Anesthesia base units, time and physical status modifiers, radiology professional versus technical components, and laboratory panels and pathology codes.
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- What does an anesthesia base unit value represent?
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The relative difficulty and complexity of the anesthesia service for a given procedure.- When does anesthesia time begin for coding purposes?
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When the anesthesiologist begins preparing the patient for anesthesia induction.- When does anesthesia time end for coding purposes?
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When the anesthesiologist is no longer in personal attendance and the patient is safely placed under postoperative care.- Under Medicare, how many minutes equal one anesthesia time unit?
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15 minutes.- What three components are added together to calculate total anesthesia units billed?
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Base units, time units, and modifier units (when applicable).- What CPT code range is used for anesthesia services?
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00100-01999.- What reference publication assigns the base unit value to each anesthesia CPT code?
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The Relative Value Guide (RVG) published by the American Society of Anesthesiologists.- Do anesthesia base units change if the procedure takes longer than usual?
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No, base units are fixed per procedure; extra time is billed separately as time units.- What must be documented in the anesthesia record to support the time units billed?
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The start and stop times of anesthesia care.- Which CPT code is reported when a performed anesthesia service has no specific listed anesthesia code?
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01999, the unlisted anesthesia procedure code.- What does physical status modifier P1 describe?
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A normal healthy patient.- What does physical status modifier P2 describe?
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A patient with mild systemic disease.- What does physical status modifier P3 describe?
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A patient with severe systemic disease.- What does physical status modifier P4 describe?
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A patient with severe systemic disease that is a constant threat to life.- What does physical status modifier P5 describe?
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A moribund patient who is not expected to survive without the operation.
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