HCPCS Level II code B9998 denotes a notice/non-covered entry related to enteral nutrition supplies. This code is used to identify items or supply transactions tied to enteral feeding where coverage may not apply or where a notice of coverage status is recorded. Nationally, clear identification of non-covered enteral supplies matters for billing transparency, patient communications, and claims adjudication across payer types.

Key payers in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code's clinical and billing context, what service and site of service it represents, and which major payers are relevant for coverage considerations. The publication summarizes typical use cases for enteral supply coding, common billing modifiers associated with these supply/service lines (listed separately), and notes where input data is not available.

The article provides benchmarks and policy context where available, outlines typical payer coverage patterns for enteral supplies, and highlights operational implications for provider billing workflows and claims processing. Data not available in the input will be explicitly noted.