Healthcare Patient Billing Portal Development

Client profile: Series A digital health startup, 80 employees.

Challenge: The company needed a Healthcare Patient Billing Portal to handle insurance claim submissions, patient responsibility calculations, and automated statement generation. Their existing manual process caused approximately 25% of claims to be rejected on first submission due to coding errors.

Solution: Smartbrain.io deployed a team of 3 C# engineers who designed and built a microservices-based billing platform using ASP.NET Core, Azure SQL Database, and Azure Service Bus. The team implemented EDI 837/835 transaction processing, integrated with clearinghouses via REST APIs, and built a patient payment portal using Blazor WebAssembly. The engagement lasted approximately 14 weeks.

Outcomes: First-pass claim acceptance rate improved by roughly 65%, reducing claim rejections from ~25% to about 9%. Patient payment collection time decreased by an estimated 40% through automated statement delivery. The MVP was delivered in approximately 14 weeks, enabling the client to onboard 5 new enterprise customers within 3 months.

Client profile: Mid-market healthcare financing company, 250 employees.

Challenge: The client's legacy billing engine, built on .NET Framework 4.8, could not scale beyond ~200 transactions per second and lacked support for modern payment methods. They needed to migrate to a modern architecture without disrupting existing operations.

Solution: Smartbrain.io provided 4 C# engineers who executed a strangler fig migration pattern, incrementally replacing legacy components with .NET 8 microservices. The team used Azure API Management for gateway routing, Azure Cosmos DB for document storage, and implemented idempotent payment processing using Azure Durable Functions. The migration was completed in approximately 20 weeks.

Outcomes: System throughput increased by roughly 8x to ~1,600 transactions per second. Payment processing latency dropped by an estimated 70%, from ~3 seconds to under 1 second. The platform now supports roughly 15 payment methods, increasing patient payment convenience scores by about 35%.

Client profile: B2B healthcare SaaS platform, 180 employees.

Challenge: The client's Practice Management software lacked a comprehensive billing module, causing customers to use third-party systems with costly integration fees. Customer churn due to billing limitations was approximately 18% annually.

Solution: Smartbrain.io staffed a team of 5 C# engineers who built a native billing module using Domain-Driven Design principles. The team implemented a rules engine for payer-specific claim logic using C# expression trees, integrated with 12 major insurance payers via REST APIs, and built a denial management workflow using MassTransit and RabbitMQ. The engagement spanned approximately 24 weeks.

Outcomes: Customer churn related to billing dropped by roughly 60%, from ~18% to about 7% annually. The billing module generated approximately $2.1M in new ARR from existing customers upgrading their plans. Time-to-value for new customers decreased by an estimated 50% as billing setup time reduced from ~4 weeks to about 2 weeks.