CMS accepted an average of 89% of ICD-10 claims submitted during the national front-end testing week in March, the agency announced.
Currently, CMS accepts 95%-98% of fee-for-service Medicare claims.
To be processed correctly, claims must include a valid diagnosis code that matches the date of service and a valid national provider identifier. During the testing, claims using ICD-10 needed an ICD-10 companion qualifier code while the ICD-9 claims used the ICD-9 qualifier code. CMS rejected claims that did not meet these requirements.
Some providers included intentional errors in their claims, according to CMS.
Approximately 2,600 providers, suppliers, billing companies and clearinghouses (approximately 5% of all submitters) participated in the testing week. Clearinghouses, which submit claims on behalf of providers, submitted 50% of all test claims.
Providers, suppliers, billing companies, and clearinghouses can submit acknowledgement test claims anytime up to the anticipated October 1, 2015 implementation date.
CMS will conduct end-to-end testing in 2015 and will release more details in the future.