CPT 99221: Initial Inpatient Consultation - Documentation Requirements
CPT 99221 reports an initial inpatient consultation requiring three key components:
| Component | Requirement |
|---|
| History | Detailed (HPI ≥4 elements or 3 chronic diseases; ROS 2–9 systems; PFSH 1 pertinent) |
| Examination | Detailed (2–7 organ systems/body areas with detail) |
| Medical Decision Making (MDM) | Low complexity (2+ self-limited/minor problems; limited data; low risk) |
Critical Rules
- Consultation vs. Transfer of Care: Request from another physician/appropriate source + opinion/report back. Not for primary management.
- Time-based billing (2023+): 99221 = 40–54 min total time on date of encounter. If time-based, document total time and counseling/coordination activities.
- Inpatient only: Use 99241–99245 for office/outpatient consults.
- Modifier 25 not needed for consultation codes.
Typical Clinical Scenarios
- Cardiology consult for new AFib in hospitalized patient
- Nephrology consult for AKI with straightforward etiology
- ID consult for uncomplicated cellulitis
Documentation Checklist
- Requesting provider name, reason for consult
- Detailed HPI, ROS, PFSH
- Detailed exam pertinent to consult question
- MDM: diagnoses, data reviewed, risk assessment
- Written report to requestor
Accurate component documentation or time statement supports 99221.
