Healthcare · EDI & Standards
EDI X12 File Processing
Overview
Created parsing and ingestion pipelines for the X12 EDI transaction sets that move data between US payers, employers, and providers: 834 (benefit enrollment and maintenance), 820 (premium payments), 837 (professional, institutional, and dental claims), along with related transactions such as 835 remittance advice.
EDI files are hierarchical loop/segment structures (ISA/GS envelopes, ST transactions, and nested loops like 2000A–2300) rather than flat records, so the parsers handled envelope validation, loop traversal, repeating segments, and situational elements before flattening transactions into normalized relational tables. Malformed files, unexpected segment ordering, and partner-specific companion-guide quirks were handled through validation layers that quarantined bad transactions instead of failing whole batches.
Beyond EDI, the same ingestion framework standardized data arriving as XML, HL7, Parquet, CSV, JSON, and Excel — giving downstream analytics one consistent schema regardless of the source format a client or trading partner used.
Technical Implementation
Envelope Validation
Validate ISA/IEA and GS/GE envelopes, control numbers, and ST/SE transaction counts before parsing. Files failing structural validation are quarantined with actionable error reports for trading partners.
Loop & Segment Parsing
Traverse the hierarchical loop structure of each transaction set — subscriber and dependent loops in 834, claim/service-line loops (2300/2400) in 837 — resolving situational segments and repeating elements per implementation guide.
Normalization to Tables
Flatten parsed transactions into normalized member, coverage, claim, and payment tables with full lineage back to the source file, interchange, and segment position for auditability.
Partner-Specific Handling
Companion-guide variations per payer and trading partner are captured as configuration rather than code branches, so onboarding a new partner doesn't destabilize existing feeds.