Sub acute detox facility using outpatient facility NPI

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We will soon offer sub acute detox for SUD at our outpatient/sober living complex. It will have a separate building with a separate address, but we are wanting to still use the same company. How do we do this? Would it depend on the NPI? Would it need to be different than our outpatient NPI? Does this depend on state policy? Where can I find resources to shed some light on this?