Medicare Fee-for-Service Comprehensive Error Rate Testing

The Medicare Fee-for-Service (FFS) Comprehensive Error Rate Testing (CERT) dataset provides information on a random sample of FFS claims to determine if they…

Part of the CMS Data Feeds Dataset › Medicare

Dataplex delivers this CMS feed as the analysis-ready table DWV.MEDICARE_FEEFORSERVICE_COMPREHENSIVE_ERROR_RATE_TESTING on Snowflake and Databricks — 16 annual reporting periods (2011–2025) aligned to a single 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.MEDICARE_FEEFORSERVICE_COMPREHENSIVE_ERROR_RATE_TESTING
Databricks	cms_dwv.medicare_feeforservice_comprehensive_error_rate_testing
Coverage	Jan 2011 – Dec 2025 (15 of 15 annual reporting periods)
Rows	3,034,628 (total across all reporting periods)
Cadence	Annual
Update pattern	Time-partitioned — each file adds one reporting year
CMS published	2026-02-03
Loaded	2026-02-03
Columns	8 data + 6 lineage
Identifiers	HCPCS codes
File versions	16
License	CMS public data — U.S. Government work
Platforms	Snowflake Marketplace · Databricks Delta Sharing

Included in the CMS Data Feeds Dataset — start a free trial on Snowflake Marketplace.

Current — CMS last published this feed on 2026-02-03. Coverage is complete through the 2025 reporting year. Next CMS release expected ~Feb 2027.

Time-partitioned feed — each file version covers one reporting year, so history is additive. Query the full table for all years; filter on the reporting period columns for a single period. Do not filter to the latest file only — that would return just the 2025 reporting year.

Sample queries

Snowflake

-- Each file version covers one reporting period — history is additive
SELECT *
FROM DWV.MEDICARE_FEEFORSERVICE_COMPREHENSIVE_ERROR_RATE_TESTING
LIMIT 100;

Databricks

About this feed

The Medicare Fee-for-Service (FFS) Comprehensive Error Rate Testing (CERT) dataset provides information on a random sample of FFS claims to determine if they were paid properly under Medicare coverage, coding, and payment rules. The dataset contains information on type of FFS claim, Diagnosis Related Group (DRG) and Healthcare Common Procedure Coding System (HCPCS) codes, provider type, type of bill, review decision, and error code.

Please note, each reporting year (RY) contains claims submitted July 1 two years before the report through June 30 one year before the report. For example, the 2025 data contains claims submitted July 1, 2023 through June 30, 2024.

— Source: CMS feed metadata

Keywords: Medicare, Original Medicare, Health Care Use & Payments Theme: Medicare

Coverage timeline

2011–2025 🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩 (🟩 covered · ⬜ no data)

15 of 15 annual reporting periods present — no gaps.

Release history

Reporting period	CMS published	Loaded	Latest file
2025-01-01 – 2025-12-31	2026-02-03	2026-02-03	✓
2024-01-01 – 2024-12-31	2025-10-28	2025-10-28
2024-01-01 – 2024-12-31	2024-12-03	2024-12-03
2023-01-01 – 2023-12-31	2023-12-28	2023-12-28
2022-01-01 – 2022-12-31	2023-03-06	2023-08-29
2021-01-01 – 2021-12-31	2022-01-13	2023-08-29
2020-01-01 – 2020-12-31	2021-05-20	2023-08-29
2019-01-01 – 2019-12-31	2021-05-20	2023-08-29
2018-01-01 – 2018-12-31	2021-05-20	2023-08-29
2017-01-01 – 2017-12-31	2021-05-20	2023-08-29

Show 6 earlier file versions

Reporting period	CMS published	Loaded	Latest file
2016-01-01 – 2016-12-31	2021-05-20	2023-08-29
2015-01-01 – 2015-12-31	2021-05-20	2023-08-29
2014-01-01 – 2014-12-31	2021-05-20	2023-08-29
2013-01-01 – 2013-12-31	2021-05-20	2023-08-29
2012-01-01 – 2012-12-31	2021-05-20	2023-08-29
2011-01-01 – 2011-12-31	2021-05-20	2023-08-29

Data dictionary

📋 8 data columns + 6 lineage columns

Column-level definitions are maintained by CMS in the official Medicare Fee-for-Service Comprehensive Error Rate Testing data dictionary.

Data columns

Column	Type
CLAIM_CONTROL_NUMBER	NUMBER
PART	TEXT
DRG	TEXT
HCPCS_PROCEDURE_CODE	TEXT
PROVIDER_TYPE	TEXT
TYPE_OF_BILL	TEXT
REVIEW_DECISION	TEXT
ERROR_CODE	TEXT

Lineage columns (present on every feed table)

Column	Type	Description
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
CREATED_AT	TIMESTAMP_NTZ	Timestamp when the record was loaded

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:

SELECT d.CLAIM_CONTROL_NUMBER, d.PART, d.DRG,
       ff.TEMPORAL_START, ff.TEMPORAL_END, ff.CMS_FEED_MODIFIED
FROM DWV.MEDICARE_FEEFORSERVICE_COMPREHENSIVE_ERROR_RATE_TESTING d
JOIN DWV.FEEDS_FILES ff ON d.FILE_ID = ff.ID;

Source & provenance

Published by the Centers for Medicare & Medicaid Services (bureau 009:38).

• Official CMS data dictionary

• Medicare Fee for Service Comprehensive Error Rate Testing Improper Payment Data Methodology

Frequently asked questions

How often is Medicare Fee-for-Service Comprehensive Error Rate Testing updated?

Annually. CMS last published this feed on 2026-02-03, and Dataplex loaded it to the warehouse the same day. New releases are added automatically when CMS publishes them.

What years does Medicare Fee-for-Service Comprehensive Error Rate Testing cover?

2011 through 2025 — 15 annual reporting periods with no gaps. Each reporting year arrives as its own file version, and all years remain queryable side by side.

How many records are in Medicare Fee-for-Service Comprehensive Error Rate Testing?

3,034,628 rows across all 16 reporting periods. Because this feed is time-partitioned, the full table total is the meaningful count — no deduplication needed.

How do I get Medicare Fee-for-Service Comprehensive Error Rate Testing data?

It's included in the CMS Data Feeds Dataset on the Snowflake Marketplace (free trial available) and via Databricks Delta Sharing. Once mounted, query DWV.MEDICARE_FEEFORSERVICE_COMPREHENSIVE_ERROR_RATE_TESTING directly — no pipeline setup required.

Related feeds

Medicare Post-Acute Care Utilization - Home Health Agency by Geography and ProviderHospital Service AreaMedicare Physician & Other Practitioners - by Geography and ServiceMedicare Post-Acute Care Utilization - HospiceMedicare Inpatient Hospitals - by Provider and Service

Get this feed

1. Start a free trial on Snowflake Marketplace or purchase via Databricks

2. Mount the share — the database and DWV schema appear in your account immediately

3. Run the sample query above — no ETL, no pipeline maintenance

Questions about this feed? Contact us at [e-mail].

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