Build government systems on the law

Ground AI models in citable law

Power products on rules you don't rebuild

Simulate policy on real rules

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Computable law for all.

Open, machine-readable encodings of the world's rules — starting with tax and benefit policy.

Open infrastructure for encoded law

us-wa/manual/hca/medicaid/400-series-reason-codes/block-1 — 400 Series reason codes · Axiom

400 Series reason codes

400 Series Reason Code Protocols

Go to the reason code chart to link directly to a specific reason code or scroll through the list below.

For ACES Procedures go to ACES Letters in the ACES User Manual.