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ICD-10 Guide
ICD-10 CodesI67.1

I67.1

Billable

Cerebral aneurysm, nonruptured

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/06/2025

Code Description

ICD-10 I67.1 is a billable code used to indicate a diagnosis of cerebral aneurysm, nonruptured.

Key Diagnostic Point:

Cerebral aneurysm, nonruptured, refers to a localized dilation of a cerebral artery that has not yet ruptured. Clinically, patients may be asymptomatic, but some may present with symptoms such as headaches, visual disturbances, or neurological deficits depending on the aneurysm's size and location. The anatomy involved includes the major cerebral arteries, particularly the anterior communicating artery, posterior communicating artery, and the basilar artery. Disease progression can lead to complications such as rupture, which can result in subarachnoid hemorrhage, or it may remain stable over time. Diagnostic considerations include neuroimaging techniques such as CT angiography, MR angiography, or digital subtraction angiography to confirm the presence and size of the aneurysm. Regular monitoring may be recommended based on the aneurysm's characteristics and the patient's risk factors, including hypertension and family history of cerebral aneurysms.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires imaging and clinical evaluation to confirm diagnosis.
  • Treatment complexity: Management may involve observation, surgical intervention, or endovascular therapy.
  • Documentation requirements: Detailed clinical documentation is necessary to support diagnosis and treatment.
  • Coding specificity: Requires precise coding to differentiate from ruptured aneurysms and other cerebrovascular conditions.

Audit Risk Factors

  • Common coding errors: Misclassification of ruptured vs. nonruptured aneurysms.
  • Documentation gaps: Incomplete clinical notes regarding symptoms or imaging findings.
  • Billing challenges: Difficulty in justifying the need for imaging or follow-up care.

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Neurosurgery

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Related ICD-10 Codes

Related CPT Codes

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

Cerebral aneurysms, particularly nonruptured ones, have significant clinical implications as they can lead to serious complications if not monitored appropriately. The prevalence of cerebral aneurysms in the general population is estimated to be around 2-5%, with a higher incidence in women and individuals with a family history. Understanding and managing nonruptured aneurysms is crucial for reducing the risk of rupture and improving patient outcomes, thereby impacting overall population health and healthcare utilization.

ICD-9 vs ICD-10

Cerebral aneurysms, particularly nonruptured ones, have significant clinical implications as they can lead to serious complications if not monitored appropriately. The prevalence of cerebral aneurysms in the general population is estimated to be around 2-5%, with a higher incidence in women and individuals with a family history. Understanding and managing nonruptured aneurysms is crucial for reducing the risk of rupture and improving patient outcomes, thereby impacting overall population health and healthcare utilization.

Reimbursement & Billing Impact

Reimbursement may depend on the justification for imaging and follow-up care. Common denials can occur if there is insufficient documentation to support the necessity of the procedure or if the diagnosis is not clearly linked to the services provided. Best practices include ensuring that all clinical notes are thorough and that imaging results are clearly documented in the patient's medical record.

Resources

Clinical References

  • •
    ICD-10 Official Guidelines for I00-I99
  • •
    Clinical Documentation Requirements

Coding & Billing References

  • •
    ICD-10 Official Guidelines for I00-I99
  • •
    Clinical Documentation Requirements

Frequently Asked Questions

What specific conditions are covered by I67.1?

I67.1 specifically covers nonruptured cerebral aneurysms, which may be incidental findings or symptomatic. It does not include ruptured aneurysms or other vascular malformations.

When should I67.1 be used instead of related codes?

I67.1 should be used when a cerebral aneurysm is confirmed as nonruptured. It is important to differentiate it from I67.0, which is for ruptured aneurysms, and other codes that may pertain to different cerebrovascular conditions.

What documentation supports I67.1?

Documentation should include imaging reports confirming the presence of a nonruptured aneurysm, clinical notes detailing symptoms, and any relevant patient history that supports the diagnosis.