# MA county ratebook, exact cents, one state key, territory rows kept

`medicare_semantic.vw_ma_county_ratebook_v3` · Medicare Advantage, Part D, Medicaid · status live · 42,218 rows

The county benchmark CMS publishes with each Rate Announcement, per SSA county and rate year: the rate at the 5%, 3.5% and 0% quality-bonus tiers and the ESRD rate, in exact cents (decimal(10,2)), with state_code taken from the SSA prefix so one key finds every year. A view over medicare_silver.ma_county_ratebook_v2 (parser 0.2.0); get_ma_county_ratebook reads it from 2026-10-05 and filters on state_code.

**Grain.** One row per (rate_year, ssa_county_code). 42,218 rows over rate years 2015-2027: the served table's 42,200 rows plus 18 territory-wide rows (Athena 3800cd23).

| column | type | meaning |
|---|---|---|
| rate_year | int |  |
| ssa_county_code | string |  |
| state_code | varchar(2) |  |
| state_name | varchar(24) |  |
| state_name_legacy | string |  |
| county_name | string |  |
| territory_wide_row | boolean |  |
| rate_5pct_bonus | decimal(10,2) |  |
| rate_3_5pct_bonus | decimal(10,2) |  |
| rate_0pct_bonus | decimal(10,2) |  |
| rate_esrd | decimal(10,2) |  |
| effective_period_start | date |  |
| effective_period_end | date |  |
| source_url | string |  |
| sha256_content_hash | string |  |
| bronze_publication_id | string |  |
| asserted_at | timestamp |  |
| parse_revision | int |  |
| parser_artifact_hash | string |  |
| cms_vintage_sequence | int |  |

Query it: `query_substrate` with `SELECT ... FROM medicare_semantic.vw_ma_county_ratebook_v3 WHERE ... LIMIT 100`; read `describe_data_source("medicare_semantic.vw_ma_county_ratebook_v3")` first.