On Wednesday, June 25, 2025, from 6:00 pm to 10:00 pm Eastern Time, the Commercial Driver’s License Information System (CDLIS) Gateway will be intermittently unavailable due to scheduled system maintenance. Clearinghouse users may experience issues verifying driver information during this maintenance time.
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United States Department of Transportation
FMCSA - Federal Motor Carrier Safety Adminstration

Drug & Alcohol Clearinghouse

Learning Center

This Learning Center is designed to help you stay compliant with the requirements of the Clearinghouse rule, thereby improving safety on your Nation’s roadways.

Visit the external links at right to learn more about the Department of Transportation’s and FMCSA’s drug and alcohol testing program. Review the resources below to learn about how the Clearinghouse supports this program. You can sign up to receive email updates when new resources are added.

How will you use the Clearinghouse?

FMCSA has developed several materials to assist you in fulfilling your Clearinghouse requirements, including many that are customized by user type. Browse the categories below to find the information you need.

MRO Resources

Download Resources for Medical Review Officers

Not yet registered? Visit the Register page to download instructions and get started.

Using the Clearinghouse
Learn About the Clearinghouse

SAP Resources

Download Resources for Substance Abuse Professionals

Not yet registered? Visit the Register page to download instructions and get started.

Using the Clearinghouse
Learn About the Clearinghouse

Read the Clearinghouse Frequently Asked Questions

Browse by categories, filter by user type, or use the search box to find the information you need. Visit the FAQs page.

News and Events

Get the latest news from FMCSA about the Drug and Alcohol Clearinghouse
FMCSA releases March 2025 Clearinghouse Monthly Summary Reports
  • May 29, 2025

FMCSA has released the latest Clearinghouse Monthly Summary Report, covering data reported to the Clearinghouse through March 2025. The report includes information on the number of Clearinghouse registrations, queries conducted, violations reported, and drivers in the return-to-duty (RTD) process. You can also use the links below to download PDF versions of the previous reports.

March 2025 Report
February 2025 Report
January 2025 Report

December 2024 Report
November 2024 Report
October 2024 Report
September 2024 Report
August 2024 Report
July 2024 Report
June 2024 Report
May 2024 Report
April 2024 Report
March 2024 Report
February 2024 Report
January 2024 Report

December 2023 Report
November 2023 Report
October 2023 Report
September 2023 Report
August 2023 Report
July 2023 Report
June 2023 Report
May 2023 Report
April 2023 Report
March 2023 Report
February 2023 Report
January 2023 Report

December 2022 Report
November 2022 Report
October 2022 Report
September 2022 Report
August 2022 Report
July 2022 Report
June 2022 Report
May 2022 Report
April 2022 Report
March 2022 Report
February 2022 Report
January 2022 Report

December 2021 Report
November 2021 Report
October 2021 Report
September 2021 Report
August 2021 Report
July 2021 Report
June 2021 Report
May 2021 Report
April 2021 Report
March 2021 Report
February 2021 Report
January 2021 Report

December 2020 Report
November 2020 Report
October 2020 Report
September 2020 Report
August 2020 Report
July 2020 Report
June 2020 Report
May 2020 Report

Download March 2025 Report
UPDATE: 2020 Q&A Sessions with FMCSA
  • December 2020
  • via webinar
  • Employers, Owner-Operators, C/TPAs, MROs, SAPs, Drivers

In December 2020, FMCSA hosted a second series of live informational webinars to help users understand the requirements for the Clearinghouse. The presentations walked through Clearinghouse features and included time for questions. A recording of the webinars is posted below, along with the presentation.

Clearinghouse for Employers and Consortia/Third-Party Administrators (C/TPAs)
Watch webinar recording
Download presentation slides

Clearinghouse for Substance Abuse Professionals (SAPs) and Medical Review Officers (MROs)
Watch webinar recording
Download presentation slides

Clearinghouse for CDL Drivers
Watch webinar recording
Download presentation slides

Clearinghouse Registration: Instructional Job Aids Available
  • November 11, 2019
  • All Users

Authorized users can register in the Clearinghouse.

Instructional job aids are available for:

Employers, C/TPAs, MROs, and SAPs can also invite users to complete required actions in the Clearinghouse on their behalf. These users would register as Clearinghouse Assistants.

Employers: Do you have an FMCSA Portal account? Follow these instructions to make sure you have the correct Clearinghouse Portal user role before you register.

Register Now
Query Plans Now Available for Purchase
  • November 4, 2019
  • Employers, Owner-Operators, C/TPAs

Employers of CDL drivers can now purchase a query plan. Purchasing a query plan enables employers, and their designated consortia/third-party administrators (C/TPAs), to query the Clearinghouse for information on potential and currently employed drivers. All queries require driver consent.

Query plans may be purchased only on the FMCSA Clearinghouse website by registered employers. Visit https://clearinghouse.fmcsa.dot.gov/query/plan to learn more. C/TPAs may not purchase query plans on behalf of an employer.

Purchase a Query Plan

Need more information about the Clearinghouse?

If you cannot find the answer to your question in the FAQs you can contact FMCSA.