Urine pregnancy
Wet mount
Endocervical swab (for GC, Chlamydia)
CBC
ESR/CRP
Urine culture, analysis (to exclude UTI)
Pelvic ultrasound
Ultrasound sensitivity may be as low as 56% and specificity of 85% 
Consider CT to rule-out other causes of lower abdominal/pelvic pain
Multiple intra-abdominal processes can cause cervical motion tenderness, including appendicitis
Ultrasound sensitivity may be as low as 56% and specificity of 85% 
Multiple intra-abdominal processes can cause cervical motion tenderness, including appendicitis
Due to inability to test for all causative pathogens and the potential for serious complications such as infertility, the CDC has made this a purposefully vague condition with a low threshold for empiric treatment
Woman at risk for STIs
Pelvic or lower abdominal pain
No cause for the illness other than<unk>  can be identified
At least one of the following on pelvic exam:
CMT
Uterine tenderness
Adnexal tenderness.
Additional criteria that make the diagnosis more likely:
Oral temperature >101° F (>38.3° C)
Abnormal cervical or vaginal mucopurulent discharge
Presence of abundant numbers of WBC on saline microscopy of vaginal fluid
Elevated ESR
Elevated CRP
Laboratory documentation of cervical infection with GC or chlamydia
CMT
Uterine tenderness
Adnexal tenderness.
Oral temperature >101° F (>38.3° C)
Abnormal cervical or vaginal mucopurulent discharge
Presence of abundant numbers of WBC on saline microscopy of vaginal fluid
Elevated ESR
Elevated CRP
Laboratory documentation of cervical infection with GC or chlamydia
Pelvic inflammatory disease
Pelvic origin
Cervicitis
Acute cystitis
Prostatitis
Ectopic
Ovarian torsion
Epididymitis