Diagnosis codes Surgical codes
Search strategy number 1 DH440 (purulent endophthalmitis)  
DH441 (other kind of endophthalmitis)
DH451 (endophthalmitis with a disease classified elsewhere)
DH598B (postoperative endophthalmitis)
Search strategy number 2 A KCKD65 (vitrectomy through pars plana or pars plicata) procedure ≤ 120 days after a KCJE20 procedure
Search strategy number 3               DH20 (inflammation in the iris or ciliary body) In combination with any of the following:
DH200 (acute or subacuteiridocyclitis) KCKA10 (vitreous biopsy)
DH201 (chronic iridocyclitis) KCKD05 (puncture of the vitreous with injection of medicine)
DH202 (iridocyclitislentica) KCKD65 (vitrectomy through pars plana or pars plicata)
DH208 (other kind of iridocyclitis) KTCK20 (needle biopsy of the vitreous)
DH209 (iridocyclitis without any specification) KCWC00 (reoperation due to a profound infection after an operation on an eye or eye surroundings)
DH30 (inflammation in the choroid or retina)          
DH300 (focal chorioretinis)
DH301 (disseminated chorioretinis)
DH302 (posterior cyclitis)
DH308 (other kind of chorioretinis)
DH309 (chorioretinis without any specification)
DT814X (other postoperative infection)
DT857 (infection or inflammation of any other internal prosthesis, implant or transplant)
DT899 (nosocomial infection)
Search strategy number 4 Z961 (a condition with an intraocular lens) In combination with any of the following:
KCKD60 (anterior vitrectomy)
KCKD65
Table 1: Search strategies for the identification of PE cases in the NPR.