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Mapping two or more SNOMED CT instead of one

We are mapping two or more SNOMED CT instead of one.(some diagnosis)
It is intended to better reflect the meaning of the two terms by MAPPING them when there is no SNOMED CT terminology that reflects the diagnosis.
Would not this practice be a problem in future CDM conversions? If so, How can I solve the problem?

@soyoung_YI:

Sorry about the extended silence. General craziness of things.

Not sure I understand the problem. Are you asking about mapping from one source code to two SNOMED concepts? Why is that a problem?

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