Common billing error - Transmitter Supplier Number (TSN) errors

Many of the claims submitted through a trading partner (billing agent, clearinghouse) to date have Transmitter Supplier Number (TSN) errors. If your trading partner received a 999 rejection when submitting claims, you will need to verify:

- You have the correct TSN on the claim.
- The submitter/trading partner is currently enrolled.
- The submitter/trading partner is currently certified.
- The submitter/trading partner is linked to your provider record/NPI.

If you have questions about which TSN to use or the submitter/trading partner status, please contact your submitter/trading partner to verify the information.