- since it was tracked in by a tenant, and therefore not the landlord's responsibility - I reported him to 311. He then agreed to take the price of the extermination out of my rent.

Side note: when the exterminator arrived at my apartment to do the assessment, he informed me that he had been in my building before. He found bed bugs in another apartment (coincidentally, the one above mine) but never treated for them. The tenant that had been living there had since moved out. The landlord, by his own admission, was made aware of the bugs at that time.