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CALs is an abbreviated process, similar to the NCD process, for making changes to the coding component of the negotiated laboratory NCDs. The process is used for adjusting the list of covered (or non-covered) ICD-9-CM diagnosis codes and coding guidance in the NCDs when there is a question regarding whether the code flows from the narrative indications in the NCD. A tracking sheet is posted opening a CAL and a 30-day public comment period follows. A decision memorandum announcing and explaining the decision is posted following the comment period. Changes are implemented in the next available quarterly update of the laboratory edit module. More details regarding the process can be found in 68 FR 74607.

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