Welcome to the Optum Transaction Testing Service-Classic site. Transaction Testing Service is the industry-leading X12 4010A1 and 5010 testing and certification solution that improves operating margins through up-front error identification and correction. Help ensure your EDI transactions are compliant with standards, regulations and payer requirements.

For the latest ICD-10 and 5010 news, please access the Resources area of this site.

Optum Transaction Testing Service Subscribers:

Sign in to Optum Transaction Testing Service by clicking the Sign In tab and entering your Optum ID. If you have sign in questions please contact the Optum ID Support Team at 1-855-819-5909 or optumcloudsupport@optum.com.

Not a Transaction Testing Service Subscriber?

Register for your Optum ID so you can begin testing and certifying your transactions and help ensure compliance between trading partners. You can also sign up for a free 48-hour trial account.


Phone: 1-800-765-6089
Email: TransactionTestingService.Sales@optum.com