Summary & Overview

CPT 23920: Forequarter Amputation Through Shoulder

CPT code 23920 denotes a forequarter amputation: surgical removal of the entire upper extremity through the shoulder joint, including the humerus and separation from the scapula and clavicle without bone incision. This is an uncommon but high-acuity major surgical procedure that has significant clinical, functional, and cost implications for patients and payers nationwide. The code is used to document and bill for definitive oncologic, traumatic, or severe infectious indications requiring complete arm removal at the shoulder.

Key payers referenced in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context and typical sites of service, plus national-level benchmarks and utilization patterns where available. Policy and coding notes highlight documentation elements and payer considerations relevant to coverage and claims adjudication. The publication also outlines common modifier usage and related coding topics when data are available. Where input data are missing, the text notes "Data not available in the input." The goal is to provide clinicians, billing professionals, and policy analysts with a clear operational and coding reference for CPT code 23920.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 23920upper extremity amputationforequarter amputationsurgical proceduresorthopedic surgeryinpatient surgerybilling and codingmajor limb amputationoperating room services

Billing Code Overview

CPT code 23920 describes the surgical removal of the entire upper extremity through the shoulder joint. The procedure involves removal of the humerus and the entire arm from the scapula and clavicle without incising the bones.

Service type: Major surgical amputation of the upper extremity through the shoulder (forequarter amputation)
Typical site of service: Inpatient operating room or inpatient surgical suite in an acute care hospital

Clinical & Coding Specifications

Clinical Context

A typical patient is an adult with a nonfunctional, severely damaged, infected, or malignant upper limb requiring surgical removal through the shoulder girdle (forequarter amputation). The patient often presents after high-energy trauma with irreparable neurovascular injury, uncontrolled soft-tissue infection/osteomyelitis, or locally advanced malignancy involving the shoulder girdle (e.g., soft-tissue sarcoma or recurrent osteosarcoma) where limb-sparing surgery is not possible. Preoperative workflow includes multidisciplinary evaluation (orthopedic oncologist or trauma/vascular surgeon, medical oncology or infectious disease as appropriate), imaging (radiographs, CT, MRI), vascular assessment, informed consent addressing prosthetic rehabilitation and pain control, and perioperative planning for blood management and potential flap coverage. Typical intraoperative steps include general endotracheal anesthesia, vascular control, soft-tissue and neurovascular division at the shoulder girdle, resection of the humerus and anatomic shoulder elements without separate osteotomy of the scapula or clavicle, hemostasis, and layered closure or flap reconstruction as indicated. Postoperative care includes pain control, infection surveillance, physical and occupational therapy planning for prosthesis and functional adaptation, and coordination with rehabilitation services and prosthetics providers.

Coding Specifications

Modifier	Description	When to Use
`50`	Bilateral Procedure	Use if procedure is performed on both upper extremities (rare for this code).

Taxonomy Code	Specialty	Notes
207X00000X	Orthopaedic Surgery	Orthopedic oncologists or trauma surgeons commonly perform forequarter amputations.
2080P0004X	General Surgery	Trauma or vascular surgeons may perform amputations in acute settings.
2084P0800X	Surgical Oncology	Surgical oncologists perform resections for malignancy requiring limb amputation.
163W00000X	Physical Medicine & Rehabilitation	PM&R coordinates postoperative rehabilitation and prosthetic planning.
207ZH0000X	Vascular Surgery	Vascular surgeons may be involved when major arterial reconstruction or control is required.

CPT Code	Description	Relationship to This Procedure
`11042`	Debridement; skin, subcutaneous tissue, muscle and fascia when performed (first 30 sq cm or less)	May be used when extensive soft-tissue debridement is required before or during amputation for infection or necrosis.
`19318`	Partial or total mastectomy for non-breast indications (includes resection of chest wall soft tissue)	May be used if chest wall resection is required for oncologic clearance adjacent to the shoulder girdle.
`38220`	Bone marrow or other tissue harvest for transplant (not typically related)	Data not available in the input.
`20926`	Soft tissue allograft (e.g., fascia, tendon)	May be used for reconstruction or coverage in complex shoulder girdle resections when grafting is required.
`64999`	Unlisted procedure, nervous system	May be reported for neural procedures not otherwise classified when complex nerve management is performed during amputation.

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