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Hours and Days of Critical Care that May Be Billed
Critical care service is a time-based service provided on an hourly or fraction of an hour basis. Payment should not be restricted to a fixed number of hours, a fixed number of physicians, or a fixed number of days, on a per patient basis, for medically necessary critical care services. Time counted towards critical care services may be continuous or intermittent and aggregated in time increments (e.g., 50 minutes of continuous clock time or (5) 10 minute blocks of time spread over a given calendar date). Only one physician may bill for critical care services during any one single period of time even if more than one physician is providing care to a critically ill patient.
For Medicare Part B physician services paid under the physician fee schedule, critical care is not a service that is paid on a “shift” basis or a “per day” basis. Documentation may be requested for any claim to determine medical necessity. Examples of critical care billing that may require further review could include: claims from several physicians submitting multiple units of critical care for a single patient, and submitting claims for more than 12 hours of critical care time by a physician for one or more patients on the same given calendar date. Physicians assigned to a critical care unit (e.g., hospitalist, intensivist, etc.) may not report critical care for patients based on a ‘per shift” basis.
The CPT code 99291 is used to report the first 30 - 74 minutes of critical care on a given calendar date of service. It should only be used once per calendar date per patient by the same physician or physician group of the same specialty. CPT code 99292 is used to report additional block(s) of time, of up to 30 minutes each beyond the first 74 minutes of critical care (See table below). Critical care of less than 30 minutes total duration on a given calendar date is not reported separately using the critical care codes. This service should be reported using another appropriate E/M code such as subsequent hospital care.
Clinical Example of Correct Billing of Time:
A patient arrives in the emergency department in cardiac arrest. The emergency department physician provides 40 minutes of critical care services. A cardiologist is called to the ED and assumes responsibility for the patient, providing 35 minutes of critical care services. The patient stabilizes and is transferred to the CCU. In this instance, the ED physician provided 40 minutes of critical care services and reports only the critical care code (CPT code 99291) and not also emergency department services. The cardiologist may report the 35 minutes of critical care services (also CPT code 99291) provided in the ED. Additional critical care services by the cardiologist in the CCU may be reported on the same calendar date using 99292 or another appropriate E/M code depending on the clock time involved.
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