All complicated<unk> 
Intractable nausea/vomiting
Comborbid disease
High WBC, high fever, elderly, immunocompromised
Failed outpatient therapy (worsening symptoms or CT findings within 6 weeks of initial episode)
Large abscess > 3-4cm requiring percutaneous drainage with CT or US
Patients may be treated as outpatients if:
Can tolerate PO
No significant comorbidities
Able to obtain outpatient antibiotics
Have adequate pain control
Have uncomplicated disease
Refer all newly-diagnosed patients for follow up colonoscopy in 6 weeks (CT cannot rule out carcinoma)
Surgical referral should be made for all patients with 3rd episode of<unk> 
Can tolerate PO
No significant comorbidities
Able to obtain outpatient antibiotics
Have adequate pain control
Have uncomplicated disease
Diverticulitis
Ischemic colitis
Kidney stone
Appendicitis
UTI
Appendicitis 
Pyelonephritis
Uvulitis