Coasties Diabetes is a specialist private practice founded by Nikki Witney, a Registered Nurse and Credentialled Diabetes Educator with international experience across the UK, USA, Canada, and Australia.

We provide expert, personalised diabetes education and management for people living with type 1, type 2, and gestational diabetes on the Central Coast of NSW and beyond. Our multidisciplinary team also offers endocrinology and metabolism services, nutrition support, mental health services, perimenopause and menopause care, and transgender health services — all under one roof.

Our goal is to work with you as a true partner: delivering clear, consistent, and practical support so you feel confident managing your health every single day.

Personalised, One-on-One Care:
You'll see the same health professionals at every visit. That continuity means you get more from each consultation — less time repeating your history, more time focused on your goals.

Technology Expertise:
We provide hands-on training and ongoing support for all major insulin pump and continuous glucose monitoring (CGM) brands available in Australia, including Omnipod, Medtronic, Tandem, Dexcom, and Freestyle Libre. Whether you're starting a new device or upgrading, we'll make sure you feel confident using your technology.

Flexible Appointments across the Central Coast and Sydney: Visit us in person at our clinics in Gosford, Umina Beach, Manly, or Macquarie University — or connect via telehealth from anywhere in Australia at a time that suits you..

Collaborative, Patient-Centered Approach:
We work closely with you, your GP, and your wider healthcare team to ensure you receive coordinated, individualised, high-quality care. Referrals from GPs and specialists are always welcome.