# States K4 Participation / certification tracker: marketplace_state_participation_event_v1

`medicare_silver.marketplace_state_participation_event_v1` · Insurer negotiated rates · status partial · 2,740 rows

Marketplace product K4 (Participation / certification tracker) of the States lane: issuer entries, exits and county footprint changes in each state's Marketplace. One row per state x plan year x issuer event (event: enter, exit, expand, reduce); counties_raw as printed. evidence_kind says whether the event was announced or inferred by comparing two documents. 51 state(s): AK AL AR AZ CA CO CT DC DE FL GA HI IA ID IL IN KS KY LA MA MD ME MI MN MO MS MT NC ND NE NH NJ NM NV NY OH OK OR PA RI SC SD TN TX UT VA VT WA WI WV WY.

**Grain.** Issuer entries, exits and county footprint changes in each state's Marketplace. 2,740 rows (Athena, 2026-10-29). Period 2011 to 2027 (plan_year_int).

| column | type | meaning |
|---|---|---|
| state_code | string |  |
| plan_year | string |  |
| market | string |  |
| issuer_name_raw | string |  |
| hios_issuer_id | string |  |
| event | string |  |
| counties_raw | string |  |
| effective_date | string |  |
| announced_date | string |  |
| document_url | string |  |
| document_sha256 | string |  |
| locator | string |  |
| issuer_id | string |  |
| issuer_id_type | string |  |
| evidence_kind | string |  |
| compared_document_sha256 | string |  |
| on_exchange | string |  |
| plan_year_int | int |  |
| segment | string |  |
| effective_date_d | date |  |
| announced_date_d | date |  |
| on_exchange_bool | boolean |  |
| contract_issues | string |  |
| source_file | string |  |
| source_file_git_blob | string |  |
| source_row_number | int |  |
| row_key | string |  |

Query it: `query_substrate` with `SELECT ... FROM medicare_silver.marketplace_state_participation_event_v1 WHERE ... LIMIT 100`; read `describe_data_source("medicare_silver.marketplace_state_participation_event_v1")` first.