# MA State/County Penetration, county codes at their documented width

`medicare_semantic.vw_ma_state_county_penetration_v2` · Medicare Advantage, Part D, Medicaid · status live · 707,500 rows

Medicare eligibles, MA enrollees and MA penetration per county and month from CMS's MA State/County Penetration files, with FIPSST / SSAST padded to 2 digits, FIPSCNTY / SSACNTY to 3, and FIPS / SSA rebuilt as the concatenated state + county codes the publisher's readme defines (Read_Me_SC_Penetration_MA_YYYY.txt). CMS printed the codes without leading zeros in 2025-01, 2025-02, 2025-03 and 2026-08; every other month is unchanged. codes_padded_by_view marks the rows the view changed.

**Grain.** One row per (fipsst, fipscnty, report_month); the rows of medicare_silver.ma_state_county_penetration (707,500 over 220 months, view minus table = 0 and 0 duplicate (fips, report_month); Athena 8614613f-53f9-495e-966d-95afcc5eb49c).

| column | type | meaning |
|---|---|---|
| fipsst | string |  |
| fipscnty | string |  |
| report_month | date |  |
| state_name | string |  |
| county_name | string |  |
| fips | string |  |
| ssast | string |  |
| ssacnty | string |  |
| ssa | string |  |
| eligibles | int |  |
| enrolled | int |  |
| enrolled_lower_bound | int |  |
| enrolled_upper_bound | int |  |
| penetration | double |  |
| suppression_reason_code | string |  |
| codes_padded_by_view | 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 |  |

Query it: `query_substrate` with `SELECT ... FROM medicare_semantic.vw_ma_state_county_penetration_v2 WHERE ... LIMIT 100`; read `describe_data_source("medicare_semantic.vw_ma_state_county_penetration_v2")` first.