It is a clinical diagnostic laboratory that has been serving the people of Tiruchirapalli since July 1990. It is one of the few clinical diagnostic laboratories in Tiruchirapalli that is personally supervised by a medical doctor who is a specialist in one of the branches of laboratory medicine. The laboratory staff are fully qualified and have a wealth of experience, with half of them having more than 25 years clinical laboratory experience.

The Centre is a member of the Nursing Home Board of the Tamil Nadu State Branch of the Indian Medical Association and adheres to the requirements of statutory bodies and regulatory agencies.

Quality Control is a very key aspect of the work done at Thomas Diagnostic and Research Centre. For clinical biochemistry itself, the Centre is subscribed to the External Quality Assurance Scheme (EQAS) (Department of Clinical Biochemistry, Christian Medical College, Vellore) & also to the External Quality Assurance Program conducted by Erba Mannheim, Germany. In addition to this, quality control checks are performed daily before clinical biochemistry work is started, and quality control checks are performed periodically for clinical haematology.

The Centre is equipped with state-of the art equipment, included a fully-automated random access analyser (auto-analyser) and semi-automated analysers for clinical biochemistry, and automated haematology analysers for clinical haematology work. The Centre performs all routine tests in clinical pathology, biochemistry, haematology, and microbiology. Tests that are not performed here are outsourced.

Research projects are undertaken for college students and others wherever possible.