As a Consultant Upper GI/Bariatric Surgeon at Chelsea and Westminster Hospital NHS Foundation Trust and an Honorary Senior Clinical Lecturer at Imperial College London, I have more than 14 years of experience in the field of clinical medicine and surgery. I have a DPhil from the University of Oxford and have completed fellowships in advanced laparoscopy and bariatric surgery at the Cleveland Clinic and Phoenix Health. I am also an Associate Director of the International Bariatric Club, where I direct the IBC Oxford University World Congress www.ibcclub.org. My core competencies include bariatric, foregut, biliary and emergency abdominal surgery, diagnostic and therapeutic Upper GI endoscopy, medical education, and research. I am passionate about advancing the knowledge and practice of bariatric surgery and improving the outcomes and quality of life of patients with obesity and metabolic disorders.
Selected publications from PubMed
Accentuation of the Angle of His is Associated with Reduced GERD without Affecting Weight Loss up to 12 Months after Sleeve Gastrectomy (LSG) : A Retrospective Single-Center Cohort Study.
Ahmad SS, Khwaja H, Mazahreh T, Ahmed AR, Ahmad SJS
Obes Surg. 2026 Jun;36(6):3027-3036 doi: 10.1007/s11695-026-08703-4.
Impact of metabolic and bariatric surgery on the paediatric & adolescent metabolome: A systematic review and meta-analysis.
Mitra AT, Wing O, Das B, Gomez NF, Khwaja H, Parmar C, Fehervari M
Sci Rep. 2025 Oct 16;15(1):36169 doi: 10.1038/s41598-025-20078-7.
International expert consensus on the current status and future prospects of artificial intelligence in metabolic and bariatric surgery.
Kermansaravi M, Chiappetta S, Shahabi Shahmiri S, Varas J, Parmar C, Lee Y, Dang JT, Shabbir A, Hashimoto D, Davarpanah Jazi AH, Meireles OR, Aarts E, Almomani H, Alqahtani A, Aminian A, Behrens E, Birk D, Cantu FJ, Cohen RV, De Luca M, Di Lorenzo N, Dillemans B, ElFawal MH, Felsenreich DM, Gagner M, Galvan HG, Galvani C, Gawdat K, Ghanem OM, Haddad A, Himpens J, Kasama K, Kassir R, Khoursheed M, Khwaja H, Kow L, Lainas P, Lakdawala M, Tello RL, Mahawar K, Marchesini C, Masrur MA, Meza C, Musella M, Nimeri A, Noel P, Palermo M, Pazouki A, Ponce J, Prager G, Quiróz-Guadarrama CD, Rheinwalt KP, Rodriguez JG, Saber AA, Salminen P, Shikora SA, Stenberg E, Stier CK, Suter M, Szomstein S, Taskin HE, Vilallonga R, Wafa A, Yang W, Zorron R, Torres A, Kroh M, Zundel N
Sci Rep. 2025 Mar 18;15(1):9312 doi: 10.1038/s41598-025-94335-0.
Five-Year Outcomes of Bariatric Surgery vs. Conservative Weight Management in People with HIV: A Single-Center Tertiary Care Experience.
Fehervari M, Mitra AT, Sargsyan N, Davison N, Turner M, Efthimiou E, Khwaja H, Fakih-Gomez N, Bonanomi G
Obes Surg. 2024 Oct;34(10):3594-3605 doi: 10.1007/s11695-024-07443-7.
Metabolic and Bariatric Surgeon Criteria-An International Experts' Consensus.
Kermansaravi M, Chiappetta S, Shikora SA, Musella M, Kow L, Aarts E, Abbas SI, Aly A, Aminian A, Angrisani L, Asghar ST, Bashir A, Behrens E, Billy H, Boza C, Brown WA, Caina DO, Carbajo MA, Chevallier JM, Clapp B, Cohen RV, Jazi AHD, De Luca M, Dilemans B, Fried M, Gagner M, Neto MG, Garneau PY, Gawdat K, Ghanem OM, Al Hadad M, Haddad A, ElFawal MH, Herrera MF, Higa K, Himpens J, Husain F, Kasama K, Kassir R, Khoursheed M, Khwaja H, Kristinsson JA, Kroh M, Kurian MS, Lakdawala M, LaMasters T, Lee WJ, Madhok B, Mahawar K, Mahdy T, Almomani H, Melissas J, Miller K, Neimark A, Omarov T, Palermo M, Papasavas PK, Parmar C, Pazouki A, Peterli R, Pintar T, Poggi L, Ponce J, Prasad A, Pratt JSA, Ramos AC, Rezvani M, Rheinwalt K, Ribeiro R, Ruiz-Ucar E, Sabry K, Safadi B, Shabbir A, ShahabiShahmiri S, Stenberg E, Suter M, Taha S, Taskin HE, Torres A, Verboonen S, Vilallonga R, Voon K, Wafa A, Wang C, Weiner R, Yang W, Zundel N, Prager G, Nimeri A
Obes Surg. 2024 Sep;34(9):3216-3228 doi: 10.1007/s11695-024-07395-y.
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