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First-time Users: Please login with your UMLS username and password. This will provide you with access to the Veterinary Extension to SNOMED CT download files. You will be offered an opportunity to request additional access, to resources such as the AAHA Diagnostic Terms on the "My Profile" page. If you do not have a UMLS account or can not remember your UMLS credentials, please visit UMLS Terminology Services on the National Library of Medicine website.

Existing VTSL Users: Please login with your existing username and password below. If you would like to switch your VTSL account to use UMLS credentials please contact us at vtsl.info@gmail.com