CMS Data Element Library

The CMS Data Element Library (DEL) is the centralized resource for CMS assessment instrument data elements (e.g. questions and responses) and their associated health information technology (IT) standards.

DEL Mission and Goals

The mission of the Data Element Library (DEL) is to create a comprehensive, electronic, distributable, and centralized resource of CMS assessment instrument content.

In support of the Improving Medicare Post-Acute Care Transformation Act (IMPACT Act), the goals of the DEL are to:

In support of CMS' focus on "Patients over Paperwork", the DEL promotes interoperable health information exchange by linking CMS assessment questions and response options to nationally accepted health IT standards. Standardized and interoperable data support health information exchange across healthcare settings to facilitate care coordination, improved health outcomes, and reduced provider burden through the reuse of appropriate healthcare data.

Assessment Instruments

The DEL database includes post-acute care (PAC) assessment questions and their responses, as well as other associated details including the assessment version, item labels, item status, copyright information, CMS item usage, skip pattern information, lookback periods, and linked health IT Standards (e.g.- Logical Observation Identifiers Names and Codes (LOINC), and Systematized Nomenclature of Medicine -- Clinical Terms (SNOMED) when available).

Search All Elements

Compare Assessments


Unique to the First Version
Shared by Both Versions
Unique to the Second Version

About

This page is open source! Check out the source code and feel free to leave feedback or submit pull requests.

What is this?

This is a user interface redesign of the CMS Data Element Library. It intends to address some of the issues with the current DEL site, including:
  • The DEL Homepage mentions pages for FAQ, Help, and a User Guide but does not link to them anywhere on the site
  • It takes multiple clicks to get to any useful information on the site, including code set downloads and aggregated information reports
  • The Download HIT Codes output omits the following fields:
    • Section Name
    • Question Text
    • Skip Pattern Trigger
    • Lookback Period (days)
    • Status
    • Status Date
    • Item Use
    • Collection Time Period/Item Subset(s)
    • Parent Item ID
    • Copyright Information
  • The Download HIT Codes page omits the following items:
    • The entire Hospice Item Set (HIS) (versions 1.00.0 and 2.00.0)
    • IRF-PAI versions 1.10, 1.2, 1.3
    • LCDS versions 1.01, 2.01
    • MDS3.0 versions 1.00.2, 1.00.6, 1.10, 1.11, 1.12, 1.3
    • OASIS versions C1-102015, C1-012015, C-082009
  • There is no aggregate information about the assessment items (e.g., total data elements per assessment item, list of linked health IT standards used in each assessment item, etc.)
  • There are no links from this page to the authoritative sites for each of the assessment items (e.g., link IRF-PAI to https://www.cms.gov/Medicare/Medicare-Fee-for-Service-Payment/InpatientRehabFacPPS/IRFPAI.html)
  • There is no visualization of commonalities/discrepancies between the various data sets
  • From the Search and Report pages, there is no link back to the DEL Homepage

TODO list

  • Consolidate and serve all data that can be downloaded through the Download HIT Codes page
  • Implement a universal, instant search across all codes
  • Display all of the Assessment Item Versions with appropriate context for newcomers
  • Implement a diff tool to compare assessment data elements
  • Reduce the number of clicks necessary to get to important actions
  • Implement a general-purpose modal that returns all attributes of a data element
  • Implement CSV and JSON download links for Assessment Item versions
  • Scrape all missing data from the DEL and add it to the del.csv file
  • Build some kind of visualization to quickly illustrate data set attributes
  • Implement some kind of download for the 'Compare Assessment Versions' tool
  • Implement pagination for the 'Compare Assessment Versions' tool
  • Refactor and otherwise clean up all the JavaScript on index.html
  • Add more visual flair - transitions, sticky nav, etc.
  • Test responsive design elements