Donna Barleycorn
Advanced Nurse Practitioner & Weight Management Specialist

Advanced Nurse Practitioner
PRESCRIBER & HEALTHY WEIGHT COACH

Donna Barleycorn (MSc, BSc Hons, NMP/RN) is a highly experienced Advanced Nurse Practitioner and Independent Prescriber. Having qualified in 1998, Donna brings over 25 years of dedicated healthcare experience across both the NHS and private sectors. As a published clinical and academic author, and an active contributor to editorial advisory boards for leading clinical journals, she stays at the absolute forefront of evidence-based medical practices.

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Specialising in clinical weight loss at Calleva Clinic, Donna provides expert video consultations, safe prescribing, and monthly coaching for patients using Mounjaro (tirzepatide) and Wegovy (semaglutide). She is deeply passionate about empowering individuals to optimise their health and take control of their weight loss journey through tailored, personalised treatment plans.

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Donna believes that successful, sustainable weight loss goes far beyond the injection—it requires understanding the root causes of weight gain, hormonal balance, and metabolic health. She delivers ongoing support with empathy, warmth, and a strong focus on building trust, ensuring every patient feels heard and supported every step of the way.

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Donna is also the Clinical Director of her own practice, the Barleycorn Clinic in Henfield, West Sussex. Through her partnership with the CQC-regulated Calleva Clinic (based in Tadley, Hampshire), Donna delivers safe, clinician-led weight loss treatments to patients locally across the South East, and remotely via video consultation to patients anywhere in England, complete with free cold-chain home delivery.