Our structure

13SICK, National Home Doctor Service is Australia's largest network of home visiting doctors. Proudly Australian, our service has a 30 year history of providing urgent medical care after hours when GP Practices are closed. 13SICK combined the strengths of long term industry leaders: Family Care Medical Services; Melbourne Medical Deputising Service; and GPSolutions. More than 7,000 GPs trust 13SICK to look after their patients after hours.

Accredited to the standards of the Royal Australian College of General Practitioners, with Australian General Practice Accreditation Limited and GPAour reputation for quality care is built on the solid foundation of our Clinical Advisory Group.

Clinical Advisory Group

Our Clinical Advisory Group is a team of distinguished Medical Directors from around the country who oversee medical governance, and set and review all clinical policies and procedures. The Group also advises Board and Management and offers valuable mentoring to our team of Doctors.

Clinical Advisory Group Medical Directors

  • Dr Nicholas Demediuk

    Dr Nicholas Demediuk

    MBBS, BEd, FRACGP (LIFE MEMBER), DRANZCOG

    Medical Director - VIC

    • Medical Director, Parkmore Medical Centre and Dr Snip Vasectomy Centre
    • Deputy Director, Professional Services Review
    • Board member, South East Melbourne Primary Health Network, FRACGP (Vic Faculty), AGPAL.
  • Dr Bers Wenck

    Dr Beres Wenck
    MBBS, BEd, FRACGP (HON) FAMA

    Medical Director - QLD

    • Rose-Hunt Award recipient (2012) for outstanding commitment to Australian General Practice
    • AMAQ President's Award (2007) for outstanding contributions to Queensland's health system
    • Past President, Brisbane North Division of General Practice.
  • Dr Umberto Russo

    Dr Umberto Russo
    MBBS, FRACGP 

    GM - Clinical Governance, SA

    • Founding Partner, gpSolutions, Adelaide's leading medical deputising service prior to its merger with 13SICK. National Home Doctor Service
    • 23 years' experience in medical deputising
    • National Representative on various infection control and sterilization committees, including the National Infection Control Guidelines Steering Committee. 
  • Dr Spiro Doukakis

    Dr Spiro Doukakis

    MBBS, FRACGP 

    GM - Clinical Governance, SA

    • Founding Partner, gpSolutions, Adelaide's leading medical deputising service prior to its merger with National Home Doctor Service
    • Acting Medical Director, Western Australia for National Home Doctor Service
    • Vice President, Medical Director, National Association of Medical Deputising (NAMDS).
  • Dr Bernd Lorenzen

    Dr Bernd Lorenzen

    MB,BS, DRANZCOG 

    Medical Director - SA

    • Bariatric Practitioner, Adelaide Bariatric Centre
    • Past Chairman, Royal College of General Practitioners (and Former Board member overseeing general practice training in South Australia
    • Held a number of positions within the SA Health Commission and conducted medical research at the Women's and Children's Hospital and remains a trustee of one of its research foundations. 
  • Dr Paresh Dawda

    Dr Paresh Dawda

    MBBS, DRCOG, DFRSH, FRCGP, FRACGP 

    Medical Director - ACT

    • Works as a GP and ACT Regional Medical Director at Ochre Health in Canberra
    • Visiting Fellow, School of Population Health, ANU
    • Adjunct Associate Professor, University of Canberra
    • Board Member - Heart Foundation (ACT)
    • Member NSW and ACT Faculty Board RACGP and Member of RACGP Expert Committee on Quality Care.
  • Dr Jonathan Levy

    Dr Jonathan Levy

    MBBS, BSc (Medical Psychology), FRACGP, FARGP 

    Medical Director - VIC 

    • Trained in the UK, background in Emergency. Special interest in education
    • Teacher and mentor with National Home Doctor Service
    • Ongoing role as a Senior Lecturer for the University of Queensland and weekend practical surgical teaching and didactic lecturing. 
  • Dr Rajendra Prakash

    DSM, Dip Sports Med, FRACGP 

    Medical Director - QLD 

    • Medical educator for AMC bridging programme 2006-2014. RACGP examiner since 2006
    • Visiting Medical Officer - Queensland Health. Member - Service Improvement Group for Kilcoy hospital and Woodford correctional health
    • Active role in induction of new deputising GPs, supervision of DGPs , promoting ongoing education, conducting CPD activities, clinical reviews and audits. 

Medical Directors

Our team of Medical Directors offer mentorship and guidance to our Doctors on a state level, holding CPD sessions, reviewing patient reports and sharing their clinical expertise.

Queensland

Dr Beres Wenck MBBS, FRACGP, (HON) FAMA 
Dr Raj Prakash DSM, Dip Sports Med, FRACGP
Dr Manuj Chhabra MBBS, FRACGP
Dr Conor Murphy MBCHB, RACGP
Dr Trevor Beall MBBS
Dr Subrata Aditya MBBS, FRACGP
Dr Vicki Stonehouse MBBS, FRACGP
Dr Oliver Segui MD, FRACGP

New South Wales

Dr Dominic Bannerman MBBS, FRACGP
Dr Natalie Caristo FRACGP MBBS, DCH, DRANZCOG
Dr Stephen Ginsborg MB BCh MAICD

ACT

Dr Paresh Dawda MBBS, DRCOG, DFRSH, FRCCP, FRACGP
Dr Nikolai Manassiev FRCOG, FFSRH, MRCGP, MD, FRACGP

Victoria

Dr Nicholas Demediuk MBBS, Bed, FRACGP, DRANZCOG
Dr Andre Mostert MB.ChB, M.Fam.Med, FRACGP
Dr Mark Cavill MBChB BSc RCGP(UK) RACGP JCCA
Dr Daryl Pye BM. BS, B.Sc (Hons), FRACGP
Dr Jonathan Levy MBBS, BSc, FRACGP, FARGP

South Australia

Dr Bernd Lorenzen BM,BS DRANZCOG
Dr Umberto Russo MBBS, FRACGP
Dr Sprio Dukakis MBBS, FRACGP

Western Australia

Dr Daryl Kroschel MB BS (Hons) GradDipSpMed FAIM FRACGP

Executive management team


  • John Pappalardo

    Chief Executive Officer

  • Brent Cubis

    Brent Cubis

    Chief Financial Officer

  • Andrew Kinkade

    Andrew Kinkade

    Chief Operations Officer

  • Clare Zacka

    Clare Zacka

    Chief Marketing & Retention Officer


  • Bevan Lisle

    External Relations & Communications Director

  • Anthony Buhler

    Anthony Buhler

    Chief Information Officer

State management team

  • Paul Johansen

    Paul Johansen

    General Manager - Queensland


  • Deborah Pescott

    General Manager - Sydney


  • Natalie Rowland

    General Manager - South Australia

  • Byron Nathanson

    Byron Nathanson

    General Manager - Regional NSW

  • Andrew McInerney

    General Manager - Victoria

  • Kellie Lewis

    General Manager - Western Australia

  • Adam Wilson

    International - Adam Wilson

    General Manager - Canada