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Medicare Ground Ambulance Data Collection System

Guidance for requirements for participation in the Medicare Ground Ambulance Data Collection System.


Issued by: Centers for Medicare & Medicaid Services (CMS)

Issue Date: April 10, 2013

Effective January 1, 2020–2024, CMS will select ground ambulance providers and suppliers to participate in the Medicare Ground Ambulance Data Collection System (GADCS). To learn more, view these FAQs (PDF) - Updated 11/02/2023.

Selected Providers & Suppliers

What to do if we select your organization

How do I register for the GADCS Portal?

Attention:  Ground Ambulance Organizations Selected in Year 1 and Year 2 that are Required to Report Under the Medicare Ground Ambulance Data Collection System (GADCS):

Selected ground ambulance organizations in Year 1 and Year 2 are required to collect data beginning in 2022 and report beginning in 2023 (within 5 months after your data collection period ends).  We are pleased to announce that the system you will use to report your data, the GADCS portal, was deployed on December 30, 2022 and is now live.  Please refer to this document for more information on how to access the system: Quick Tips on Registration and Requesting Access to the GADCS Portal (PDF).

Overview of the Timeline for the Data Collection & Data Reporting Requirements under the GADCS

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What happens if your organization doesn’t provide data

If CMS selects your organization to participate, but your organization doesn’t report the required information, your organization will be subject to a 10% reduction in payments under the AFS for a calendar year. Your organization won’t get a reduction in payments if we’ve granted a hardship exemption or after an informal review concludes that your organization is not subject to the 10% reduction in payments.

Goal of the system

The collected information will be analyzed by the Medicare Payment Advisory Commission (MedPAC) in order to submit a report to Congress on the:

  • Information you submit through the data collection system
  • The adequacy of payments for ground ambulance services and geographic variations in the cost of furnishing such services
  • Analysis of any burden on you associated with the data collection system
  • Recommendation as to whether information should continue to be submitted through the data collection system or if changes are needed

Proposed and Final Rules on the Establishment of the Medicare Ground Ambulance Data Collection System

Upcoming Events

See upcoming and past events.

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DISCLAIMER: The contents of this database lack the force and effect of law, except as authorized by law (including Medicare Advantage Rate Announcements and Advance Notices) or as specifically incorporated into a contract. The Department may not cite, use, or rely on any guidance that is not posted on the guidance repository, except to establish historical facts.