# LIS Contract Enrollment by County, 2009-2026

`medicare_silver.lis_contract_county` · Medicare Advantage, Part D, Medicaid · status live · 1,927,349 rows

The Low-Income-Subsidy enrollees of every Part D contract in every county, MA-PD and PDP separately, one snapshot per plan year: where the dual / LIS members sit by carrier and county. 2026: 96,628 MA-PD and 24,833 PDP contract-county rows.

**Grain.** One row per (plan_year, part_d_stream, contract_id, state_fips, county_fips).

| column | type | meaning |
|---|---|---|
| plan_year | int |  |
| part_d_stream | string |  |
| contract_id | string |  |
| state_fips | string |  |
| county_fips | string |  |
| fips5 | string |  |
| state_code_raw | string |  |
| county_code_raw | string |  |
| state_name_raw | string |  |
| county_name_raw | string |  |
| contract_name_raw | string |  |
| lis_enrolled | int |  |
| lis_lower_bound | int |  |
| lis_upper_bound | int |  |
| lis_suppression_reason_code | string |  |
| as_of_date | date |  |
| as_of_date_basis | string |  |
| schema_era | string |  |
| source_member | string |  |
| source_sheet | string |  |
| 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.lis_contract_county WHERE ... LIMIT 100`; read `describe_data_source("medicare_silver.lis_contract_county")` first.