One brand, one website, one navigation, but a dedicated page per location (one each for DHA Lahore, Gulberg, Clifton, F-7, etc.). Each location page includes the location-specific address, GBP listing link, phone, opening hours, lead practitioner for that branch, and inquiry routing to that branch's WhatsApp number.
Procedure pages don't duplicate per location, those stay unified at the brand level, but each procedure page lists which locations offer the procedure. When a patient inquires from a procedure page, they're asked which branch they prefer (or geo-routed based on browser location if they consent). Local SEO benefits because each location ranks separately for its neighborhood; brand SEO benefits because the unified procedure pages accumulate authority.