Optimal Weight for Life (OWL) Program | Meet our Team

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David Ludwig, MD, PhD
Founder and Senior Physician

Amy Fleischman, MD, MMSc

Melissa Crocker, MD
Director, Type 2 Diabetes Program

Maryanne Lewis, MSN, PNP-BC
Robert Markowitz, MD
Erinn Rhodes, MD, MPH

Clinical Nutrition

Kelsea Forrester, RD, LDN
Leslie Mattimore, MS, RD, LDN (lead dietitian)
Suzanne Rostler, MS, RD, LDN
Sharon Weston, MS, RD, LDN

Behavioral Medicine

Lori Fishman, PsyD
Amanda Rauf, PsyD
Abigail Seibert, PhD (lead psychologist)


Steven Coletti
Resource Specialist

Joyceanna Fidalgo
Ambulatory Clinic Supervisor

Kelsea Forrester, RD, LDN
Program Coordinator, OWL Exercise Programs

Sarah Picard, MA, MEd
Community Programs Manager, Exercise Programs Manager

Leona (Adrienne Stephanie) Ponce
Program Coordinator II

Melissa Crocker, MD

Melissa Crocker, MD, MBA

Assistant in Medicine, Type 2 Diabetes Program Director

Department: Endocrinology

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Amy Fleischman

Amy Fleischman, MD, MMSc

Assistant in Medicine; Director, Optimal Weight for Life (OWL) Program; Assistant Clinical Director, Ambulatory Endocrinology

Department: Endocrinology

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Maryanne Lewis MSN CP

Maryanne Lewis

Department: Endocrinology

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David Ludwig

David Ludwig, MD, PhD

Senior Physician in Medicine; Director, New Balance Foundation Obesity Prevention Center Director, Optimal Weight for Life (OWL) Program Senior Physician in Medicine; The John Fielding Crigler, Jr. & Mary Adele Sippel Crigler Chair in Pediatric Endocrinology

Department: Endocrinology

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Robert Markowitz, MD

Assistant in Medicine

Department: Endocrinology

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Erinn Rhodes

Erinn Rhodes, MD, MPH

Assistant in Medicine; Director, Endocrinology Healthcare Research and Quality Director, Type 2 Diabetes Program

Department: Endocrinology

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