Meet the Clinical Director
DONNA BARLEYCORN
Advanced Nurse Practitioner Prescriber (NMP/RN) Certified Functional Medicine Clinician (FDN-P) MSc BSc hons Dip HE PGCHE FHEA
CQC Registered Clinic
At Barleycorn Clinic, we provide personalised consultations and treatments either virtually through secure telehealth or from our discreet private clinic in West Sussex. As one of the few CQC Registered clinics in the UK to combine Functional Medicine, HRT & Menopause Care, and a Clinician-Led Medical Weight Loss Clinic within one service, we offer a truly integrated approach to healthcare. Led by an experienced Advanced Nurse Practitioner Prescriber, with GP advisory support in women's health, our multidisciplinary team delivers safe, evidence-based and highly personalised care tailored to your individual health goals.


A nurse practitioner, researcher, and functional medicine clinician
Donna Barleycorn is an experienced Nurse Practitioner Prescriber and Functional Medicine Clinician with over 26 years of NHS and private healthcare experience. Since qualifying as a Registered Nurse in 1998, her career has spanned advanced clinical practice, independent prescribing, emergency medicine, urgent care, higher education and functional medicine, bringing together a breadth of expertise rarely found within a single private clinic.
Alongside her clinical practice, Donna has held senior academic positions as a Clinical Educator, Senior Lecturer and Pathway Lead for MSc Advanced Practice and Independent Prescribing programmes, mentoring the next generation of advanced healthcare professionals. She also provides one-to-one clinical supervision and academic support for independent prescribing students, helping to develop safe, confident and evidence-based prescribers.
Donna has completed advanced postgraduate training in functional medicine, hormone health, gut health and nutritional medicine, and is trained by the British Menopause Society (BMS). She combines evidence-based conventional medicine with a personalised, root-cause approach, integrating advanced laboratory diagnostics, nutrition, lifestyle medicine and hormone optimisation to deliver highly individualised care.
She has also authored clinical publications, presented at national and international conferences, and served on editorial advisory boards for international scientific journals, reflecting her ongoing commitment to clinical excellence and evidence-based healthcare.

Donna's Background
Donna's extensive clinical background, combined with advanced training in functional medicine, hormone health, menopause care, gut health and metabolic medicine, enables her to bridge the gap between conventional healthcare and a root-cause approach to wellbeing. She is passionate about identifying and addressing the underlying drivers of ill health, rather than simply managing symptoms.
Having experienced her own significant health challenges, Donna understands first-hand the impact that chronic symptoms can have on every aspect of life. This personal journey inspired years of postgraduate study, extensive clinical training and ongoing research into functional medicine, women's hormones, nutrition, biochemistry and preventative healthcare. It continues to shape the compassionate, patient-centred philosophy that underpins Barleycorn Clinic today.
As an NMC-registered Nurse Practitioner Prescriber, Donna combines evidence-based medical practice with the principles of functional medicine to deliver highly personalised care.
Her consultations consider the whole person, integrating lifestyle, nutrition, laboratory diagnostics, hormones, gut health, metabolic health and conventional medical assessment to develop treatment plans tailored to each individual's needs.
Every consultation reflects Donna's commitment to clinical excellence, personalised medicine and exceptional patient care. Patients receive a thorough assessment, detailed treatment plan and ongoing support within a CQC-registered private medical clinic, where professionalism, empathy and long-term health optimisation are at the heart of everything we do.

Professional Registrations
Donna Barleycorn, MSc, BSc (Hons), Dip HE, FDN-P, FHEA
Clinical Director | Advanced Nurse Practitioner | Independent Prescriber
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Registered with the Nursing & Midwifery Council (NMC) – Adult Nurse, Specialist Practitioner, Independent Prescriber & Teacher
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Certified Functional Diagnostic Nutrition Practitioner (FDN-P)
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British Menopause Society (BMS) Trained
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Institute for Functional Medicine (IFM) Education
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Advanced DUTCH Hormone & Hormone Replacement Therapy (B/HRT) Training
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SCOPE Certified in Obesity Management
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Registered Practitioner, Aesthetic Complications Expert (ACE) Group
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Enhanced DBS Certified
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ICO Registered
Barleycorn Clinic is a CQC-registered medical clinic, providing medically led, evidence-based care in functional medicine, women’s health, menopause, weight management and medical aesthetics.




