ICD-10 Code F05 is designated for delirium, not induced by alcohol and other psychoactive substances. Delirium is a serious disturbance in mental abilities that results in confused thinking and reduced awareness of the environment. It's crucial to note that this code should be used when delirium is not directly caused by substances such as alcohol or drugs.

When you are documenting or billing for services related to a patient diagnosed with delirium (not substance-induced), F05 is the specific code that should be used to ensure that insurance claims are accurately processed and that you are appropriately reimbursed for your services.

Here's how to use this code:

1. Diagnosis entry 

When creating a diagnosis for a patient, ensure that you enter F05 as the primary diagnosis code if delirium is the main focus of your treatment.

2. Billing and insurance claims

When preparing billing documents or insurance claims for sessions related to the treatment of delirium, F05 should be included as the diagnosis code. This is crucial for claims acceptance by insurance companies. 

3. Documentation

In your session notes and any other relevant documentation, it's important to reference the diagnosis code F05 when discussing assessments, treatment plans, and progress notes related to delirium. This not only ensures continuity and clarity but also supports the diagnosis code used for billing and insurance purposes.

4. Insurance verification

Before submitting claims, verify with the patient's insurance provider that delirium (ICD-10 code F05) is covered under their policy. This can prevent potential denials and delays in reimbursement. 

5. Stay informed

Coding standards and insurance policies may change. Regularly update your knowledge on coding practices, especially for mental health diagnoses, to ensure compliance and accuracy in your billing processes.