No. Article 15's are Non-Judicial Punishment, punishment being the opposite of non-punitive. Article 15's for officers are as rare as green diamonds in today's Navy where it's promote or jettison. Officers are always offered the chance to resign before accepting NJP.
This is just a letter of caution, which falls below a letter of reprimand/admonition. It's like a memo from your boss to reduce your desk clutter.
Excellent annalogy.
Back in my day (man! am I gettin old, or what!) I tried my best not even to get one of those.