# CMS Basic Stand Alone sample claims: hospice beneficiary summaries

`medicare_silver.cms_bsa_hospice_beneficiary` · Medicare Advantage, Part D, Medicaid · status live · 55,473 rows

The CMS Basic Stand Alone (BSA) Medicare claims public use files, hospice beneficiary summaries: a 5% beneficiary sample, de-identified, 2008 to 2010. Claim-level and real, and old; the only claim-level Medicare data that is public.

**Grain.** One row per source row of the CMS BSA public use file (row_values_json carries the published columns; native_grain names the file's own grain).

| column | type | meaning |
|---|---|---|
| data_year | int |  |
| family | string |  |
| native_grain | string |  |
| sample_design | string |  |
| source_asset_id | string |  |
| source_member | string |  |
| source_part | int |  |
| source_row_number | bigint |  |
| column_count | int |  |
| row_values_json | string |  |
| row_sha256 | string |  |
| joinability_guard | string |  |
| quality_flags | string |  |
| is_analytics_eligible | boolean |  |
| 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.cms_bsa_hospice_beneficiary WHERE ... LIMIT 100`; read `describe_data_source("medicare_silver.cms_bsa_hospice_beneficiary")` first.