when did patient 99135 have a last procedure during their first hospital visit?
select procedures_icd.charttime from procedures_icd where procedures_icd.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 99135 and admissions.dischtime is not null order by admissions.admittime asc limit 1 ) order by procedures_icd.charttime desc limit 1