# LIS Enrollment by Plan, 2006-2026

`medicare_silver.lis_enrollment_plan` · Medicare Advantage, Part D, Medicaid · status live · 102,495 rows

CMS's Low-Income-Subsidy enrollment per Part D plan (contract x PBP) per plan year, with the plan's total enrollment from 2011: the plan's LIS / dual mix. 2026: 5,172 MA-PD plans with 9,424,913 LIS enrollees and 472 PDPs with 4,325,701.

**Grain.** One row per (plan_year, part_d_stream, contract_id, plan_id): one annual snapshot per plan.

| column | type | meaning |
|---|---|---|
| plan_year | int |  |
| part_d_stream | string |  |
| contract_id | string |  |
| plan_id | string |  |
| plan_id_raw | string |  |
| contract_name_raw | string |  |
| plan_name_raw | string |  |
| total_enrolled | int |  |
| total_lower_bound | int |  |
| total_upper_bound | int |  |
| total_suppression_reason_code | string |  |
| lis_enrolled | int |  |
| lis_lower_bound | int |  |
| lis_upper_bound | int |  |
| lis_suppression_reason_code | string |  |
| lis_measure_basis | string |  |
| as_of_date | date |  |
| as_of_date_basis | string |  |
| schema_era | string |  |
| source_member | string |  |
| source_sheet | string |  |
| publisher_row_multiplicity | 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.lis_enrollment_plan WHERE ... LIMIT 100`; read `describe_data_source("medicare_silver.lis_enrollment_plan")` first.