No Grace Period for ICD-10


February 2015

The Centers for Medicare & Medicaid Services (CMS) will not allow for dual processing of International Classification of Diseases (ICD)-9 and ICD-10 codes for dates of service on or after the ICD-10 implementation date of Oct. 1, 2015.

Notification for a discrete implementation date for ICD-10 coding appeared in a Feb. 20 revision of the Medicare Fee-For-Service (FFS) Claims Processing Guidance for ICD-10. 

As noted in the Medicare Learning Network (MLN) Matters piece SE1408 ...many providers and payers, including Medicare have already coded their systems to only allow ICD-10 codes beginning Oct. 1, 2015. The scope of systems changes and testing needed to allow for dual processing would require significant resources and could not be accomplished by the Oct. 1, 2015 implementation date. Should CMS allow for dual processing, it would force all entities with which we share data, including our trading partners, to also allow for dual processing. In addition, having a mix of ICD-9 and ICD-10 codes in the same year would have major ramifications for CMS quality, demonstration and risk adjustment programs.

MLN Matters SE1408 is a reissued version of MM7492. The only revision states that CMS will not allow dual processing of ICD-9 and ICD-10 codes. All other information in the article remains the same.

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Refer to the ACR ICD-10 Resources Page for more information.

Want to get ready for ICD-10? Read the Bulletin's survival guide.

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