HCPCS Code S9123: Nursing Care, In the Home; By Registered Nurse, Per Hour

## **S9123 documentation requirements** The documentation requirements for HCPCS code S9123 generally include detailed nurse progress notes and medication administration records to support the services billed. Additional documentation may also be requested, such as seizure logs or ventilator logs, particularly for private duty nursing (PDN) services, which require demonstration of medical necessity and ongoing clinical justification. Providers must maintain records that specify the date and duration of home nursing care, the specific skilled nursing services provided, and the professional qualifications of the registered nurse RN delivering the care. Documentation should also align with the patient's condition, treatment plan, and treating physician's orders. This documentation may be subject to review during initial authorization, recertification, or revisions to care plans. In home health settings, documentation needs to include start and end times of each nursing visit, name and title of the nurse, and detailed descriptions of care in the home to ensure compliance and support billing of each hour of nursing care under code S9123. This supports payer requirements and proper coding standards, helping mitigate the risk of hospital-acquired complications.

## **S9123 billing requirements** The billing requirements for HCPCS code S9123, which covers nursing care in the home by a registered nurse (RN) per hour, include the following key points: - **Unit definition**: One unit equals one hour of nursing care. Providers can bill up to 24 units per day (24 hours) for this code. An hour use for general nursing may be applicable when broken into partial increments, and 99602 can be used for outpatient clinic visits or infusion-related care. - **Authorization**: Billing must align with the authorized hours of care stipulated in the patient's care plan or approval letter. Unapproved or excess hours beyond authorization may be denied reimbursement. - **Documentation**: Detailed records must support the billed hours, including nurse per hour use, date, duration, monitor health status, administer tasks, health status administer medications, service description, nurse credentials, and alignment with physician orders. This supports medical needs, necessity, and proper coding. - **Service type**: S9123 is specifically for general nursing care by an RN at home and should not be used if CPT codes 99500 to 99602 apply. - **Billing forms**: Professional claims use HCPCS or CPT codes reflecting services provided. Facility billing involves appropriate revenue codes combined with S9123 on UB-04 forms with relevant types of bill (e.g., 032x for home health under a treatment plan). - **Prior authorization**: Many payers require authorization before billing S9123 to ensure compliance with medical policies and guidelines and to avoid denied claims. Following these billing procedures ensures accuracy, supports coverage under related policies from health insurers, and maintains compliance with coding standards.

## **Other relevant codes** Other relevant HCPCS codes related to S9123, which covers nursing care in the home by a registered nurse (RN) per hour, include: - **S9122**: Home health aide or certified nurse assistant providing care in the home, per hour. - **S9124**: Nursing care in the home by a licensed practical nurse (LPN) per hour. - **T1002**: RN services by 15-minute increments. - **T1003**: LPN/LVN services by 15-minute increments. - **G0162**: Skilled services by RN for management and evaluation of the plan of care, each 15 minutes. - **S9127**: Social work visits in the home, per diem. Codes for home infusion therapy (e.g., S5497, S5501), respiratory therapy, and home management of specific conditions (e.g., S9208 for preterm labor, S9213 for preeclampsia) that include nursing and other professional services administered in the home.