Summary & Overview
CPT 23491: Proximal Humerus Fixation with Internal Implants
CPT code 23491 represents surgical fixation of defects at the proximal humerus using internal implants such as nails, plates, or screws, with optional use of methylmethacrylate bone cement for added stability. This code captures a technically complex orthopedic procedure aimed at restoring structural integrity and preventing further functional decline or complications. Nationally, the code is relevant across acute care hospitals and ambulatory surgical centers where upper extremity reconstructive procedures are performed.
Key payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, expected settings of care, and the common payer landscape. The publication summarizes benchmarking approaches for utilization and reimbursement patterns, highlights notable payer policy considerations affecting coverage and prior authorization, and provides coding nuances that affect billing and claims adjudication.
This resource is intended to help billing managers, revenue cycle staff, and clinical leaders understand how CPT code 23491 is used in practice, what to expect from major payers, and where to look for policy updates or coding clarifications.
Billing Code Overview
CPT code 23491 describes surgical fixation of a defect at the proximal humerus (upper end of the humerus) using internal fixation implants such as nails, plates, or screws. The procedure may include the use of methylmethacrylate bone cement for additional stability when indicated.
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Service type: Operative orthopedic procedure for fixation of humeral defects
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Typical site of service: Hospital operating room or ambulatory surgical center (inpatient or outpatient surgical setting depending on patient condition and complexity)
Data not available in the input for associated taxonomies, specific ICD-10 diagnoses, or related codes.
Clinical & Coding Specifications
Clinical Context
A 68-year-old ambulatory patient presents after a fall onto the outstretched arm with severe proximal humerus pain, localized swelling, and limited shoulder range of motion. Imaging (plain radiographs and CT as needed) demonstrates a displaced proximal humeral fracture with cortical bone loss and an unstable articular segment. The orthopedic trauma surgeon schedules operative fixation using plates, screws, intramedullary nails, or a combination to restore anatomy and stability; polymethylmethacrylate bone cement may be used when there is significant metaphyseal void or poor bone quality. The typical workflow includes preoperative assessment and optimization, informed consent, perioperative regional or general anesthesia, operative fixation with intraoperative fluoroscopic imaging, wound closure, postoperative radiographs, and short-term inpatient or outpatient recovery with a tailored rehabilitation plan. Typical site of service is an ambulatory surgical center or hospital operating room. Service type is operative orthopedic fracture fixation of the proximal humerus using internal fixation implants.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Not a standard CMS modifier; reserved/implementation-specific | Use only if payer accepts for administrative reporting per payer guidance |
11 |