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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.

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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

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CPT 23920: Forequarter Amputation Through Shoulder

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Billing Code Overview

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).
`62`	Two Surgeons	Use when two surgeons work together as primary surgeon and co-surgeon due to complexity.
`80`	Assistant Surgeon	Use when an assistant surgeon is documented and meets payer criteria.
`81`	Minimum Assistant Surgeon	Use when a minimal assistant surgeon role is documented.
`82`	Assistant Surgeon (When Qualified Resident Not Available)	Use when a qualified resident is not available and an assistant is required.
`22`	Increased Procedural Services	Use when documentation supports substantially greater work than typical for this procedure.
`52`	Reduced Services	Use when the procedure is partially reduced or not completed as described.
`53`	Discontinued Procedure	Use when the procedure was started but discontinued due to extenuating circumstances.
`26`	Professional Component	Use when reporting only the professional component of a service (rare for operative codes).
`78`	Unplanned Return to OR Following Initial Procedure for a Related Procedure	Use for immediate postoperative return to the operating room for a related procedure.
`79`	Unrelated Procedure or Service by the Same Physician During the Postoperative Period	(Not in provided list) Data not available in the input.
`LT`	Left Side	Use to identify the left upper extremity when laterality is required by the payer.
`RT`	Right Side	Use to identify the right upper extremity when laterality is required by the payer.

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.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
Data not available in the input.	Data not available in the input.	Data not available in the input.

Related CPT Codes

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.

CPT 23900: Forequarter Amputation, Upper Extremity and Shoulder Girdle

CPT-23921-SHOULDER-DISARTICULATION-STUMP-REMODELING

CPT 23921: Shoulder Disarticulation Stump Skin and Muscle Remodeling

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`50`	Bilateral Procedure	Use if procedure is performed on both upper extremities (rare for this code).
`62`	Two Surgeons	Use when two surgeons work together as primary surgeon and co-surgeon due to complexity.
`80`	Assistant Surgeon	Use when an assistant surgeon is documented and meets payer criteria.
`81`	Minimum Assistant Surgeon	Use when a minimal assistant surgeon role is documented.
`82`	Assistant Surgeon (When Qualified Resident Not Available)	Use when a qualified resident is not available and an assistant is required.
`22`	Increased Procedural Services	Use when documentation supports substantially greater work than typical for this procedure.
`52`	Reduced Services	Use when the procedure is partially reduced or not completed as described.
`53`	Discontinued Procedure	Use when the procedure was started but discontinued due to extenuating circumstances.
`26`	Professional Component	Use when reporting only the professional component of a service (rare for operative codes).
`78`	Unplanned Return to OR Following Initial Procedure for a Related Procedure	Use for immediate postoperative return to the operating room for a related procedure.
`79`	Unrelated Procedure or Service by the Same Physician During the Postoperative Period	(Not in provided list) Data not available in the input.
`LT`	Left Side	Use to identify the left upper extremity when laterality is required by the payer.
`RT`	Right Side	Use to identify the right upper extremity when laterality is required by the payer.

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.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
Data not available in the input.	Data not available in the input.	Data not available in the input.

Related CPT Codes

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.

CPT 23900: Forequarter Amputation, Upper Extremity and Shoulder Girdle

CPT-23921-SHOULDER-DISARTICULATION-STUMP-REMODELING

CPT 23921: Shoulder Disarticulation Stump Skin and Muscle Remodeling

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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CPT 23920: Forequarter Amputation Through Shoulder

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Billing Code Overview

OpenPayer

CPT 23920: Forequarter Amputation Through Shoulder

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

CPT 23920: Forequarter Amputation Through Shoulder

Sign up for cpt 23920 policy alerts

Billing Code Overview

CPT 23920: Forequarter Amputation Through Shoulder

Sign up for cpt 23920 policy alerts

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What clinical situation does CPT 23920 represent and when is it typically used?

What preoperative planning and site of service are described for procedures billed with CPT 23920?

Which related CPT codes might appear on the same claim as CPT 23920?

Which common modifiers are relevant to CPT 23920 claims and when should they be considered?

Which specialties commonly perform or manage care for patients undergoing CPT 23920 and which payers are referenced?

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What clinical situation does CPT 23920 represent and when is it typically used?

What preoperative planning and site of service are described for procedures billed with CPT 23920?

Which related CPT codes might appear on the same claim as CPT 23920?

Which common modifiers are relevant to CPT 23920 claims and when should they be considered?

Which specialties commonly perform or manage care for patients undergoing CPT 23920 and which payers are referenced?

References