Sources

This register points to the public sources used by the guide. The links are cross-references and program or route documentation; the licensed 005010X279A1 implementation guide remains the normative source for complete grammar and situational requirements.

X12 standards and public interpretations

Source	Use in this guide
X12-X279-PRODUCT	Identifies the licensed 270/271 X279 product and where to obtain it.
X12-EXAMPLES-005010X279	Public 270/271 interchange, hierarchy, subscriber/dependent, and AAA examples.
X12-RFI-1498	Interpretation of trailing delimiters and named 999 errors for the case described.
X12-RFI-1585	Supports multiple interchanges in one physical file and separate acknowledgment scope.
X12-RFI-2821	Explains EB and AAA use in the case described by the RFI.
X12-RFI-2628	Explains MSG use in the case described by the RFI.

Segment and transaction cross-references

Source	Use in this guide
STEDI-271-GUIDE	Public cross-reference for 271 segments, elements, loops, and example shapes.
STEDI-ISA and STEDI-IEA	Public field references for the interchange header and trailer.
STEDI-GS and STEDI-GE	Public field references for functional-group headers, trailers, and counts.
STEDI-ST and STEDI-SE	Public field references for transaction-set headers, trailers, and counts.
STEDI-BHT, STEDI-HL, and STEDI-NM1	Public cross-references for transaction context, hierarchy, and party names.
STEDI-EB	Public field reference for qualified eligibility and benefit statements.
STEDI-DTP	Public field reference for date or date-period context.
STEDI-MSG	Public field reference for message text; X12 RFI 2628 addresses one specific use.

CMS program context

Source	Use in this guide
CMS-ELIGIBILITY	Program-level description of the HIPAA 270/271 transaction.
CMS-MSP	Program-level Medicare Secondary Payer and coordination concepts.
CMS-MA	Program-level Medicare Advantage context.
CMS-HETS-GUIDE	CMS HETS-specific operational and trading-partner requirements.
CMS-HETS-EXAMPLE	A CMS-authored illustrative HETS 271 response and its exercised segment families.

Route and profile documents

Source	Use in this guide
UHC-270271	UnitedHealthcare’s instructions for the products and routes named in the guide.
UHC-EDI	UnitedHealthcare EDI entry point and connectivity methods.
STEDI-SEND	Stedi submission modes and test-data or enrollment warnings.
STEDI-RAW	Stedi’s contract for its raw-X12 endpoint.

Route-owner material applies to its named route. None of these public pages replaces the licensed TR3 or proves universal payer behavior.