The date was finalized when the U.S. Department of Health and Human Services issued a final rule (pdf) on July 31.
The final rule — "Administrative Simplification: Change to the Compliance Date for the International Classification of Diseases, 10th Revision (ICD–10–CM and ICD-10-PCS) Medical Data Code Sets" — will be released in the Federal Register on August 4.
The rule also requires providers to continue to ICD-9 for services provided through Sept. 30, 2015.
In March, the compliance deadline for ICD-10 was pushed back from Oct. 1, 2014. This followed an August 2012 rule that pushed the transition date to ICD-10 from Oct. 1, 2013, to Oct. 1, 2014.