NABL Accreditation for Diagnostic Laboratories

This node applies to an operating diagnostic or medical testing laboratory acting as a conformity-assessment body (CAB). NABL’s medical-laboratory programme is for laboratory organisations seeking accreditation to ISO 15189 rather than for students or individual laboratory professionals seeking a personal certificate.

To be ready to apply, the laboratory needs a documented management system that describes how it meets the applicable ISO 15189 requirements. The requested scope of accreditation must be completed carefully in the application; where the laboratory considers an ISO requirement wholly or partly inapplicable, NABL expects it to give reasons.

Technical readiness is central: NABL’s medical-laboratory criteria address quality and competence requirements, including governance, resources and laboratory processes. The exact evidence needed depends on the disciplines, examinations and locations included in the laboratory’s proposed scope.

• Operate as a medical/diagnostic testing laboratory seeking organisation-level accreditation.
• Implement and document an ISO 15189-aligned management system before application.
• Define only the examinations, disciplines and locations for which the laboratory can demonstrate competence in its requested scope.
• Use the current NABL 112A specific criteria and NABL 112B guidance alongside the application materials, because NABL updates its controlled documents periodically.

The applicant laboratory submits NABL 153 through the NABL application portal, with its management-system documentation, proposed scope and prescribed application fee. NABL specifically cautions applicants to complete the proposed scope carefully.

NABL’s published accreditation-process document describes a staged process: application and document review, pre-assessment where necessary, initial assessment, corrective action for findings, scrutiny and recommendation, an accreditation decision, and issue of the certificate. Accreditation is therefore not automatic upon filing the application; it follows assessment of the laboratory’s documented and demonstrated competence.

The final certificate identifies the accredited CAB and its scope. A laboratory should advertise or claim accreditation only for the scope actually granted by NABL, not for services outside that scope.

• Use NABL 153 for a medical testing laboratory application.
• Upload the quality-management/system documentation and specify the requested scope.
• Pay the prescribed application fee with the application.
• Prepare for assessment and closure of any nonconformities before the accreditation decision.

This is an accreditation process, not a fixed-length course. NABL’s published process includes document review, assessment, corrective actions and an independent accreditation decision, so the time to grant depends on the laboratory’s readiness, the scope requested, assessment scheduling and the speed and adequacy of corrective-action closure. NABL does not state a single universal turnaround time in the cited public process materials.

For ongoing accreditation, NABL’s General Information Brochure amended on 17 June 2026 refers to a four-year accreditation cycle and a mid-cycle fee at the end of year two. Laboratories should confirm the currently applicable assessment programme, surveillance arrangements and certificate conditions directly with NABL before budgeting or setting launch dates.

• No standard course duration or guaranteed approval timeline is published for all diagnostic laboratories.
• Build lead time for implementation, records, assessment and corrective actions.
• Plan for continuing oversight during the accreditation cycle rather than treating accreditation as a one-time filing.

Fees are variable and should be treated as dated regulatory charges rather than a total project-cost estimate. In NABL 100A as amended 17 June 2026, the listed application fee for a medical laboratory covering all disciplines is ₹6,000 plus ₹200 for each associated sample collection centre/facility. The brochure separately lists category-based application fees for micro, mini, small, medium, large and very large laboratories, based on patient volume and with collection-centre charges where applicable.

For example, the same June 2026 fee schedule lists application fees of ₹10,000 plus ₹200 per associated collection centre for micro laboratories (up to 25 patients/day) and mini laboratories (26–50 patients/day), ₹18,700 plus ₹200 per collection centre for small laboratories (51–100 patients/day), ₹44,000 plus ₹200 per collection centre for medium laboratories (101–400 patients/day), ₹1,10,000 plus ₹200 per collection centre for large laboratories (401–1,000 patients/day), and ₹2,20,000 plus ₹200 per collection centre for very large laboratories (over 1,000 patients/day).

These application charges are not the laboratory’s complete cost of becoming accreditation-ready. The official brochure also provides for recurring accreditation-cycle charges and assessment-related charges; a lab should obtain the current fee schedule and budget separately for ISO 15189 implementation, staff competence, quality control, equipment maintenance/calibration where applicable, proficiency testing or external quality assessment, assessor travel/logistics and corrective actions.

• Use the current NABL 100A fee brochure, not older blog or consultant quotations.
• Classify the lab by the current patient-volume category and count associated collection centres accurately.
• Separate NABL fees from the operational cost of implementing and sustaining the quality system.
• Confirm tax treatment, assessment costs and recurring fees with NABL before committing a business budget.

After grant, the practical next step is to maintain the accredited management system and continue to meet NABL’s accreditation conditions throughout the cycle. This includes preparing for NABL’s ongoing assessment arrangements and paying applicable recurring or mid-cycle charges under the current fee schedule.

A laboratory may later seek changes to its accredited scope as its services expand, but it should first verify the relevant NABL procedure, current fees and assessment implications. For newer or smaller medical testing laboratories that are not yet ready for full ISO 15189 accreditation, NABL also publishes a separate Medical Entry Level Testing Laboratory recognition programme and application/checklist; it is a distinct programme, not the same as full medical-laboratory accreditation.

• Maintain documented competence and quality-system evidence after certification is issued.
• Monitor NABL updates to accreditation conditions, assessment arrangements and fees.
• Consider scope expansion only after verifying the current NABL process.
• Evaluate the separate NABL M(EL)T recognition programme where an entry-level pathway is more appropriate than immediate full accreditation.