About Us

Gribbles Pathology Malaysia commenced operations in late 1996 and is now the largest private provider of diagnostic laboratory services in the region. Headquartered in Petaling Jaya, we employ over 1,200 staff nationwide and have an established network of more than 60 electronically-linked pathology facilities throughout Peninsular Malaysia, Sabah and Sarawak.

Currently Gribbles Malaysia performs over 4 million patient episodes per year. We provide medical testing in all disciplines to over 10,000 Medical Practitioners, Hospitals and Corporate Clients.

Management Team

Gribbles Pathology is led by a highly experienced management team within the medical diagnostics industry.

Dr Christopher Ting

Group Chief Executive Officer

Dr Christopher worked as a clinician in Australia before becoming the CEO of Quest Laboratories and Innovative Diagnostics in Singapore. He is the founder of Quantum Diagnostics and is a key participant in Malaysia's National Key Economic Areas (NKEA) for Healthcare.

Dr Nelson Nheu

Chief Executive Officer

Dr Nelson Nheu has more than 6 years of clinical experience in the Australian private and public healthcare (mainly in ER & ICU), 6 years of managerial experience in healthcare (running labs and medical app companies) and over 10 years of investment and managerial experience in various other industries. He is passionate about quality and best practices in healthcare, particularly in the digitalization of an otherwise traditional industry.

Dr Joshua M Daniel


Chief Pathologist, Laboratory & Medical Director

Dr. Joshua M Daniel is a consultant anatomical pathologist with more than 34 years of experience. He is an International Fellow of the College of American Pathologist and Member of the International Academy of Cytology. On obtaining his Master of Pathology from the University of Malaya, he completed an advance histopathology training in Hammersmith hospital, London. He then completed 2 fellowships in Australia: Fellowship in Cytology (FNAC) at the Western Australia Centre for Pathology & Medical Research, Perth and at Flinders Medical Centre and a fellowship in Anatomic Pathology at the Western Australia Centre for Pathology & Medical Research & QE II Hospital, Perth. His past positions include Consultant Pathologist Subang Jaya Medical Centre, Malaysia, Clinical Associate Professor Melaka Manipal Medical College, Sessional lecturer at the school of Medicine, Monash University Sunway campus and Senior Consultant/State Pathologist & Head of Dept. Malacca Hospital. Malaysia. Dr. Daniel is also a Technical Assessor for histopathology and cytopathology (ISO 15189) for Standards Malaysia. His areas of special interest include Cytology (Gynae & FNAC), Gastrointestinal and Genitourinary Pathology.

Choo Kok Ming

Chief Operating Officer

Mr Kok Ming is the Chief Operating Officer for Gribbles Pathology and Quantum Diagnostics. Prior to this role, he was the Chief of Staff to the Group Chief Executive Officer of Pathology Asia Holdings. He used to serve as the Director of Customer Experience responsible for allied healthcare services at Timberland Medical Centre in Kuching, Sarawak. His other experiences includes a role as a Strategy Analyst at Accenture.

Dr Izzhar Putra bin Amirudin

Commercial Director

Dr. Izzhar is a medical doctor with over 5 years of commercial management experience across various healthcare companies. He currently oversees all Sales & Marketing activities for Gribbles Pathology and Quantum Diagnostics. Prior to this, he was a marketing manager at Malaysia’s largest generic pharmaceutical firm, Duopharma. He was medically trained in the United Kingdom and recently completed a Masters of Business Administration at Singapore Management University.

Clinical Consultants

Gribbles Pathology has the largest team of clinical consultants and pathologists to provide expert clinical advice in the private pathology market.

Datin Dr Kalavathy Ramachandram

MBBS, M. Path (UM), AM

Consultant Anatomical Pathologist

  • More than 25 years of experience in Pathology, particularly in areas of Lymphoproliferative Disorders, Breast and Lung Pathology

  • Subspeciality Training in Lympho Proliferative Disorders, Freemantle Hospital & QE II Hospital, Perth, Australia

  • Active member of several Medical Association such as Malaysia Medical Association, International Academy of Pathology (Malaysia), Academy of Medicine of Malaysia and The Royal College of Pathologists of Australia

  • Speciality/Subspeciality Education Subcommittee Member for Anatomical Pathology, Malaysian Medical Council since 2020

  • Honorary Lecturer & Co-Researcher for UIAM and KKM; as well as Coordinator of Master of Pathology Training, KKM

Dr Sabariah binti Abdul Rahman

MBBS (UM), M. Path (UM)

Consultant Anatomical Pathologist

  • 40 years of diagnostic pathology in various universities in Malaysia/Ministry of Health (eg Hospital Kuala Lumpur)

  • Before joining Gribbles Pathology was Professor of Pathology in UiTM, Sg Buloh campus

  • General diagnostic (anatomic pathology & cytology)

  • Special interests in oncopathology of colorectal, prostate, lymphomas, breast and gynaecology and application of immunohistochemistry in diagnostics

Dr Siva Das a/l M Thuraisingam

MBBS, M. Path (UKM)

Consultant Anatomical Pathologist

  • 25 years of experience with area of interest in Gastro-intestinal pathology

  • Graduate with Masters of Medical Pathology (Histopathology) from Universiti Kebangsaan Malaysia

  • Active member of Academy of Medicine Malaysia; International Academy of Pathology (IAP), Malaysia Division and Malaysian Medical Association

Dr Manoharan Madhavan

MBBS, MD (Pathology)

Consultant Anatomical Pathologist

  • 31 years of experience in surgical pathology; with special interest in gastrointestinal pathology, female genital pathology, tropical pathology and neuropathology

