# SNP HEDIS service area (plan x county), 2019-2025

`medicare_silver.snp_hedis_service_area` · Medicare Advantage, Part D, Medicaid · status live · 124,273 rows

The counties each SNP plan served in the HEDIS year, with SSA and ANSI (FIPS) county codes and the employer-only flag. 2025: 31,292 rows.

**Grain.** One row per (contract_id, plan_id, ssa_code, ansi_code, report_year).

| column | type | meaning |
|---|---|---|
| contract_id | string |  |
| plan_id | string |  |
| ssa_code | string |  |
| ansi_code | string |  |
| state_code | string |  |
| county_name_raw | string |  |
| eghp_only | string |  |
| report_year | int |  |
| observed_period | date |  |
| asserted_at | date |  |
| effective_period_start | date |  |
| effective_period_end | date |  |
| cms_vintage_sequence | int |  |
| parse_revision | int |  |
| parser_artifact_hash | string |  |
| source_url | string |  |
| sha256_content_hash | string |  |

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