Community Health Data Harmonization.
How harmonizing community health worker (CHW) data can drive quality improvement and cross-site learning.

Making the case for Community Health Worker Master Lists
CHWs have been a cornerstone of primary health delivery across the globe for more than a century.
They deliver a range of promotive, preventative, diagnostic, and treatment services in areas as diverse as malaria treatment, to HIV management, to the surveillance of and response to disease threats, such as Ebola and COVID-19.
The World Health Organization (WHO) recognizes CHWs as being integral to primary health care and important contributors to health for all. CHWs are also well-placed to address the current 43 million health worker shortage.
But unfortunately, many nations don’t know how many CHWs they have, how to contact the ones they do, or even where those workers are located.
This lack of data hampers the ability of governments to engage in strategic health planning and workforce coordination. It also means CHWs often miss out on the crucial support and resources they need to do their job effectively.
CHWs work, but to provide robust, high-quality care to patients, they must be salaried, skilled, supervised, and supplied. And they must be a recognised and valued part of a strong health system.
So, the first step in making professional CHWs (proCHWs) the norm is to #CountCHWs.
Since we published the first #CountCHWs guidance, data has improved markedly. But there is still work to do. The 2024 estimate of 4.7 million CHWs was reported by 100 countries, and whilst 71% of reported data is from 2019-2023, it still means we are lacking accurate and up to date figures from almost 30% of countries.
Information deficits include official CHW counts, records of CHWs’ active and accreditation status and competencies, location of service, and availability of essential supplies.
This lack of information has frustrated efforts to procure and distribute the correct amount of personal protective equipment (PPE) for CHWs, and hampered efforts by governments to leverage these essential health workers during the COVID-19 pandemic.
The often limited availability of CHW information stunts the ability to provide robust, accessible care. It also impedes health system planning, health workforce management, and evidence-based decision-making.
A National Georeferenced CHW Master List (CHWML) is a single source of truth.
It contains the data elements required to uniquely identify, effectively describe, enumerate, locate, and contact all CHWs in a country.
The CHWML is critical for strategic planning, training, deployment, payment, supply, supervision, and monitoring and evaluation of CHWs in the context of broader human resources for health and primary health care systems.
Establishing and reinforcing the use of a CHWML can serve many needs, like:
But, establishing a CHW master registry is only the first step. The registry also has to be georeferenced – meaning the locations of the CHWs across the country would be carefully mapped out. By providing insight into the number, spatial distribution, socio-demographics, and training of CHWs across different parts of the country, a CHWML hosted in an appropriate registry is fundamental to maximizing the impact, efficiency, and equity of health service delivery. And for achieving health for all.
See Table 1 for a more detailed explanation of use cases for a CHWML.
The CHWML Implementation Support Guide
To assist governments and their technical and financial partners with a roadmap for generating, sharing, and maintaining a national, up-to-date, and georeferenced list of CHWs, several organizations leading the #CountCHWs campaign (Clinton Health Access Initiative, Community Health Impact Coalition, Health GeoLab, Living Goods, The Global Fund, and UNICEF) have developed an Implementation Support Guide for governments committed to establishing a CHW registry.
The guide includes an overview of the characteristics of a functional and institutionalized CHW, followed by a seven-step process of establishing, sharing, and maintaining a CHWML in a registry.

Characteristics of a Functional and Institutionalized CHWML
1. Current State Assessment
Understand the current people, processes, and technology involved in tracking and maintaining data on CHWs. Identify improvement opportunities.
2. Governance structure
Define leadership, institutional home, roles, and responsibilities over the CHW master list and registry.
3. Target State Definition
Partner with stakeholders to identify functional and technical requirements, as well as associated SOPs for a CHW master list and registry.
4. Master List Generation
Merge existing list (as relevant) into a master list to be shared across entities and conduct additional data collection as relevant to fill gaps.
5. Establishing a CHW Registry
Undertake technical setup of a registry to host CHW master list and its associated hierarchies and geospatial data train stakeholders.
6. Sharing the CHW Master List
Develop a data sharing policy, identify data sharing mechanisms, and support a culture of data use.
7. Maintaining the CHW Master List and registry
Document SOPs for updating the CHW master list and maintaining the registry. Secure resources for sustainability.
CHWML maturity continuum
Establishing a functional and institutionalized CHWML is an iterative process. The figure below illustrates how the progress of a CHWML can be measured qualitatively against four high-level domains (Use, Master List, Registry, and Supporting Environment). The continuum suggests what actions may be taken to increase CHWML effectiveness and robustness.
How the CHWMLs are being used
To illustrate the real-world outcomes from implementing a CHWML, we’ve included an overview of experiences in Sierra Leone and Uganda

CHWs are vital to achieving health for all. But to do their essential work – CHWs must be treated like the professionals they are.
When CHWs are salaried, skilled, supervised, and supplied, everyone benefits. However, this is only possible when countries know how many CHWs they have, how to contact them, and where their CHWs are located.
In short, to make CHWs count, we have to count CHWs.
Watch the official launch of #CountCHWs, where a panel of key campaign partners, government officials, and a CHW discuss their views and experiences with a CHWML and the Implementation support guide.
resource library

How harmonizing community health worker (CHW) data can drive quality improvement and cross-site learning.

How six innovative partners joined forces to accelerate the adoption of high-impact community health systems design.

The role of community health workers (CHWs) in improving health equity and coverage.