ICDxICD-10 Medical Coding

ICDxICD-10 Medical Coding

ICD 10 Codes Diagnoses

ICD 10 Codes Diagnoses

ICDxICD-10 Medical Coding

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v1.0.0

ICD-10 Guide

DiagnosesDilation Ascending Aorta

Dilation Ascending Aorta

ICD-10 Coding for Dilation of Ascending Aorta(I71.21, I77.810)

PRIMARY SPECIALTYCardiology

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Dilation Ascending Aorta?

Essential facts and insights about Dilation of Ascending Aorta

Clinical Information

Coding Guidelines

Usage Guidelines & Examples

Related ICD-10 Codes

Ancillary Codes

I16.0

I71.21

if hypertensive urgency is present.

Z98.89

I77.810

for post-procedural dilation.

Differential Codes

I77.810

I77.810

for dilation without meeting aneurysm criteria (diameter <1.5x normal).

I71.21

I71.21

if the dilation meets aneurysm criteria.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Cardiology

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

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