Cross-Domain Healthcare Claims Event Processing Using AWS’s New Feature: Lambda & DynamoDB Cross-Account Integration

AWS has introduced a new AWS Lambda capability that enables native cross-account integration with DynamoDB Streams, allowing a DynamoDB table in one AWS account to directly trigger Lambda functions in another account.

Read more here:
https://aws.amazon.com/about-aws/whats-new/2026/01/aws-lambda-cross-account-access-dynamodb-streams/

Applying AWS Cross-Account New Feature to Healthcare Claims Events Processing Business Processes

Healthcare payer claims processing companies organization their IT into multiple business units based on business domains, each owned by a separate business unit leader. These domains operate independently and are typically deployed in separate AWS accounts, requiring cross-domain event propagation without violating ownership boundaries.

Claims events are consumed across four core domains:

• the Claims domain creates and updates claims,

• Eligibility validates coverage,

• Pricing applies contractual rates, and

• Payments executes settlement

Each domain owns its data, logic, and AWS account.

When a claim is created, downstream teams responsible for eligibility validation and pricing recalculation must react immediately. In most healthcare payer organizations, these teams operate in separate AWS accounts, aligned to different business units.

With this new AWS cross-domain capability, a claim creation event written in the Claims domain can directly trigger processing in the Eligibility and Pricing domains across AWS accounts without copying claims data or introducing new integration platforms.

Next post: a hands-on walkthrough showing how to implement this using DynamoDB Streams and cross-account AWS Lambda triggers.