How to Bill CPT 99291 for Emergency Department and Critical Care Services

When to Use CPT Code 99291

CPT 99291 is used for emergency department, critical care, or ED-related diagnostic and treatment services.

• •Service type: Emergency care
• •Setting: Emergency department
• •Billing basis: Medical decision making, time, or procedure performed

Common scenarios:

• •Emergency department evaluation and treatment
• •Life-threatening or acute conditions
• •Diagnostic testing and therapeutic interventions

Insurance Verification Tips for CPT 99291

1. •Confirm ED vs critical care requirements.
2. •Track time carefully for critical care codes.
3. •Verify bundling rules with E/M services.
4. •Ensure documentation reflects acuity and urgency.

Example Case of CPT 99291

A provider evaluates and treats a patient presenting to the emergency department with acute symptoms.
The service is documented and billed as one unit of CPT 99291.