CAC Study Guide 2026

Everything you need to pass the CAC exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.

📋 CAC Exam Format at a Glance

Questions

90 min

Time Limit

70.00%

Passing Score

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📚 CAC Topics to Study (18)

HCPCS Ambulance Service Codes, Transport Levels, and Origin/Destination Modifiers · 7 cards HCPCS Ambulance Service Codes, Transport Levels, and Origin/Destination Modifiers · 7 cards HCPCS Ambulance Service Codes, Transport Levels, and Origin/Destination Modifiers · 7 cards Ambulance Coding and Documentation Compliance · 6 cards Ambulance Coding and Documentation Compliance · 6 cards CAC ICD-10 Diagnosis Coding for Ambulance Services · 6 cards CAC ICD-10 Diagnosis Coding for Ambulance Services · 6 cards CAC ICD-10 Diagnosis Coding for Ambulance Services · 6 cards CAC Medicare Coverage and Medical Necessity for Ambulance Transport · 6 cards CAC Medicare Coverage and Medical Necessity for Ambulance Transport · 6 cards CAC Medicare Coverage and Medical Necessity for Ambulance Transport · 6 cards Legal and Ethical Considerations in Ambulance Billing · 6 cards Legal and Ethical Considerations in Ambulance Billing · 6 cards Medical Billing and Reimbursement for Ambulance Services · 6 cards Medical Billing and Reimbursement for Ambulance Services · 6 cards Modifiers and Special Coding Considerations for Ambulance Claims · 6 cards Modifiers and Special Coding Considerations for Ambulance Claims · 6 cards Professional Ethics & Standards · 6 cards

✍️ Sample CAC Questions & Answers

1. When a patient is transported after a syncopal episode with no identified cause, which ICD-10-CM code applies?

✓ R55

R55 (Syncope and collapse) is the correct code when a patient faints and no underlying cause has been established at the time of transport.

2. A new regulation impacts legal and ethical considerations in ambulance billing procedures. What should a CAC professional do first?

✓ Ensuring compliance with current regulatory requirements and standards

Ensuring compliance with current regulatory requirements and standards is the correct approach because effective legal and ethical considerations in ambulance billing in the ambulance coder field requires adherence to professional standards, evidence-based practices, and systematic methodology. This approach ensures consistent, high-quality outcomes while maintaining professional accountability.

3. In ambulance billing, which origin/destination modifier code represents a patient's home (residence)?

✓ R

The modifier 'R' designates the patient's residence as the origin or destination of the ambulance transport.

4. Which scenario qualifies as an ALS assessment for ambulance billing purposes even when no ALS intervention is performed?

✓ A paramedic performing a medical assessment that determines ALS care is not needed

An ALS assessment by a paramedic qualifies as ALS1 even if no ALS intervention is ultimately performed, as long as the assessment itself required ALS-level training.

5. What is the significance of the condition code 'QL' on a Medicare ambulance claim?

✓ Patient is pronounced dead after ambulance is called

Condition code QL indicates the patient was pronounced dead after the ambulance was en route, which affects how the claim is processed and reimbursed.

6. Which federal program oversees Medicare ambulance supplier enrollment and assigns the National Provider Identifier (NPI)?

✓ CMS (Centers for Medicare & Medicaid Services)

CMS administers Medicare enrollment for ambulance suppliers through the PECOS system and the NPI is assigned through the National Plan and Provider Enumeration System (NPPES).

🎯 Free CAC Practice Tests

HCPCS Ambulance Service Codes, Transport Levels, and Origin/Destination Modifiers · 7 questions HCPCS Ambulance Service Codes, Transport Levels, and Origin/Destination Modifiers · 7 questions HCPCS Ambulance Service Codes, Transport Levels, and Origin/Destination Modifiers · 7 questions Modifiers and Special Coding Considerations for Ambulance Claims · 6 questions Professional Ethics & Standards · 6 questions CAC ICD-10 Diagnosis Coding for Ambulance Services · 6 questions CAC ICD-10 Diagnosis Coding for Ambulance Services · 6 questions CAC ICD-10 Diagnosis Coding for Ambulance Services · 6 questions CAC Medicare Coverage and Medical Necessity for Ambulance Transport · 6 questions Ambulance Coding and Documentation Compliance · 6 questions

📖 CAC Guides & Articles

Your CAC Study Path

1. Learn with Flashcards → 2. Drill Practice Tests → 3. Take the Full Exam Simulation

🃏 Flashcards (111)🏆 Exam Simulation