Cause of death
From certificates to trusted mortality intelligence — a digital end-to-end, interoperable infrastructure that supports medical certification, ICD-11 coding, automated underlying-cause selection, quality assurance, and routine analysis, so countries produce comparable, timely mortality data for policy and action.
Mortality statistics are widely used for medical research, monitoring of public health, evaluating health interventions, and planning and follow-up of health care. Rules adopted by the World Health Assembly regarding the selection of a single cause from death certificates for routine tabulation are provided to standardize the production of mortality data.
Implementation of the ICD for mortality requires more than software: it requires civil registration, recording, reporting, information flows, quality assurance and feedback, and training for users working with the input or output of data. It was agreed by the Sixth Decennial International Revision Conference in 1948 that the cause of death for primary tabulation should be designated the underlying cause of death.
Capture → Code → Select → Analyse → Improve
A single, coherent flow. Each component is transparent, reproducible, and interoperable — so outputs can be explained to ministries, statisticians, implementers, and clinicians.
Certification
Medical certification of cause of death (eMCCD) and structured verbal autopsy for deaths outside facilities.
ICD-11 coding
Convert text to standardized ICD-11 codes — multilingual, smart search, postcoordination where relevant.
UCOD with DORIS
Apply ICD mortality rules transparently and reproducibly to select the underlying cause of death.
Quality & trends
ANACoD identifies ill-defined causes, unusual patterns, and data quality gaps for routine improvement.
Digital public goods for mortality
Practical components that implement standards and rules. Countries can adopt parts and scale progressively, while keeping interoperability through shared specifications.
ICD-11 coding & classification
ICD-11 coding tool & browser
Multilingual smart coding that retains clinical detail (including postcoordination where relevant), enabling consistent downstream processing.
- Standardized ICD-11 output for interoperability
- Supports multilingual medical certification
- Designed for consistent coding and analysis
Underlying cause of death selection
DORIS — automated UCOD selection
The WHO Digital Open Rule Integrated cause of death Selection tool applies ICD mortality rules transparently and reproducibly. The detailed steps are exposed so users can explain how the selection was made. Available online and offline.
- Rule-based, explainable outputs
- Reproducible across datasets and time
- Supports training and trust-building
Data quality analysis
ANACoD-3 — routine mortality data analysis
Comprehensive and systematic analysis of mortality and cause-of-death data. ANACoD-3 analyses sub-national data to inform of potential health-equity issues or outbreak patterns and assesses plausibility of results. Supports ICD-10 and ICD-11, multiple languages, and multi-period trend analysis.
- Estimates completeness of death reporting
- Comparable mortality indicators and trends
- Flags ill-defined causes and inconsistencies
Coding quality assessment
CoDEdit — assess and improve coding quality
Software that helps producers of cause-of-death statistics strengthen their capacity to perform routine plausibility checks on their coding. Supports both ICD-10 and ICD-11 coded data.
- Quality assessment and feedback for coders
- Supports capacity building and training
Medical certification
The principle of a cause of death and an underlying cause of death can be applied uniformly by using the medical certification form recommended by the World Health Assembly. It is the responsibility of the medical practitioner signing the death certificate to indicate which morbid conditions led directly to death and to state any antecedent conditions giving rise to the underlying cause of death.
Nationally, this “form of medical certificate of cause of death” is frequently incorporated into a form that includes other information required by national registration. It is sometimes referred to as medical certificate, cause of death certificate, or simply death certificate. The current international form was updated in 2016, after more than 50 years — changes are infrequent because they require updates to national legislation and information systems.
International form of MCCD
International mortality coding instructions presuppose that data have been collected with a death certificate conforming to the international form of Medical Certificate of Cause of Death as recommended by WHO.
ICD-11 reference guide
Contains information about the design, context and use of ICD. For mortality, specific sections cover filling in the certificate, coding the recorded information, selecting the underlying cause of death, and standards for national and international reporting.
Cause of death flyer
A quick reference for certifying physicians on how to fill in the medical certificate of cause of death, including a step-by-step approach and frequently used ill-defined terms.
