Dr. Ania Jastreboff, MD
Not yet claimedEndocrinologist, Diabetes doctor, Weight loss doctor · Physician (MD)
New Haven, CT · Telehealth in 0 states
Harvey and Kate Cushing Professor of Medicine (Endocrinology) and Pediatrics at Yale, Director of the Yale Obesity Research Center and Co-Director of the Yale Center for Weight Management; treats obesity, prediabetes, insulin resistance and type 1/2 diabetes.
About Dr. Ania Jastreboff, MD
Updated Sep 20, 2026 · next review Dec 19, 2026Dr. Ania Jastreboff is an endocrinologist in New Haven, Connecticut, who treats both adults and children. Her Yale Medicine profile says she focuses on obesity medicine and weight management, and also cares for people with prediabetes, insulin resistance, metabolic syndrome, and type 1 and type 2 diabetes.
She trained in both adult and pediatric endocrinology and earned a PhD in the neurobiology of obesity during her fellowship. Yale lists her as board certified in five areas: endocrinology, pediatric endocrinology, obesity medicine, internal medicine, and pediatrics. She is the Harvey and Kate Cushing Professor of Medicine and a Professor of Pediatrics at Yale School of Medicine, and founding director of the Yale Obesity Research Center (Y-Weight).
She is a lead investigator on clinical trials of newer obesity medicines that work through gut hormones, including tirzepatide. She helped develop the 2016 AACE/ACE obesity care guidelines, has served on the Board of Governance for The Obesity Society and as a director of the American Board of Obesity Medicine, and received The Obesity Society's 2023 Clinician of the Year Award.
Federal Open Payments records list about $478,746 in industry payments to her across 443 records from 2021 to 2025, with the largest amounts from Eli Lilly and Novo Nordisk. Payments from drug companies to doctors who run clinical trials and speak at conferences are common and legal, but patients may want to know about them.
- Board certified in five specialties
- Yale lists board certification in endocrinology, pediatric endocrinology, obesity medicine, internal medicine, and pediatrics. medicine.yale.edu
- Treats adults and children
- Her Yale Medicine profile describes her as an adult and pediatric endocrinologist focused on obesity medicine and weight management, prediabetes, insulin resistance, metabolic syndrome, and type 1 and type 2 diabetes. yalemedicine.org
- Dual fellowship plus PhD
- She completed a combined fellowship in adult and pediatric endocrinology and earned a PhD in the neurobiology of obesity during that time. endocrine.org
- Leads Yale obesity center
- She is founding director of the Yale Obesity Research Center (Y-Weight), co-director of the Yale Center for Weight Management, and medical director of the Yale Stress Center. medicine.yale.edu
- Obesity drug trial researcher
- She is a lead investigator and author on trials of gut hormone-based obesity treatments, including tirzepatide, a GIP/GLP-1 receptor agonist. medicine.yale.edu
- Helped write obesity guidelines
- The American Board of Obesity Medicine credits her with helping develop the 2016 AACE/ACE clinical practice guidelines for comprehensive care of patients with obesity. abom.org
- Obesity Society award
- She received the 2023 Clinician of the Year Award from The Obesity Society, which recognizes excellence in the practice of obesity medicine. medicine.yale.edu
- Society leadership roles
- She has served on the Board of Governance for The Obesity Society and as a director of the American Board of Obesity Medicine. medicine.yale.edu
- Book with Oprah Winfrey
- Yale News reported in March 2026 that she co-wrote a book with Oprah Winfrey about how people think about health, weight, and obesity; the two discussed it at the 92nd Street Y in New York in January 2026. news.yale.edu
- Practice location and NPI
- Her NPI (1780788349) has been registered since September 2006, with a practice address at 333 Cedar St, New Haven, CT. npidb.org
Worth knowing
- CMS Open Payments records list about $478,746 in industry payments across 443 records from 2021 to 2025. The largest reported payers were Eli Lilly and Company (about $163,984), Novo Nordisk AS (about $121,064), Amgen (about $44,980), Novo Nordisk Inc (about $35,525), and Boehringer Ingelheim (about $24,893). These companies make or develop obesity and diabetes drugs. Such payments are common and legal, and often relate to research and speaking work. openpaymentsdata.cms.gov
- Her medical school year (University of Maryland School of Medicine, 2002) appears only on third-party directory listings and was not confirmed from a primary source in this research. doctor.webmd.com
- Her work is cited in the Lancet Diabetes & Endocrinology Commission on clinical obesity, but membership on that Commission could not be verified. thelancet.com
Industry payments (CMS Open Payments)
Open the CMS recordFederal law requires drug and device companies to report what they pay clinicians: meals, travel, speaking, consulting, and research. Payments are common and legal; the point is that you can see them.
2021 to 2025
$478,746
443 payments
| 2021 | $43,289 |
| 2022 | $78,666 |
| 2023 | $114,143 |
| 2024 | $96,110 |
| 2025 | $146,537 |
Top payers
- Eli Lilly and Company$163,984
- Novo Nordisk AS$121,064
- Amgen Inc.$44,980
- Novo Nordisk Inc$35,525
- Boehringer Ingelheim Pharmaceuticals, Inc.$24,893
Payment types
- Consulting Fee$279,466
- Travel and Lodging$162,525
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$15,265
- Food and Beverage$12,022
- Honoraria$9,468
A word of caution about these numbers
A payment does not mean your doctor is compromised or acting unethically. Most of these entries are drug samples left for patients, or lunch brought in for the office staff, and the amounts are usually small. Research funding and speaking at medical meetings are also normal parts of a clinical career.
As a rough guide, a total under $15,000 a year is usually not a concern. Much larger sums, especially from one company whose product your doctor recommends to you, are worth asking about. You are allowed to ask.
Sources: yalemedicine.org · medicine.yale.edu · medicine.yale.edu · ynhh.org · endocrine.org · abom.org · x.com · npidb.org. Something wrong or out of date? Tell us and we will correct it.
Summary prepared with AI assistance from the public sources linked above, reviewed every three months. It is not a review, a rating, or an endorsement.
Practice location
Yale Center for Weight Management / Yale Obesity Research Center (Y-Weight)
789 Howard Avenue, Dana Clinic Building, Fl 2 (Yale Diabetes Clinic)
New Haven, CT 06519
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