Since the Pharmacist Consultation Note further specializes the Consultation Note template beyond what's defined in C-CDA, I think it would make sense for it to have its own templateId in addition to the Consultation Note one. That is, we'd have three (since it would conform to all three of these):

<!-- US Realm Header -->
<templateId root="2.16.840.1.113883.10.20.22.1.1" extension="2015-08-01" />
<!-- Consultation Note -->
<templateId root="2.16.840.1.113883.10.20.22.1.4" extension="2015-08-01" />
<!-- Pharmacist Consultation Note -->
<templateId root="?" extension="?" />