING CARE

Weekly Doctor Visits

  • Physician-Led Care

    Each visit is with a physician or nurse practitioner - not a health coach or unlicensed counselor.

  • Plan Adjusted Weekly

    Your plan is adjusted incrementally based on your clinical response and progress.

  • Progress Tracked

    Body composition analysis at every visit measures changes in fat mass versus lean tissue.

Patient reviewing progress with physician
03
LONG-TERM OUTCOMES

Results You Can Measure

  • Steady, Physician-Guided Progress

    With ongoing supervision, many patients achieve consistent, sustainable weight reduction. Individual results vary.

  • Improved Health Markers

    Many patients experience improvements in blood pressure, glycemic control, joint comfort, and energy levels.

  • Long-Term Maintenance Plan

    Our physicians work with you to develop a long-term strategy to sustain your results.

Long Island Weight Loss Institute medical staff and Dr. Kaplan
Dr. Michael S. Kaplan, DO
Medical Director, Long Island Weight Loss Institute
About Our Practice

Our Smithtown Medical Team

Dr. Kaplan founded the Long Island Weight Loss Institute and developed its individualized treatment protocols. He pioneered a physician-led approach that uses body composition analysis - not just scale weight - to guide treatment decisions at every visit.

  • Obesity Medicine Specialist Since 2001

    Dedicated to the practice of obesity medicine for over two decades

  • 25+ Years in Practice

    Over two decades of experience treating patients with obesity and related conditions

  • Published in American Journal of Medicine

    Clinical findings published in a leading peer-reviewed medical journal

  • Trained over 2,000 healthcare providers

    Has educated thousands of medical professionals in weight management protocols

  • One of the first board-certified obesity medicine physicians in 2005

    Among the earliest physicians in the country to achieve board certification in obesity medicine

All patient visits are conducted by licensed medical providers. No health coaches or unlicensed staff.
Insurance & Billing

Insurance Coverage for Weight Loss Treatment

We participate with most major insurance carriers. Coverage eligibility depends on your specific plan and clinical qualifications.

Services typically covered by insurance:
  • Initial physician consultation
  • Weekly follow-up visits
  • Physician-supervised treatment plans, depending on your plan
Potential out-of-pocket costs:
  • • Program and technology fees (varies by plan)
  • • Certain treatment-related costs, depending on your plan
  • • Meal replacement products, if applicable
Cost Transparency

We verify your insurance benefits before your first appointment. You will know your expected costs prior to beginning treatment.

Questions about coverage? Call (631) 257-3626

Most Insurance Accepted

Verify Your Insurance Coverage

We'll check your benefits and call you within 1 business day to schedule your consultation.

Free VerificationNo ObligationHIPAA Compliant

By submitting this form, you agree to receive calls and text messages from Long Island Weight Loss Institute regarding your inquiry. Reply STOP to opt out.

Patient Outcomes

Patient Progress

Diane / Weight Loss Success Story

““
I've been coming here since July of 2012 and I have been losing weight ever since. I feel so much better since I lost the weight. I have much more confidence, much more "get up and go," much more energy… I feel great!
Video Testimonial
Diane - weight loss success story

*Individual results may vary.

G
4.9· 200+ patient reviews
Frequently Asked Questions

Questions About Treatment

Schedule An Appointment

Ready to Start Your Medical Weight-Loss Journey?

Your physician will evaluate your health, explain options, and create a treatment plan.

Call Now (631) 257-3626
Insurance-covered consultations available.* See pricing above.
Schedule Your Visit

Book Your Consultation

Fill in your details and we'll call you to schedule your first appointment.

Free VerificationNo ObligationHIPAA Compliant

By submitting this form, you agree to receive calls and text messages from Long Island Weight Loss Institute regarding your inquiry. Reply STOP to opt out.

Location

Convenient Smithtown Location

Long Island Weight Loss Institute
329 Middle Country Road
Smithtown, NY 11787
  • Free parking
  • Private consultation rooms
  • Full medical & lab facilities
  • Professional environment
Virtual Consultations Available
Many appointments can be completed by video from home.
Call to Schedule (631) 257-3626
Call Now