% Weight Loss Percentage
Dr. Rekha Kumar, M.D., M.S.
✓ Board-Certified Endocrinologist ✓ ABOM Diplomate

Dr. Rekha Kumar, M.D., M.S.

Lead Medical Reviewer & Obesity Medicine Specialist

Connect on LinkedIn Weill Cornell Medicine | New York, NY

About Dr. Rekha Kumar

Dr. Rekha Kumar, M.D., M.S. is an internationally recognized physician leader in endocrinology, diabetes, metabolism, and clinical obesity medicine. She serves as an Associate Professor of Clinical Medicine at Weill Cornell Medicine and an Attending Physician at NewYork-Presbyterian Hospital.

Dr. Kumar previously served as the Medical Director of the American Board of Obesity Medicine (ABOM), where she oversaw national clinical standards and physician examination development for the discipline of obesity medicine. She serves as the Lead Medical Reviewer for Weight Loss Percentage, ensuring that all calculation engines, clinical milestone guidelines (5%, 7%, 10% thresholds), pediatric nomograms, and energy deficit projections align with peer-reviewed medical standards from the ADA, AHA, Endocrine Society, and AAP.

🎓 Education & Training

  • Fellowship: Endocrinology, Diabetes & Metabolism — NewYork-Presbyterian / Weill Cornell Medical Center & Memorial Sloan Kettering Cancer Center
  • Residency: Internal Medicine — NewYork-Presbyterian / Weill Cornell Medical Center
  • Doctor of Medicine (M.D.): New York Medical College
  • Master of Science (M.S.): Institute of Human Nutrition, Columbia University
  • Bachelor of Arts (B.A.): Duke University

📜 Board Certifications

  • Endocrinology, Diabetes & Metabolism: American Board of Internal Medicine (ABIM)
  • Obesity Medicine: Diplomate, American Board of Obesity Medicine (ABOM)
  • Internal Medicine: American Board of Internal Medicine (ABIM)
  • New York State Medical License: Active & in Good Standing

Medical Review Standards & E-E-A-T Commitment

At Weight Loss Percentage, our primary mission is to deliver mathematically exact, scientifically validated health calculators without predatory paywalls or unverified claims. Dr. Kumar oversees our strict four-pillar medical review protocol:

  1. Physiological Formula Verification: Validating that Mifflin-St Jeor, Katch-McArdle, US Navy Body Fat, Total Body Weight Loss (TBWL), and Excess Weight Loss (EWL) formulas reflect current clinical consensus.
  2. Clinical Decision Thresholds: Reviewing landmark health milestones—including the AHA/ADA 5% metabolic improvement marker, the 10% cardiovascular milestone, and the AAP 7%–10% pediatric action levels.
  3. Evidence-Based Guidance: Ensuring all recommendations on safe weekly deficits (0.5%–1.0% per week) protect lean muscle mass and prevent metabolic slowing.
  4. Patient Safety & Disclaimers: Reviewing pediatric, bariatric, and GLP-1 guidance to provide clear medical boundaries and consult-your-doctor recommendations.

Calculators & Guides Medically Reviewed by Dr. Kumar

Weight Loss Percentage Calculator

Exact % lost, starting weight baseline & milestone analysis.

 Newborn Weight Loss Calculator

AAP 5%, 7%, and 10% pediatric decision thresholds.

 Body Fat Percentage Calculator

US Navy method & lean mass preservation modeling.

 Calorie Deficit & BMR Calculator

Mifflin-St Jeor metabolic expenditure targets.