Probably. Like most psychological disorders, NPD is diagnosed by getting a high score on a specialized evaluation, so you could easily describe someone who gets

Probably. Like most psychological disorders, NPD is diagnosed by getting a high score on a specialized evaluation, so you could easily describe someone who gets a score that’s not quite beyond the threshold as being on the narcissism spectrum. But it doesn’t seem practical to say that an otherwise normal person who is “showing arrogant, haughty behaviors or attitudes” has a medical condition.