Summary & Overview

CPT 23600: Closed Treatment of Proximal Humerus (Humeral Neck) Fracture

CPT code 23600 denotes the closed treatment of a surgical or anatomical neck fracture of the proximal humerus. This code captures nonoperative, closed management of upper humeral neck fractures and is relevant to orthopedic, emergency, and trauma care nationally because it categorizes care settings where operative intervention is not performed. Accurate use of the code affects clinical documentation, facility billing, and aggregated utilization metrics for fracture management.

The analysis covers major national payers: Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of payer coverage patterns, common billing modifiers associated with fracture care, and clinical context for when closed treatment is appropriate versus open surgical management. The publication also summarizes benchmark metrics where available, highlights documentation elements that support code selection, and outlines policy considerations that influence payer processing for nonoperative humeral neck fractures.

Intended for coding professionals, orthopedic clinicians, and revenue cycle stakeholders, the summary provides practical context for CPT code 23600, focusing on coding accuracy, site-of-service implications, and payer considerations relevant across the United States.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 23600orthopedicsfracture careproximal humerusclosed treatmentemergency medicineambulatory surgical centerbilling and coding

Billing Code Overview

CPT code 23600 describes a closed treatment of a surgical or anatomical neck fracture of the upper end of the humerus. The procedure involves realigning the fracture without open surgery and does not include manipulation or adjustment requiring an open approach.

Service type: Fracture care / orthopedic closed treatment
Typical site of service: Hospital outpatient department, ambulatory surgical center, or emergency department with orthopedic or trauma services

Clinical & Coding Specifications

Clinical Context

A 72-year-old female slips on ice and presents to the emergency department with acute left shoulder pain, swelling, and limited active range of motion after a fall onto the outstretched hand. Radiographs show a nondisplaced surgical neck fracture of the proximal humerus without neurovascular compromise. The orthopedic provider performs a closed treatment consisting of brief local or regional anesthesia, closed reduction if necessary without open surgical exposure, immobilization with a sling or shoulder immobilizer, and placement of written and verbal discharge instructions. Typical workflow includes triage and imaging in the ED or outpatient urgent care, orthopedic evaluation, documentation of fracture type and alignment, performance of closed treatment in procedure room or ED, post-procedure imaging to confirm alignment, and scheduling follow-up for serial radiographs and rehabilitation.

Coding Specifications

Modifier	Description	When to Use
`25`	Significant, separately identifiable evaluation and management service on same day as procedure	Use when a distinct E/M visit is performed and documented the same day as closed treatment.
`51`	Multiple procedures	Use when multiple distinct procedures are performed in the same session in addition to the closed humeral neck treatment.
`52`	Reduced services	Use if the procedure was partially reduced or not completed as typically described.
`53`	Discontinued procedure	Use when the procedure is started but halted due to unforeseen circumstances.
`59`	Distinct procedural service	Use to indicate a separate, distinct service from other procedures performed on the same day.
`76`	Repeat procedure by same physician (Note: `76` was not in provided list; alternative: use `79` if needed)	Data not available in the input.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use for an unrelated service performed during an existing postoperative period.
`RT`	Right side	Use to indicate the procedure was performed on the right arm.
`LT`	Left side	Use to indicate the procedure was performed on the left arm.
`GA`	Waiver of liability statement on file (Note: `GA` not in provided list)	Data not available in the input.

Taxonomy Code	Specialty	Notes
Data not available in the input.	Orthopedic Surgery	Providers who commonly perform closed treatment of proximal humerus fractures, including general orthopedists and trauma specialists.
Data not available in the input.	Emergency Medicine	Emergency physicians may perform closed reductions and immobilization in the ED prior to orthopedic follow-up.
Data not available in the input.	Family Medicine with Sports Medicine	Primary care sports-medicine physicians may manage select closed fractures in outpatient settings.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`S42.2X0A`	Fracture of surgical neck of humerus, unspecified, initial encounter for closed fracture	Directly describes the typical injury treated with closed management in `23600`.
`S42.2X1A`	Fracture of greater tubercle of humerus, initial encounter for closed fracture	Proximal humerus fractures involving the greater tuberosity may be managed with closed treatment depending on displacement.
`S42.2X2A`	Fracture of surgical neck of humerus, displaced, initial encounter for closed fracture	Displacement may still be initially treated closed if tolerable or in certain patient populations.
`S42.2X3A`	Fracture of surgical neck of humerus, comminuted, initial encounter for closed fracture	Comminution affects stability and may influence decision between closed versus open treatment; initial closed care may be attempted in select cases.
`S42.001A`	Fracture of unspecified part of clavicle, initial encounter for closed fracture	Clavicle fractures can present similarly in shoulder trauma evaluation and are frequently differentiated by imaging prior to treatment.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`23605`	Closed treatment of surgical neck fracture; with manipulation, with or without skeletal traction	Performed when manipulation is required to achieve or improve alignment beyond simple immobilization.
`23650`	Open treatment of proximal humeral fracture, includes internal fixation	Represents the open surgical alternative when closed treatment fails or fracture is displaced/unstable.
`73030`	Radiologic examination, shoulder; complete, minimum of two views	Commonly obtained pre- and post-procedure to diagnose the fracture and confirm reduction/alignment.
`20690`	Application of external fixation device (unlisted specific)	May be used when external fixation is required for unstable proximal humerus fractures after closed attempts.
`99024`	Postoperative follow-up visit, global period, related evaluation	Used for routine follow-up visits within the surgical global period to monitor healing and immobilization.