# Part D plan beneficiary cost sharing, monthly (CMS)

`drug_silver.fact_part_d_plan_cost_share_monthly` · Drugs and formularies · status live · 15,305,647 rows

Per Part D plan, coverage level, tier and days-supply code: the copay or coinsurance at preferred / standard retail and mail-order pharmacies, specialty-tier and deductible flags, every monthly edition 2019-01..2026-09. 2026-09: 172,549 rows.

**Grain.** One row per (release_month, contract_id, plan_id, segment_id, coverage_level, tier, days_supply).

| column | type | meaning |
|---|---|---|
| contract_id | string |  |
| plan_id | string |  |
| segment_id | string |  |
| coverage_level | int |  |
| tier | int |  |
| days_supply | int |  |
| release_month | string |  |
| contract_year | int |  |
| cost_type_pref | int |  |
| cost_amt_pref | double |  |
| cost_min_amt_pref | double |  |
| cost_max_amt_pref | double |  |
| cost_type_nonpref | int |  |
| cost_amt_nonpref | double |  |
| cost_min_amt_nonpref | double |  |
| cost_max_amt_nonpref | double |  |
| cost_type_mail_pref | int |  |
| cost_amt_mail_pref | double |  |
| cost_min_amt_mail_pref | double |  |
| cost_max_amt_mail_pref | double |  |
| cost_type_mail_nonpref | int |  |
| cost_amt_mail_nonpref | double |  |
| cost_min_amt_mail_nonpref | double |  |
| cost_max_amt_mail_nonpref | double |  |
| tier_specialty_yn | boolean |  |
| ded_applies_yn | boolean |  |
| methodology_era | 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 |  |
| source_id | string |  |
| is_current | boolean |  |
| bronze_object_key | string |  |
| s3_version_id | string |  |
| vintage_tag | string |  |
| drug_source_version_id | string |  |

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