California Hospital 30-Day Readmission Rates by Demographics

California statewide data contains the number and unadjusted rate for all-cause, unplanned, 30-day inpatient readmissions. Data is categorized by age, sex, race/ethnicity, expected payer, and county. The dataset is provided by the State of California.

Use Cases

• Analyze readmission rate disparities across race/ethnicity categories to identify health equity gaps.
• Model the relationship between expected payer type and unplanned 30-day readmission rates.
• Compare county-level readmission rates segmented by age and sex demographics.
• Benchmark hospital performance on the LGHC indicator for all-cause, unplanned readmissions.

Strengths

• Data is categorized by five key demographic and administrative dimensions: age, sex, race/ethnicity, expected payer, and county.
• Provides both raw counts and calculated rates for the 30-day readmission measure.
• Dataset is maintained and updated by the authoritative State of California organization.

Limitations

• The core readmission rate is unadjusted, limiting direct comparisons without accounting for population risk factors.
• Sample data and row counts are unavailable, preventing assessment of dataset scale and granularity.
• Specific data collection methodology and temporal coverage are not detailed in the input.

Provenance

Source

State of California, Department of Health Care Access and Information.

Collection Method

Statewide collection of hospital inpatient readmission records.

Freshness

Last updated on 2026-02-23.

Geography

State of California, with county-level breakdowns.