An outpatient hospital procedure required substantially greater time and intensity than usual because of unusual patient anatomy, and the operative report details the additional work. Which modifier concept may apply?

The increased procedural services modifier concept is reserved for situations in which the work required is substantially greater than typically required for the listed procedure. Operative documentation must specifically describe the unusual factors and additional work. Difficulty alone, without substantiating detail, does not justify the modifier, nor do reduced-service or discontinued-procedure modifiers address increased intensity.