The Centers for Medicare and Medicaid Services has announced that providers, clearinghouses, and billing agencies have “successfully” participated in the second ICD-10 end-to-end testing week, held April 27 through May 1.

Overall, participants in the week-long testing were able to successfully submit 88 percent of ICD-10 claims—23,138 test claims were received and 20,306 were accepted. The results are a step in the right direction. CMS reported that the acceptance rate for April was higher than January’s 81 percent acceptance rate, with an increase in test claims submitted and a decrease in the percentage of errors related to diagnosis codes.

Also See: CMS Touts Success of ICD-10 End-to-End Testing

The latest testing included approximately 875 providers and billing companies, with 1,600 National Provider Identifiers (NPIs) registered to test, representing what CMS called a “broad cross-section of provider, claim, and submitter types.” According to the agency, the testing demonstrated that CMS systems are ready to accept ICD-10 claims, emphasizing most of the claim rejections that occurred were unrelated to ICD-9 or ICD-10.

Reasons for rejected claims included: invalid submission of ICD-9 diagnosis or procedure code (1 percent) and invalid submission of ICD-10 diagnosis or procedure code (2 percent), incorrect NPI, Health Insurance Claim Number, or Submitter ID; dates of service outside the range valid for testing; invalid HCPCS codes; and invalid place of service—errors that CMS said also occurred in the January end-to-end testing week.

As far as professional and supplier claims submitted during the April testing, there were no issues identified and zero rejects due to front-end CMS systems issues, reports the agency. However, in the area of institutional claims, there was one issue identified related to system edits: certain inpatient hospital test claims were inappropriately processed due to a systems issue with codes that are exempt from Present on Admission reporting. CMS states that the issue will be resolved prior to the July end-to-end testing week, and testers will have an opportunity to re-submit these test claims.

In a statement issued by the Coalition for ICD-10, the organization congratulated CMS on the success of its April end-to-end testing which it said demonstrated that the agency’s systems are ready to accept ICD-10 claims. Specifically, it referenced the fact that there were zero claims rejected due to front-end CMS system issues for professional and supplier claims. Further, the Coalition for ICD-10 noted that of the 23,138 test claims received, half were professional claims.

“With four months remaining to correct issues discovered during testing, the high rate of successful submission of ICD-10 codes is especially encouraging for physician offices since half the claims submitted for end-to-testing were professional claims,” according to the organization. “These results indicate that significant progress has been made since the January end-to-end testing with the overall rejection rate dropping from 19 to 12 percent and ICD-10 rejections dropping from 3 to 2 percent.”

Though the organization acknowledged that 12 percent of claims submitted for end-to-end testing were rejected, it pointed out that only two percent of the rejections were due to invalid submission of an ICD-10 diagnosis or procedure code and that the “remaining rejections were for non-ICD-10 related errors that have no bearing on ICD-10 implementation and would be rejected under ICD-9.”

According to CMS, a final ICD-10 end-to-end testing week will be held July 20-24. However, the agency said it is no longer accepting volunteers for this testing. CMS did emphasize that those who participated in the January and April end-to-end testing weeks are automatically eligible to test again in July.

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