The name was changed to "San Pablo City National High School."

In the 1990s, SPCNHS added annexes in different barangays of the city due to the unprecedented increase of enrollees that could no longer be accommodated in the school campus.

With the introduction of Republic Act 10533 or the Enhanced Basic Education Act of 2013,[2] SPCNHS was primed to be one of the implementers of the Senior High School Program, along with the already existing Junior High School Program.

Upon the approval of the program, it was henceforth named "San Pablo City Integrated High School" (SPCIHS).

In addition, administrative, finance, and other support staff are headed by a secondary school principal.