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PHIS is a comprehensive pediatric database containing clinical and financial data from millions of patient encounters. It was developed by the Children's Hospital Association (CHA) - a business alliance networking 51 leading children's hospitals - to provide a rich data source for administrative data analysis. It has been used by academic clinicians to conduct comparative effectiveness studies that affect hospitalized children, and by hospital administration to compare outcomes and best practices against peer hospitals.

This site is for PHIS analysts and project participants. Find information here about best practices and what the data does and does not say, and exchange information about how you have used PHIS.

Visit C.S. Mott's Leveraging PHIS Data for an overview of PHIS.

Please do not share private health information (PHI) in this space.

What is PHIS?

The Pediatric Health Information System is a data set composed of administrative data provided by more than 50 children's hospitals. It contains blinded data about patient diagnoses, procedures, length of stay, readmissions, APR-DRGs, CMI and more, providing opportunities to benchmark processes and practices against other children's hospitals.

Looking for the PHIS request form?

Check out PHIS training and webinar information on CHA's website:

Request Access

UMHS faculty and staff may request access to PHIS by contacting David Cruz. Training is required for both standard and ad hoc reporting.

Join the PHIS Users Group

A PHIS users group meets the 3rd Wednesday of each quarter (January, April, July, October) from 1 to 2:30pm in 12-607. The PHIS program coordinator sends the agenda, room number and teleconference number prior to each meeting. If there are no relevant agenda items, the meeting is canceled.

Questions? Contact David Cruz


PHIS data is updated through September 2017. Information about the most recent data upload is available on CHA's website:

Presentations from the recent Fall Pediatric Analytics Conference are now available on the conference page on the PHIS website. Registration is now open for the March 8 Quality and Safety in Children's Health Conference in San Diego. 2018 Quality and Safety in Childrens Health Conference  

Effective October 1, the PHIS cohort builder data extraction tool has added 33 data elements, a new CPT extraction package and a new filter on CPT codes. Modifications are listed here.

Alert: CHA has alerted us that Total Costs (RCC Based) are understated by 1-3% overall for years 2007 thru 2016 and 4-7% for years 2004 thru 2006; the rate for individual cases or patient populations may vary. (See attachment for overall findings.) NOTE: PHIS Standard Reports do NOT use Total Costs (RCC Based) nor are Total Costs (RCC Based) used in Executive Insight Series Reports. This issue does not affect billed charges.

How Does This Impact Us?
• This issue is limited to reports that include “Adj Total Costs (RCC Based)” or “Total Costs (RCC Based)”.
• Cohort Builder analysis that included the following extraction packages is not accurate.
   o Ratio of Cost to Charge Based Cost
   o Ratio of Cost to Charge Based Cost with Patient Data