Pelvic Ultrasound (limited)

What it is

The word that matters in this code is "limited." A complete pelvic ultrasound works through the whole set of organs in the lower abdomen and records a standard series of measurements. A limited study answers one question and stops. That question is usually narrow and already framed by the doctor who ordered it: has this ovarian cyst changed since last time, is the intrauterine device sitting where it should be, how much urine is left in the bladder after emptying, is there free fluid where there should not be. The machine, the gel and the probe are the same as in a complete study — sound waves are sent into the body and the returning echoes are assembled into a live picture on a screen. What differs is how much of the pelvis gets documented and how long it takes.

Why it is done

• To re-check something already known about — a cyst, a fibroid, a thickened lining — without repeating the full examination each time
• To confirm the position of an intrauterine device
• To measure residual urine in the bladder after voiding
• To answer a single urgent question, such as whether fluid has collected in the pelvis
• To follow ovarian response during fertility treatment, where the same measurement is repeated over several days

What to expect

There are two ways the probe can be used, and which one is chosen depends on what needs to be seen. From the outside, the probe is moved across the lower abdomen with gel; a full bladder helps push the bowel out of the way, so patients are often asked to drink water beforehand and not empty the bladder until told to. From the inside, a narrower probe is placed in the vagina, which sits closer to the uterus and ovaries and gives a sharper view — this one is done with the bladder empty. Either way nothing is injected, no radiation is involved, and the appointment is generally shorter than a complete study. A radiologist reads the images afterward rather than the sonographer giving an answer in the room.

Questions worth asking

• Is this being billed as limited or as a complete pelvic ultrasound? Those are different codes at different prices, and which one applies depends on how much is documented, not on how long you were in the room.
• If both an abdominal and a transvaginal approach are used in the same visit, is that one charge or two?
• Will there be a separate charge for the radiologist's reading on top of the charge for performing the scan?
• If this is a repeat check of something already known, ask whether the price differs between the hospital department and a freestanding imaging center — a short study is often where that gap is proportionally largest.