External inspection of a body and certification
WHO recommendations and learning resources support accurate examination of the deceased and medical certification practices, strengthening the quality of input data before the first code is assigned.
WHO recommendations
WHO Recommendations for conducting an external inspection of a body and filling in the Medical Certificate of Cause of Death (MCCD).
Training slides
Training slides accompanying the WHO Recommendations for conducting an external inspection of a body.
Verbal autopsy
Verbal autopsy has become an important source of information about causes of death in populations lacking medical certification. It is an interview carried out with family members or caregivers of the deceased, using a structured questionnaire to elicit signs, symptoms and other pertinent information that can later be used to assign a probable underlying cause of death.
The WHO 2022 verbal autopsy instrument provides standardized data capture aligned with ICD-11, enabling consistent processing and analysis alongside facility-based mortality data.
Systems
eMCCD specifications
The electronic Medical Certificate of Cause of Death is the basis for collecting cause-of-death information digitally. The form is designed to collect all aspects relevant to assigning the cause of death. In addition to the paper template, technical specifications for a digital form are published — standardizing input in line with the international form, with a data dictionary for field names and content-encoding that allows processing by the coding API and software for selecting the single underlying cause of death.
Training modules
ICD-11 Training Package
The ICD-11 e-learning tool is designed to build and enhance ICD-11 coding competency among the health coding workforce and other producers of ICD-coded data. Includes a dedicated module on death certification.
WHO Interactive self-learning tool
Designed for self-learning and classroom use, with a modular structure that permits tailoring. Two mortality-related modules: certification self-learning, and recommendations for conducting an external inspection of a body.
WHO Academy courses
WHO Academy courses on ICD-11 coding and medical certification of cause of death — for the coding workforce, users of coded data, implementers, and decision-makers. Available in UN languages with accredited, verifiable credentials.
Proposals, rules, value sets, and testing
Standards and rules are maintained openly. Participation is evidence-based: contributors propose improvements, test cases, and help maintain shared value sets and mappings. Outputs remain explainable and auditable over time.
Key platforms
- Proposal platform — propose updates to classification, rules, and guidance
- Rule editing platform — maintain and refine selection logic
- Value set platform — shared ICD-11 groupings (e.g. tabulation lists)
- Rule testing platform (e.g. MIROR) — validate changes transparently
- Download platform — access digital public goods
Participation principles
- Evidence-based proposals with rationale and references
- Transparent review and reproducible outcomes
- Shared maintenance for sustainability
What countries need to plan for
Digitization succeeds when governance, integration, and capacity building are planned alongside tooling. WHO provides specifications and digital public goods; countries implement in different ways while shared standards keep data interoperable.
Beyond tools
- Governance — roles, processes, accountability
- Capacity building — certification and coding training
- Integration — linkage to health information systems
Enable scale
- Sustainability — maintenance, budgets, local ownership
- Privacy & security — confidence in handling mortality data
- Transparency — auditable steps; reproducibility over time
Selected events
Latest from WHO
Key facts
Connected WHO resources
WHO data collection & analysis tools
Catalogue of WHO instruments for data collection, harmonization, and analysis across health domains.
WHO Mortality Database
National data on registered deaths by underlying cause, age, sex, and year, submitted by Member States.
World health statistics
Annual compilation of health statistics for Member States, the most comprehensive WHO statistical product.
WHO-FIC mortality forum
Discussion forum within the WHO Family of International Classifications Network for mortality coding and rule questions.
Civil registration and vital statistics (CRVS)
WHO support for the civil registration systems that underpin mortality reporting.
ICD-SMoL — Short Mortality List
Short list for initial collection of causes of death in low-resource settings.
Foundational documents
- WHO Nomenclature Regulations, 1967
- Report of the International Conference for the 6th Decennial Revision
- Medical certification of cause of death, 1979
- Manual of the International Statistical Classification of Diseases, Injuries and Causes of Death
External resources
Outcome: comparable, timely mortality intelligence for policy and action — supported by standards, rules, tools, and open collaboration. WHO provides specifications and digital public goods; countries can implement in different ways, but shared standards keep data interoperable and workflows reproducible.