CPC Anesthesia Coding 1 — Questions and Answers
Question 1: Which formula is used to calculate anesthesia reimbursement?
- (Base units + Time units + Modifying units) × Conversion factor (Correct answer)
- (Time units + Modifying units) × Base rate
- (Base units × Time units) + Modifying units
- Base units + (Time units × Conversion factor)
Correct answer: (Base units + Time units + Modifying units) × Conversion factor
The standard anesthesia payment formula is (B + T + M) × CF, where B=base units, T=time units, M=modifying units, and CF=the payer's conversion factor.
Question 2: How are anesthesia time units typically calculated by most payers?
- One unit per 15 minutes of anesthesia time (Correct answer)
- One unit per 30 minutes of anesthesia time
- One unit per 10 minutes of anesthesia time
- One unit per 60 minutes of anesthesia time
Correct answer: One unit per 15 minutes of anesthesia time
Most payers, including Medicare, use one time unit per 15 minutes, counting from anesthesia induction until the patient is safely transferred to post-anesthesia care.
Question 3: What does anesthesia physical status modifier P3 indicate about the patient?
- A patient with severe systemic disease (Correct answer)
- A patient with mild systemic disease
- A moribund patient not expected to survive
- A normal healthy patient
Correct answer: A patient with severe systemic disease
P3 designates a patient with severe systemic disease that is not incapacitating, adding one modifying unit to the anesthesia calculation.
Question 4: Which CPT code range covers anesthesia services?
- 00100–01999 (Correct answer)
- 10000–19999
- 70000–79999
- 90000–99999
Correct answer: 00100–01999
Anesthesia CPT codes are found in the range 00100–01999, organized by anatomical site of the surgical procedure.
Question 5: Monitored Anesthesia Care (MAC) is best described as:
- Sedation monitoring by an anesthesiologist with ability to convert to general anesthesia if needed (Correct answer)
- General anesthesia delivered to a monitored surgical patient
- Regional anesthesia administered without continuous monitoring
- Epidural anesthesia specifically for obstetric labor procedures
Correct answer: Sedation monitoring by an anesthesiologist with ability to convert to general anesthesia if needed
MAC involves an anesthesia provider monitoring the patient and administering sedation while remaining ready and able to convert to general anesthesia if required.
Question 6: A patient classified as anesthesia physical status P5 is best described as:
- A moribund patient not expected to survive without the operation (Correct answer)
- A patient with severe incapacitating systemic disease
- A brain-dead patient being prepared for organ donation
- A patient with a mild systemic disease under control
Correct answer: A moribund patient not expected to survive without the operation
P5 designates a moribund patient who is not expected to survive without the operation, adding 3 modifying units to the anesthesia billing formula.
Question 7: Anesthesia qualifying circumstance code 99100 is reported when anesthesia is provided to:
- A patient under 1 year or over 70 years of age (Correct answer)
- A patient requiring controlled hypotension
- An emergency patient requiring immediate intervention
- A patient requiring deliberate hypothermia
Correct answer: A patient under 1 year or over 70 years of age
Code 99100 is reported for extreme age patients (under 1 year or over 70 years), reflecting the increased complexity of anesthesia for these populations.
CPC Anesthesia Coding 1
Which formula is used to calculate anesthesia reimbursement?