The report by the inspector general found that between 2012 and 2016, officers in only six of the department’s 77 precincts received what was supposed to be mandatory training on the revisions. Training was also given to new recruits and officers who were promoted over the same period.

Part of the problem, the report said, is that just four people — a liaison to the police commissioner and three officers who make up the Lesbian, Gay, Bisexual and Transgender Outreach unit — are responsible for training most of the city’s 36,000 uniformed officers on gender identity and sexual orientation. The report noted that the Metropolitan Police Department in Washington, D.C., had five people assigned to its Lesbian, Gay, Bisexual and Transgender Liaison Unit and 57 affiliate officers across the city. New York City has nine police officers for every one in Washington.

While the department’s Internal Affairs Bureau tracks accusations of police profiling based on gender identity or sexual orientation, and officers’ use of related offensive language, the report says those categories do not capture the full range of biased police conduct. That hampers officials’ ability to spot areas of concern that may require training or discipline to reduce discrimination, according to the report.

The report noted that the Police Department had not substantiated an accusation of profiling since the category was created in 2014. The offensive language category was created in January.

Among its recommendations, the report suggested that the Police Department expedite training by using web-based classes and track attendance and completion. It also recommended updating official forms to direct the use of preferred names and revising the tracking system to capture a broader range of complaints related to the lesbian, gay, bisexual, transgender and queer communities.