EDI Fundamentals
The building blocks of X12 EDI — envelope structure, trading partner agreements, version strings, and what the implementation guides actually say.
What is X12 837P? Complete Format and Field Guide
A complete guide to the X12 837P professional claim format — segments, loops, fields, and how to generate and test 837P transactions for EDI go-live projects.
EDI 835 Remittance Advice: Complete Guide for Healthcare IT
Everything you need to know about the X12 835 electronic remittance advice — structure, key segments, CARCs, reconciliation logic, and testing.
What is the ISA Segment in X12 EDI? A Complete Reference
The ISA segment is the interchange header for every X12 EDI file. Learn what every element means, common mistakes, and how to configure it per payer.
HIPAA 5010 Transaction Sets: Complete List and Reference
Every HIPAA 5010 transaction set explained — 837, 835, 834, 270/271, 276/277, 278, 820, 999 — with implementation guide versions and use cases.
EDI 999 vs 997: What's the Difference and Why It Matters
The 997 and 999 are both functional acknowledgments, but they're not interchangeable. Learn the difference, when each is used, and how to test acknowledgment flows.
X12 GS and ST Segments Explained: Functional Group and Transaction Headers
The GS and ST segments explained — what every element means, how they relate to ISA, and common configuration mistakes that cause 999 rejections.
What Is a Trading Partner Agreement and How Does It Affect EDI Testing
A trading partner agreement defines the technical parameters of every EDI transaction you exchange with a payer. Here is what it contains and what breaks when it is wrong.
X12 EDI Envelope Structure: ISA, GS, and ST Explained for Healthcare Testers
Every X12 EDI file has the same three-layer envelope — ISA, GS, and ST. Here is what each layer controls and what breaks when it is wrong.
How to Generate Synthetic X12 837 Test Data for EDI Go-Live Testing
A practical guide to building synthetic 837P test data that is structurally valid, clinically coherent, and safe to use in any test environment.