CHPW Interoperability Developer Portal - Washington State Local Health Insurance - CHPW

CHPW Interoperability Developer Portal

CHPW Interoperability Developer Portal

This website gives instructions for application (“app”) developers to learn how to connect to and use the Patient Access API and Provider Directory API.


To comply with CMS Interoperability requirements, we’re showing app developers how to access the Patient Access API and Provider Directory API.

Terms of Service

Agreement to our Terms of Service is required to access and use Interoperability APIs. Our terms of service are compliant with data blocking and other CMS rules about access.

Please read our Terms of Service ➜

CHPW’s Patient Access API

Register your app and find technical documentation using the links below.

CHPW’s Provider Directory API

You don’t need to register to use the Provider Directory API.


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