ICD-10 Guide

Abnormal Ultrasound

ICD-10 Coding for Abnormal Ultrasound Findings(O28.3, R93.8)

PRIMARY SPECIALTYObstetrics

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Abnormal Ultrasound?

Abnormal ultrasound findings refer to any unexpected results observed during an ultrasound examination, which may indicate various underlying conditions. Key clinical points include: 1) Abnormal findings can range from benign conditions to serious pathologies. 2) Common indications for ultrasound include monitoring fetal development, assessing organ structure, and identifying abnormalities. 3) Etiology may include genetic factors, infections, or structural anomalies. 4) Pathophysiology often involves abnormal tissue development or physiological changes. 5) Clinical presentation may vary widely based on the specific abnormality detected. Typical use cases for this diagnosis code include routine prenatal screenings where anomalies are detected, follow-up evaluations for previously identified issues, and assessments of suspected complications during pregnancy. Clinicians must interpret ultrasound results in conjunction with clinical history and other diagnostic tests to arrive at a comprehensive diagnosis.

Key Clinical Considerations:

Abnormal ultrasound findings must be confirmed through imaging studies and correlated with clinical symptoms.
Signs may include abnormal fetal heart rate patterns, unusual organ shapes, or unexpected fluid collections.
Resolution criteria depend on the specific abnormality; for example, a benign cyst may resolve spontaneously.
Imaging findings supporting diagnosis include specific measurements, echogenicity changes, and structural anomalies.

Clinical Information

Clinical Criteria & Documentation Requirements

Documentation must include detailed descriptions of ultrasound findings, clinical context, and any follow-up plans.
Compliant documentation: 'Ultrasound shows a 2 cm cyst on the right ovary.' Non-compliant: 'Ultrasound was abnormal.'
Template phrases: 'Ultrasound findings indicate [specific abnormality].' 'Patient's ultrasound results are consistent with [diagnosis].'
Medical necessity must be documented, including indications for the ultrasound and any relevant patient history.

Coding Guidelines

Usage Guidelines & Examples

Use this code when ultrasound findings indicate abnormalities such as fetal growth restriction or organ malformations.
Do not use this code for routine ultrasounds without abnormal findings or for unrelated conditions.
Correct usage: 'Abnormal ultrasound indicating fetal anomaly.' Incorrect: 'Routine ultrasound performed.'
Common errors include misclassifying normal findings as abnormal; ensure accurate interpretation of results.

Code Exclusions

Important Exclusions

Excluded conditions include normal ultrasound findings, which do not require coding under abnormal findings.
Alternative codes for normal findings include Z36 for routine antenatal screening.
Common exclusion errors involve coding normal results as abnormal; ensure clarity in documentation.
Certain conditions are excluded to maintain specificity in coding and avoid misrepresentation of patient status.

Specialty Focus

Primary Specialty

Obstetrics

Specialty Applications

This diagnosis applies to conditions such as fetal anomalies, placental abnormalities, and organ malformations.
Appropriate in clinical scenarios including routine prenatal care, high-risk pregnancy monitoring, and emergency evaluations.
Applicable in various settings including outpatient obstetric clinics, inpatient maternity wards, and emergency departments.
Specialty-specific considerations include the need for obstetricians to document findings thoroughly for prenatal care.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

Comprehensive clinical documentation
Accurate code selection based on clinical criteria
Proper exclusion considerations
Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Abnormal ultrasound findings diagnosed based on echogenicity changes.'

Template 2

Template: 'Patient presents with abnormal fetal heart rate consistent with ultrasound findings.'

Template 3

Template: 'Diagnostic criteria met: abnormal structure noted on ultrasound.'

Template 4

Template: 'Treatment plan includes further imaging and consultation for identified condition.'

Billing Information

Billing Considerations

Ensure proper documentation for billing
Verify code specificity requirements
Check for any additional codes needed
Review payer-specific guidelines

Common Issues

Insufficient clinical documentation
Incorrect code selection
Missing supporting diagnoses
Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this code?

Detailed ultrasound reports, clinical notes, and follow-up plans are required.

When should this code be used vs similar codes?

Use this code for abnormal findings; similar codes apply to specific conditions.

What are common billing issues with this code?

Reimbursement may be denied if documentation does not support medical necessity.

What procedures are commonly associated?

CPT codes for ultrasound procedures and follow-up imaging may be relevant.

What is Abnormal Ultrasound?

Key Clinical Considerations:

Abnormal ultrasound findings must be confirmed through imaging studies and correlated with clinical symptoms.
Signs may include abnormal fetal heart rate patterns, unusual organ shapes, or unexpected fluid collections.
Resolution criteria depend on the specific abnormality; for example, a benign cyst may resolve spontaneously.
Imaging findings supporting diagnosis include specific measurements, echogenicity changes, and structural anomalies.

Abnormal Ultrasound

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Template 1

Template 2

Template 3

Template 4

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

What documentation is required for this code?

When should this code be used vs similar codes?

What are common billing issues with this code?

What procedures are commonly associated?

Abnormal Ultrasound

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Template 1

Template 2

Template 3

Template 4

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

What documentation is required for this code?

When should this code be used vs similar codes?

What are common billing issues with this code?

What procedures are commonly associated?