ICD10 coding linking to CPT

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Hello all - general question. My knowledge has always been to make sure to have your CPT code be linked to the 1st appropriate ICD10 code (when there are several for that DOS). I generally leave the rest of the ICD10 codes on. In other words, when there are several ICD10 codes for a particular visit I don't remove them, after 1st linking to any appropriate code(s) for a given CPT. (hope this isn't too confusing!!). In the past I found that insurance companies will pay as long as the 1st code shows the required medical necessity for the CPT code being billed regardless of the ICD10 codes that may follow it. Is this what most are finding???