Unplanned Hospital Visits - National

Unplanned Hospital Visits: national data.

Part of the CMS Data Feeds Dataset › Medicare

Dataplex delivers this CMS feed as the analysis-ready table DWV.UNPLANNED_HOSPITAL_VISITS__NATIONAL on Snowflake and Databricks — six snapshot releases spanning 2024–2026, 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.UNPLANNED_HOSPITAL_VISITS__NATIONAL
Databricks	cms_dwv.unplanned_hospital_visits__national
Update pattern	Full-refresh — each file replaces the prior snapshot
CMS published	2026-04-21
Loaded	2026-05-15
Columns	14 data + 6 lineage
File versions	6
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 2026-04-21. Coverage runs through 2026-04-21. Next CMS release expected ~Jul 2026.

Full-refresh feed — each file version is a complete snapshot and newer files supersede older ones. Filter to the latest file (see the sample query) to avoid double-counting across versions.

Sample queries

Snowflake

-- Latest snapshot only (avoids double-counting across file versions)
SELECT *
FROM DWV.UNPLANNED_HOSPITAL_VISITS__NATIONAL
WHERE FILE_ID IN (
  SELECT ID FROM DWV.FEEDS_FILES WHERE IS_LATEST = 1
)
LIMIT 100;

Databricks

About this feed

Unplanned Hospital Visits: national data. This data set includes national-level data for the hospital return days (or excess days in acute care [EDAC]) measures, the unplanned readmissions measures, and measures of unplanned hospital visits after outpatient procedures.

— Source: CMS feed metadata

Keywords: Medicare, Unplanned Hospital Visits - National Theme: Medicare

Coverage timeline

2024 🟩 · 2025 🟩 · 2026 🟩

3 of 3 years with snapshot releases — no gaps.

Release history

Reporting period	CMS published	Loaded	Latest file
Snapshot as of 2026-04-21	2026-04-21	2026-05-15	✓
Snapshot as of 2026-01-26	2026-01-26	2026-02-28
Snapshot as of 2025-10-14	2025-10-14	2025-11-28
Snapshot as of 2025-07-16	2025-07-16	2025-08-06
Snapshot as of 2025-01-08	2025-01-08	2025-02-27
Snapshot as of 2024-10-10	2024-10-10	2024-12-14

Data dictionary

📋 14 data columns + 6 lineage columns

Column-level definitions are maintained by CMS in the official Unplanned Hospital Visits - National data dictionary.

Data columns

Column	Type
MEASURE_ID	TEXT
MEASURE_NAME	TEXT
NATIONAL_RATE	TEXT
NUMBER_OF_HOSPITALS_WORSE	TEXT
NUMBER_OF_HOSPITALS_SAME	TEXT
NUMBER_OF_HOSPITALS_BETTER	TEXT
NUMBER_OF_HOSPITALS_TOO_FEW	TEXT
FOOTNOTE	TEXT
START_DATE	DATE
END_DATE	DATE
NUMBER_OF_HOSPITALS_FEWER	TEXT
NUMBER_OF_HOSPITALS_AVERAGE	TEXT
NUMBER_OF_HOSPITALS_MORE	TEXT
NUMBER_OF_HOSPITALS_TOO_SMALL	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.MEASURE_ID, d.MEASURE_NAME, d.NATIONAL_RATE,
       ff.TEMPORAL_START, ff.TEMPORAL_END, ff.CMS_FEED_MODIFIED
FROM DWV.UNPLANNED_HOSPITAL_VISITS__NATIONAL d
JOIN DWV.FEEDS_FILES ff ON d.FILE_ID = ff.ID;

Source & provenance

Published by the Centers for Medicare & Medicaid Services.

• Official CMS documentation

Frequently asked questions

How often is Unplanned Hospital Visits - National updated?

CMS last published this feed on 2026-04-21. New releases are added automatically when CMS publishes them.

What years does Unplanned Hospital Visits - National cover?

2024 through 2026.

How many records are in Unplanned Hospital Visits - National?

Count the current snapshot yourself once the share is mounted:

SELECT COUNT(*)
FROM DWV.UNPLANNED_HOSPITAL_VISITS__NATIONAL d
JOIN DWV.FEEDS_FILES ff ON d.FILE_ID = ff.ID
WHERE ff.IS_LATEST = 1;

How do I get Unplanned Hospital Visits - National 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.UNPLANNED_HOSPITAL_VISITS__NATIONAL directly — no pipeline setup required.

Related feeds

Market Saturation & Utilization Core-Based Statistical AreasMedicare Durable Medical Equipment, Devices & Supplies - by Geography and ServiceAccountable Care Organization ParticipantsOutpatient Imaging Efficiency - HospitalHealth Equity - State

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].

---

Part of the CMS Data Feeds Dataset — 280+ feeds · 245B+ records · updated daily. Back to the full catalog →