The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) describes NPD as possessing at least five of the following nine criteria. Source: Narcissistic personality disorder | Wikipedia
NPD is slated for removal from the next edition of the Diagnostic Statistical Manual (DSM-5-TR), DSM, which classifies mental disorders according to symptoms.

The framers of the DSM's conclusion was basically that the studies of narcissistic personality disorder have been severely flawed, and that the criteria are not reliable or valid. They do recognize, however, that people may have narcissistic traits. Source: Upstate Medical University


Selfishness, involving a sense of entitlement, a lack of empathy, and a need for admiration, as characterizing a personality type.
Their motivation of pursuing social status is so strong that it can overshadow other motives for behavior, such as the motive to maintain close relationships.
Source: Narcissists' behavior is driven by the pursuit of social status | Tilburg University
Narcissistic Personality Disorder | HelpGuide.org
People with narcissistic personality disorder are extremely resistant to changing their behavior, even when it's causing them problems. Their tendency is to turn the blame on to others. What's more, they are extremely sensitive and react badly to even the slightest criticisms, disagreements, or perceived slights, which they view as personal attacks. For the people in the narcissist's life, it's often easier just to go along with their demands to avoid the coldness and rages. However, by understanding more about narcissistic personality disorder, you can spot the narcissists in your life, protect yourself from their power plays, and establish healthier boundaries.

Narcissistic Personality Disorder | Book by Mitra (NYU) & Fluyau (Emory)
Given the challenges of diagnosing narcissistic personality disorder, there have been varying reports of prevalence in the United States of America( USA). Prevalence rates from community samples have been from 0.5% to 5% of the US population. However, in clinical settings, NPD appears to be more prevalent. Prevalence rates can be from 1% to 15% of the United States population. NPD may coexist with other mental disorders rendering its diagnosis challenging.

NPD Symptoms & Causes | Mayo Clinic

How to Deal With a Narcissistic Family Member | Taylor Counseling Group

Links:
Narcissistic Personality Disorder | HelpGuide.org
Narcissistic Personality Disorder DSM-5 301.81 (F60.81) | theravive
Narcissistic personality disorder WikipediaThe Why and How of Narcissism: A Process Model of Narcissistic Status Pursuit | PubMed,
Sounds like a Narcissist: Behavioral Manifestations of Narcissism in Everyday Life | PubMed

last updated 15 Jan 2023