# Medicare source registry cache

`medicare_source_registry_cache` · Provenance · status live

Postgres mirror of the medicare_silver source-registry Iceberg table — bronze manifest in queryable form for restatement detection + replay.

**Grain.** One row per (source_id, observed_period, s3_object).

Query it: `query_substrate` with `SELECT ... FROM medicare_source_registry_cache WHERE ... LIMIT 100`; read `describe_data_source("medicare_source_registry_cache")` first.