I don't know what type of coding software you use, or maybe you are using physical books. We use Optum's EncoderPro for Payers, and it has some really helpful features, like documentation tips, a layperson's description of the codes. Anyway, here is some info that may be helpful regarding 99291.
Critical care services are reported by a physician or other qualified health care provider for critically ill or injured patients. Critical illnesses or injuries are defined as those with impairment to one or more vital organ systems with an increased risk of rapid or imminent health deterioration. Critical care services require direct patient/provider involvement with highly complex decision making in order to evaluate, control, and support vital systems functions to treat one or more vital organ system failures and/or to avoid further decline of the patient's condition. Vital organ system failure includes, but is not limited to, failure of the central nervous, circulatory, or respiratory systems; kidneys; liver; shock; and other metabolic processes. Generally, critical care services necessitate the interpretation of many physiologic parameters and/or other applications of advanced technology as available in a critical care unit, pediatric intensive care unit, respiratory care unit, in an emergency facility, patient room or other hospital department; however, in emergent situations, critical care may be provided where these elements are not available. Critical care may be provided so long as the patient's condition continues to warrant the level of care according to the criteria described. These codes are time based codes, meaning the total time spent must be documented and includes direct patient care bedside or time spent on the patient's floor or unit (reviewing laboratory results or imaging studies and discussing the patient's care with medical staff, time spent with family members, caregivers, or other surrogate decision makers to gather information on the patient's medical history, reviewing the patient's condition or prognosis, and discussing various treatment options or limitations of treatment), as long as the clinician is immediately available and not providing services to any other patient during the same time period.
Time spent outside of the patient's unit or floor, including telephone calls, caregiver discussions, or time spent in actions that do not directly contribute to the patient's care rendered in the critical unit are not reported as critical care.
The following procedures are included/bundled into 99291, so the time spent on these procedures can be counted towards the critical care time, and these codes are not separately billable in addition to 99291.
Professional services for interpretation: |
Blood gases |
Chest films (71045-71046) |
Measurement cardiac output (93598) |
Other computer stored information |
Pulse oximetry (94760-94762) |
Professional services: |
Gastric intubation (43752-43753) |
Transcutaneous pacing, temporary (92953) |
Venous access, arterial puncture (36000, 36410, 36415, 36591, 36600) |
Ventilation assistance and management, includes CPAP, CNP (94002-94004, 94660, 94662) |
I don't know if this information helps you figure out if the documentation provided, or that may be provided as a result of your query to the provider, is sufficient to support billing 99291 or if you need to look at another E&M CPT code that better describes the services provided to the patient by your provider.