  • Trained and earned Masters Degree in Pathology from JIPMER, one of the prestigious post graduate medical institutions run by the central government of India

  • Worked as a Professor of Pathology in various academic institutions for 23 years

  • Active member of International Academy of Cytology

Prof. Madya Dr Maizaton Atmadini binti Abdullah

MBBS (Malaya), MPath (UKM), PhD (Birmingham), AM (Malaysia)

Consultant Anatomical Pathologist

  • 17 years of experience in Pathology; with special interests in Lymphoreticular pathology, Oncopathology, Breast pathology

  • Trained and graduated with Masters of Pathology (Anatomic Pathology), UKM

  • Before joining Gribbles Pathology, worked as Histopathologist for Hospital Kuala Lumpur and Senior Consultant Pathologist for Universiti Putra Malaysia

  • Active member of International Academy of Pathologists Malaysian Division, College of Pathologists and Academy of Medicine

Dr Patricia Ann Chandran

MD (USM), M. Path (UM)

Consultant Anatomical Pathologist

  • 15 years of working experience in pathology with special interests in lymphoproliferative diseases, neuropathology and dermatopathology

  • Graduated with Masters of Pathology ( MPath) from University Malaya

  • Before joining Gribbles Pathology was Histopathologist for Hospital Raja Permaisuri Bainun and Consultant Histopathologist at Universiti Malaya Medical Centre

Dr Thanikachalam Pasupati Meenakshi

MBBS, DCP, MD (Path)

Consultant Anatomical Pathologist

  • Over 30 years of experience in Histopathology/cytology: with special interests in Digital Pathology reporting: Breast, Gynaecology , Gastro-intestinal and Uropathology

  • Did his Fellowship attachment in SGH, SingaporeActive member of IAPMD (International Association of Pathology) & SMDC (Seychelles Medical and Dental Council)

  • Before joining Gribbles Pathology, worked as Consultant Pathologist and In charge of Pathology services, Ministry Of Health, Seychelles.

  • Also worked as Associate Prof and HOD of Pathology Department in IMU

Dr Frhana Binti Rahmat

M.D (UNIMAS), M.Path (UPM)

Consultant Anatomical Pathologist

  • 5 years of experience in pathology.

  • Active member of National Specialist registry

  • Apart from working with Gribbles Pathology, also working as a Medical Lecturer in UPNM

Datin Dr Ganeswarie Rajasekaram

MBBS, M. Path (UM)

Consultant Microbiologist

  • She has served as Clinical Microbiologist and Head of Infection Control in Hospital Sultanah Aminah, and state of Johor for 20 years.

  • Contributed to development of guidelines for Tuberculosis and Infection Control at the National level.

  • She has a subspecialty in Mycobacteriology and keen interest in Molecular biology and antibiotic resistance having held key position in Antibiotic Stewardship programs at the hospital level.

  • Currently hold the position of Associate Professor of Medical Microbiology in Monash University, Malaysia.

  • Has more than 40 publications at National and International peer reviewed Scientific journals.

Dr Thuhairah Hasrah Abdul Rahman

MBCHB, M. Path (UM)

Consultant Chemical Pathologist

  • Serves as a Visiting Consultant Chemical Pathologist at Gribbles Pathology and is a Consultant Chemical Pathologist at the Clinical Diagnostics Laboratory, Hospital Universiti Teknologi MARA.

  • Has had over 10 years’ experience in Chemical Pathology and has served the laboratory as a Quality Manager between 2012 and 2019.

  • Also a Technical Assessor of the MS ISO 15189 accreditation for STANDARDS Malaysia and is a member of the Laboratory Accreditation Evaluation Panel (LAEP) for STANDARDS.

  • Has an extensive research portfolio and currently collaborates with Gribbles Pathology to carry out research in laboratory quality assurance.

Prof. Datuk Dr Ainoon binti Othman

PJN MBBS (UM), DCP (Lon), DrMedSc (UKM), AM (Mal), FAMM, FRCP (Edin)

Consultant Haematologist

  • Medical Professor and Consultant Haematopathologist in Faculty of Medicine and Health Sciences at Universiti Sains Islam Malaysia (USIM)

  • Visiting Professor and Consultant Haematologist in UKM Medical Center

  • Sub-specialised in molecular diagnostics with special interests in G6PD and thalassaemia

  • Presently the Vice President of College of Pathologist, Academy of Malaysia and has served as a council member since 2008. Also a member of editorial board of Malaysian Journal of Pathology

  • Technical assessor for MS ISO15189

Datin Dr G Duraisamy

KMN, JSM, MBBS (Spore), DCP (Lon), D. Path (England), RRCPA (Aust), AM (Mal), FRCP (Edin), FAMM

Consultant Haematologist

  • Experienced in the haematology field and have lectured the subject in many institutions such as Universiti Putra Malaysia, Universiti Malaya, Universiti Kebangsaan Malaysia, Monash University (in Malaysia) & WHO

  • Research interests include anaemia, haemophilia and congenital blood disorders, thrombophilia and hepatitis B & C

  • Had held several prominent positions in her career such as former President of the Haemophilia Society of Malaysia, EXCO member of the World Federation of Haemophilia and Chairman of the AIDS action committee of MMA

  • Active in community service and was the Chairman Board of Governors Senior Methodist Girls’ School, KL

  • Former Member of the Board of Trustees, Centennial Scholarship Fund

Prof. Madya Dr Leong Chooi Fun

MD (USM), FRCPA (Aus), M. Path (UKM)

Consultant Haematologist