# CMS MA / Part D Landscape member ledger (one row per publisher CSV member parsed)

`medicare_silver.ma_landscape_member_ledger` · Medicare Advantage, Part D, Medicaid · status live · 169 rows

The parse ledger behind fact_ma_landscape: which publisher file member produced which year and category, under which header signature, with the exact header-to-column mapping applied. Read it to explain any Landscape number back to its file.

**Grain.** One row per parsed CSV member per report_year: member name, sha256, header signature, mapping applied, ignored columns, rows parsed/skipped; 169 members on 2026-09-07.

| column | type | meaning |
|---|---|---|
| report_year | int |  |
| member | string |  |
| member_sha256 | string |  |
| record_family | string |  |
| signature_id | string |  |
| signature_sha256 | string |  |
| header_as_published | string |  |
| mapping | string |  |
| ignored | string |  |
| rows_parsed | bigint |  |
| rows_skipped_no_contract | bigint |  |
| categories | 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 medicare_silver.ma_landscape_member_ledger WHERE ... LIMIT 100`; read `describe_data_source("medicare_silver.ma_landscape_member_ledger")` first.