What is the ICD-10 code for autoimmune encephalopathy?

The ICD-10 code for autoimmune encephalopathy is G04.81, which covers other encephalitis and encephalomyelitis, including autoimmune types.

How is autoimmune encephalopathy diagnosed?

Autoimmune encephalopathy is diagnosed through clinical evaluation, MRI, CSF analysis, and autoantibody testing, confirming autoimmune etiology.

ICD-10 Coding for Autoimmune Encephalopathy(G04.81, A85.8, G04.89)

Save

Comprehensive guide to ICD-10 coding for autoimmune encephalopathy, including documentation requirements, coding pitfalls, and billing considerations.

Also known as:

Autoimmune EncephalitisLimbic Encephalitis

Related ICD-10 Code Ranges

Complete code families applicable to Autoimmune Encephalopathy

G00-G99Primary Range

Diseases of the nervous system

→

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

Code	Description	When to Use	Key Documentation
G04.81	Other encephalitis and encephalomyelitis	Use when autoimmune etiology is confirmed by clinical, imaging, or laboratory findings.	Subacute onset of memory deficits or altered mental status CSF pleocytosis MRI showing T2-FLAIR hyperintensities + 1 more
G93.40	Encephalopathy, unspecified	Use when encephalopathy is present but the specific cause is not identified.	Altered mental status without specific etiology

Primary ICD-10-CM Codes

Other encephalitis and encephalomyelitis

G04.81Billable

Differential Codes

Alternative codes to consider when ruling out similar conditions

Encephalopathy, unspecifiedG93.40

Use when the specific cause of encephalopathy is not determined.

Other encephalitis and encephalomyelitisG04.81

Use when autoimmune etiology is confirmed.

Documentation & Coding Risks

Avoid these common issues when documenting Autoimmune Encephalopathy.

Vague documentation of encephalopathy without specifying type or cause.

Impact

Clinical: Leads to misdiagnosis and inappropriate treatment., Regulatory: Increases risk of audit and compliance issues., Financial: May result in denied claims or lower reimbursement.

Mitigation

Ensure thorough documentation of clinical findings., Use specific codes when possible.

Using G93.40 when autoimmune etiology is suspected but not confirmed.

Impact

Reimbursement: May result in lower reimbursement., Compliance: Could lead to compliance issues during audits., Data Quality: Reduces specificity and accuracy of clinical data.

Mitigation

Use G04.81 if clinical and diagnostic criteria suggest autoimmune encephalitis.

Specificity of Diagnosis

Impact

Using unspecified codes when specific diagnosis is possible.

Mitigation

Ensure documentation supports specific autoimmune diagnosis.

Frequently Asked Questions

Documentation requirements, coding pitfalls and FAQs for conditions coded with G04.81.

Primary Code

G04.81

Other encephalitis and encephalomyelitis

Quick Navigation

ICD-10 codes7

Coding risks3

FAQs2

ICD-10 Coding for Autoimmune Encephalopathy(G04.81, A85.8, G04.89)

Documentation & Coding Risks

Frequently Asked Questions

What is the ICD-10 code for autoimmune encephalopathy?

How is autoimmune encephalopathy diagnosed?

Related condition guides