Patient Discharge Data

An inpatient discharge record is submitted each time a patient is treated in a licensed general acute care hospital in California. These facilities report their discharge data via the Medical Information Reporting for California System (MIRCal). The reported data includes patient demographic information, such as age, sex, county of residence, and race/ethnicity, diagnostic information, treatment information, disposition, total charges and expected source of payment. County Frequencies for hospital discharges by patient county of residence as well as ICD-9-CM Code Frequencies can be downloaded below.

Patient Discharge Data (IP) Facility Summary Reports

Patient level data are reported through the MIRCal system. Facility Summary Reports display a numerical and percentage breakdown of patient level data, combining semi-annual report periods into an annual view of a facility's Hospital Inpatient discharge patient level data.


Due to its size, the Patient Discharge Data file has been broken down into several frequency tables. These tables are grouped into two sections:

  • Frequencies by County
    These frequency tables display discharge totals and average length of stay for a selected group of data elements by county.
  • ICD-9-Code Frequencies
    These tables include diagnostic codes, condition present upon admission, procedure codes, and external injury codes.

Other Information

To order a Public Use File, see our Data Request Center

View information for Emergency Department & Ambulatory Surgery Data.

This page was last updated on Friday, May 26, 2017.

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