The ICD-10 coding system replaced ICD-9 on October 1, 2015 after two delays. During the delays CMS and NCHS continued to review and accept suggestions for additions and revisions but were not allowed to implement the changes due to the mandated code freeze.
All of the changes compiled over the past three years will be included in the 2017 edition of ICD-10. It is absolutely mandatory that every provider, facility and payer updates their ICD-10 coding resources for 2017.
IMPORTANT NOTICE: Only the PMIC ICD-10-CM 2017 includes the new 2017 Coding Guidelines.
The Optum version does not include the 2017 Guidelines.