MA Enrollment by SCC
Provides monthly enrollment at the state/county/contract level for all organization types except for PDP and employer-direct PDP.
Part of the CMS Data Research Dataset › Medicare Advantage
Dataplex delivers this CMS research table as the analysis-ready table DWV.MONTHLY_MA_ENROLLMENT_BY_STATE_COUNTY_CONTRACT on Snowflake — coverage from 2006 to 2026 in a single aligned schema, refreshed automatically whenever CMS publishes a new file. Every row carries lineage back to the exact CMS source file that produced it.
Key facts
Snowflake
DWV.MONTHLY_MA_ENROLLMENT_BY_STATE_COUNTY_CONTRACT
Coverage
Nov 2006 – Jul 2026
Rows
73,442,634 (total across all reporting periods)
Cadence
Monthly
Update pattern
Time-partitioned — each file adds one reporting period
Latest report period
2026-07-01
Loaded
2026-07-16
Columns
9 data + 5 lineage
Identifiers
Contract ID (H-number) · FIPS codes · State & county · SSA state/county codes
File versions
237
License
CMS public data — U.S. Government work
Platforms
Snowflake Marketplace
Included in the CMS Data Research Dataset — start a free trial on Snowflake Marketplace.
Current — data runs through the Jul 2026 report period. Next CMS release expected ~Aug 2026.
Partitioned by report period — each file version covers one report period and history is additive. The sample query below returns the latest report period; drop the WHERE clause to query the full history.
Sample queries
About this feed
Provides monthly enrollment at the state/county/contract level for all organization types except for PDP and employer-direct PDP. Note: An abridged version is also provided that excludes rows with 10 or less enrollees.
— Source: CMS feed metadata
Theme: Medicare Advantage
Coverage timeline
2006–2026 🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩 (🟩 covered · ⬜ no data)
21 of 21 years covered — no gaps.
Release history
Data dictionary
📋 9 data columns + 5 lineage columns
Data columns
COUNTY
TEXT
STATE
TEXT
CONTRACT_ID
TEXT
ORGANIZATION_NAME
TEXT
ORGANIZATION_TYPE
TEXT
PLAN_TYPE
TEXT
SSA_CODE
NUMBER
FIPS_CODE
NUMBER
ENROLLED
NUMBER
Lineage columns (present on every feed table)
ROW_ID
TEXT
Unique row ID for this table (PK)
FILE_ID
TEXT
Source file — joins to FEEDS_FILES.ID (FK)
FILE_FEED_ID
TEXT
Parent feed — joins to FEEDS.ID (FK)
FILE_NAME
TEXT
Source file name as published by CMS
ROWNUM
NUMBER
Row number within the source file
Row-level lineage
Every row in this table traces to the exact CMS source file that produced it. The FILE_ID column joins to the FEEDS_FILES catalog table, and FILE_FEED_ID joins to the FEEDS master table:
Trace any row back to its source file and reporting period:
Source & provenance
Published by the Centers for Medicare & Medicaid Services.
Frequently asked questions
How often is MA Enrollment by SCC updated?
Monthly. CMS last published this feed on 2026-07-01, and Dataplex loaded it to the warehouse on 2026-07-16. New releases are added automatically when CMS publishes them.
What years does MA Enrollment by SCC cover?
2006 through 2026.
How many records are in MA Enrollment by SCC?
73,442,634 rows across all 237 report periods. Because this feed is partitioned by report period, the full table total is the meaningful count — no deduplication needed.
How do I get MA Enrollment by SCC data?
It's included in the CMS Data Research Dataset on the Snowflake Marketplace (free trial available). Once mounted, query DWV.MONTHLY_MA_ENROLLMENT_BY_STATE_COUNTY_CONTRACT directly — no pipeline setup required.
Related feeds
MA Enrollment by SCPMA Contract Service AreaMA State/County PenetrationGet this feed
Mount the share — the database and
DWVschema appear in your account immediatelyRun the sample query above — no ETL, no pipeline maintenance
Questions about this feed? Contact us at notifications@dataplex-consulting.com.
Part of the CMS Data Research Dataset — 22 research tables · 20 years of Medicare Advantage & Part D history · updated daily. Back to the full catalog →
Last updated