About Us

Ratanui Medical has been a group practice in Henderson for over 35 years with a long history of commitment to provide medical care to the community. The practice moved from Ratanui Street to Lincoln Road in 1989 to be in a purpose built building. The four principal doctors are Dr Clive Stone, Dr John Caldwell, Dr Chris Wong and Dr Joanna Lang working with GP registrars and a team of nurses and administration staff.

  • Dr John Caldwell
    John can now enjoy looking after his patients without the pressure of looking after rest home patients. He sets an example to his patients by exercising regularly on his 18-speed bicycle.
  • Dr Chris Wong
    Chris is a professional teaching fellow with the University of Auckland and teaches medical students. Rather than delivering babies he now performs vasectomies.
  • Dr Joanna Lang
    Joanna is originally trained in Poland and has an interest in woman and child health. She is fluent in Polish and likes the performance arts.
  • Dr Sasha Baijnath
    Sasha is originally from South Africa having immigrated to NZ over 10 years ago. She has many years of GP experience snd is committed to quality patient care. Fashion is one of her keen interests.
  • Dr Cassie Granek
    Cassie is originally from Australia and has now made West Auckland her home. She is interested in travel medicine, Maori and Pacific Island health, and has worked in the past with the indigenous cultures of Australia and East Timor.
    (Currently on maternity leave)
  • Dr Saville Marquis
    Saville is an overseas trained doctor. After becoming registered in NZ, he has worked in Whangarei Hospital and a clinics in West Auckland including Ratanui Medical Centre as a GP Registrar where has returned to Ratanui to work full time. Saville loves sports and in particular cricket.