CPT Code 76705: Limited abdominal ultrasound

What is CPT code 76705?

CPT code 76705 refers to a limited abdominal ultrasound, a non-invasive procedure used to assess specific abdominal organs or areas rather than conducting a full abdominal scan. This exam captures precise imaging to evaluate one or a few structures—commonly the gallbladder, liver, kidneys, common bile duct, or abdominal aorta—and is typically ordered to gather detailed images and investigate localized symptoms like upper quadrant pain, suspected masses, or follow-up of previously detected abnormalities.

Unlike a complete abdomen ultrasound (CPT 76700), which requires imaging of all major abdominal organs, CPT 76705 is used when a comprehensive evaluation is not necessary or clinically indicated. It allows healthcare providers to quickly assess specific medical conditions while optimising scheduling efficiency and practice expense management.

Documentation requirements

Proper documentation is critical for ensuring that CPT 76705 is billed compliantly and supported by medical necessity. Providers must indicate that a limited ultrasound exam was appropriate based on the clinical context.

Clinical indication

The patient’s symptoms or condition must justify the limited nature of the ultrasound examination. Common indications include right upper quadrant pain, abnormal liver function tests, suspected gallstones, or follow-up of known cysts or lesions.

Anatomical focus

The documentation must clearly state which specific organ(s) or area(s) were evaluated during the ultrasound exam, such as the abdominal aorta, common bile duct, or renal structures, and distinguish it from a complete abdominal scan.

Image documentation and report

Permanent image documentation must be retained in the medical record, along with a written interpretation and report. The radiologist or interpreting provider must describe the findings, impressions, and recommended follow-up actions.

Time and scope of the exam

While scan time with image documentation may vary, the record should reflect the focused scope of the exam and not suggest a comprehensive or unrelated evaluation.

Billing guidelines

Following coding standards and understanding payer-specific policies are essential to ensuring accurate billing and appropriate reimbursement for CPT 76705.

Distinguish from complete ultrasound (76700)

Do not use CPT 76705 when a full abdominal ultrasound was performed. If multiple abdominal organs are imaged, even in separate sessions on the same date, consider whether CPT 76700 is more appropriate.

One unit per session

As long as the scope remains limited, report one unit per limited abdominal ultrasound exam, regardless of the number of images captured or organs examined.

Modality bundling and follow-up scans

If follow-up imaging or a repeat limited ultrasound is performed, documentation must justify the need and distinguish it from the initial scan. Use modifiers if payers require, and verify whether repeat imaging on the same day is billable.

Medicare and commercial payer coverage

Most payers, including Medicare, cover CPT 76705 when it meets medical necessity criteria. Proper documentation supports clean claims, reduces denials, and improves revenue cycle management for imaging services.

Other relevant codes

• 76700 – Complete abdominal ultrasound
• 76770 – Retroperitoneal ultrasound, complete
• 76775 – Retroperitoneal ultrasound, limited