How to Dictate a Complete Abdominal Ultrasound: Organ Order, the CBD, and What 'Complete' Actually Means

The complete abdominal ultrasound is where dictation habits are made, because it is the first study where the report is a checklist and the checklist is the whole job. The sonographer did the hard part; your job is to say something specific about every organ, in the same order, every time — and to know which organs must appear, because that list is not stylistic. It is the billing definition of the exam.

"Complete" is a legal term, not a compliment

A complete abdominal ultrasound (CPT 76700) requires documentation of eight elements: liver, gallbladder, common bile duct, pancreas, spleen, both kidneys, aorta, and inferior vena cava. Miss one in the report — even one that was scanned — and the study is, by definition, a limited exam (76705), which is a different code and a compliance problem when billed as complete.

The practical rule: if an element could not be seen, say so and say why. "Pancreas obscured by overlying bowel gas" documents the attempt and preserves the complete exam. Silence does not. This is the one place in radiology where a sentence about what you couldn't see has a dollar value, and it is also honest reporting — the clinician deserves to know the pancreas was not actually evaluated.

The organ order

Fixed subsections, same sequence every time, so a reader hunting for the spleen finds a labeled line:

• Liver — size, echotexture, focal lesions, portal vein
• Gallbladder — stones, wall, pericholecystic fluid, sonographic Murphy
• Bile ducts — CBD measurement, intrahepatic ducts
• Pancreas — visualized portions, duct if seen
• Spleen — size
• Right kidney / Left kidney — separately, with lengths
• Aorta / IVC — caliber, patency

The numbers that belong in every report

• Liver span at the midclavicular line; up to roughly 15.5–16 cm is normal. Describe echotexture relative to the right kidney — "increased echogenicity consistent with hepatic steatosis" is a finding; "fatty liver" with no comparison is a vibe.
• Gallbladder wall ≤3 mm. A thick wall is a differential (cholecystitis, hepatitis, hypoalbuminemia, ascites), not an automatic cholecystitis call — the combination that matters is stones + wall thickening + sonographic Murphy.
• Spleen ≤12–13 cm in length. Give the number; "borderline splenomegaly" without one is uninterpretable on the follow-up exam.
• Kidneys 9–12 cm, each measured, each described independently.
• Aorta <3 cm — and if it is over 3 cm anywhere, measure the maximum outer-to-outer diameter and say where it is. An infrarenal aneurysm found incidentally on an RUQ-pain study is one of the most valuable findings this exam produces.

The CBD: the measurement everyone argues about

Measure the duct at the porta hepatis, inner wall to inner wall, anterior to the portal vein. The widely taught rules:

• Normal ≤6 mm in a patient with a gallbladder.
• Add roughly 1 mm per decade over age 60 — a 7 mm duct in an 82-year-old is not an emergency.
• Post-cholecystectomy, the duct dilates at baseline: up to 8–10 mm can be normal after the gallbladder is gone. A 9 mm duct in a post-cholecystectomy patient with normal LFTs needs a calibrated sentence ("mildly prominent, may be within post-cholecystectomy range; correlate with LFTs"), not an automatic MRCP.

The trap runs both directions. A "normal" 5 mm duct in a patient with painless jaundice does not exclude an early obstructing lesion, and a dilated duct with a reason (prior cholecystectomy, age) should not trigger the obstruction workup by reflex. The duct number means nothing without the clinical column next to it.

The vessels and the fluid everyone forgets

The aorta and IVC are required elements, but they are also the two lines most often dictated on autopilot. Give the aorta an actual measured caliber at least once in the findings, note that it tapers normally, and look at the IVC for more than a heartbeat — a filling defect extending up from a renal vein is rare, but it is the kind of finding that only gets seen by someone who looks on purpose. The portal vein deserves the same respect: patency and flow direction are two words each. Hepatopetal is normal; hepatofugal flow is portal hypertension until proven otherwise, and in a patient with a coarse, nodular liver it converts a routine steatosis report into one that changes management.

And say something about free fluid. Ascites is visible on nearly every complete abdomen that has it, it is clinically important, and it belongs in its own sentence — trace perihepatic fluid in a trauma patient and moderate ascites in a cirrhotic are different reports. If there is none, "no ascites" costs two words and answers a question somebody was going to ask.

Incidental findings: route them, don't adopt them

Ultrasound finds things it cannot finish characterizing, and the skill is knowing where each one goes:

• Simple renal cyst (anechoic, imperceptible wall, posterior enhancement): call it benign and stop. Complex renal cyst (septations, nodularity, thick wall): ultrasound cannot classify it — recommend renal-protocol CT or MRI, where the Bosniak 2019 classification applies. Do not assign a Bosniak class from grayscale ultrasound.
• Echogenic liver lesion in a low-risk patient with classic hemangioma features can be followed or dismissed per context; anything atypical gets multiphase imaging.
• Gallbladder polyps: give the size — the management thresholds are size-based, and a polyp without a measurement generates a phone call.

The phrases attendings correct

• "Unremarkable abdominal ultrasound." The exam has eight required elements; the report has eight required lines.
• "The kidneys are normal." Two organs, two lines, two lengths.
• "No sonographic evidence of..." as a reflex qualifier on everything. Use it where the modality genuinely limits you (pancreas, free air), not on the gallbladder you saw beautifully.
• "Prominent CBD" without a number, an age, or a cholecystectomy check. That one sentence launches more unnecessary MRCPs than any other in body ultrasound.
• Restating the findings as the impression. The impression answers the question: is this the gallbladder, is anything obstructed, what needs follow-up.

One more habit worth building early: when a prior abdominal ultrasound exists, compare the numbers, not just the words. A spleen that went from 11.2 to 12.8 cm in a year, or a cyst that grew a centimeter, is a finding the prior report's prose will never surface — only the measurements will.

A model report

EXAMINATION: Ultrasound abdomen, complete
HISTORY: 47-year-old female, right upper quadrant pain
after meals.
TECHNIQUE: Grayscale and color Doppler evaluation of the
abdomen.
COMPARISON: None.
FINDINGS:
Liver: 15.1 cm. Mildly increased echogenicity consistent
with steatosis. No focal lesion. Portal vein patent with
hepatopetal flow.
Gallbladder: Multiple mobile shadowing gallstones,
largest 1.4 cm. Wall 2 mm. No pericholecystic fluid.
Negative sonographic Murphy sign.
Bile ducts: CBD 4 mm. No intrahepatic ductal dilation.
Pancreas: Head and body visualized, normal; tail
obscured by bowel gas.
Spleen: 10.2 cm.
Right kidney: 10.9 cm. No hydronephrosis, stone, or mass.
Left kidney: 11.1 cm. 1.8 cm simple cortical cyst,
interpolar. No hydronephrosis.
Aorta: 1.9 cm, normal caliber. IVC: Normal.
IMPRESSION:
1. Cholelithiasis without sonographic evidence of acute
   cholecystitis. No biliary dilation.
2. Hepatic steatosis.
3. Simple left renal cyst — benign, no follow-up.

Every element is present or excused, every organ owns a number, and the impression makes the surgical question (stones, yes; cholecystitis, no) explicit. Keep a clean scaffold handy — our normal abdominal ultrasound template has all eight elements pre-structured — and the calculator library covers the follow-up systems the incidentals will route into. Or watch a complete abdomen draft itself in the live demo: dictate the positives, and the eight-element structure, with every normal line, assembles around them.