Summary & Overview

CPT 29046: Application of Long Arm Splint (Shoulder to Hand)

CPT code 29046 is a nationally recognized billing code for the application of a long arm splint, spanning from the shoulder to the hand. This procedure is a cornerstone in orthopedic care, used to immobilize the upper extremity following fractures or trauma, and is typically performed in an office setting. The code is relevant for a wide range of clinical scenarios, including management of humerus, radius, and ulna fractures.

Major payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, Medicare, and UnitedHealthcare. Understanding coverage and reimbursement policies for CPT code 29046 is essential for providers and healthcare organizations navigating orthopedic billing and compliance.

Readers will gain insight into the clinical context of the procedure, payer coverage details, and related coding benchmarks. The publication also highlights common modifiers, associated taxonomies, and relevant ICD-10 diagnoses, providing a comprehensive overview for those involved in orthopedic billing and policy. This summary serves as a resource for understanding the national landscape of CPT code 29046 and its role in orthopedic practice.

AetnaBlue Cross Blue ShieldCigna HealthMedicareUnitedHealthcareCPT 29046orthopedicssplint applicationlong arm splintoffice settingmedical billingfracture managementclinical codingpolicy updateprocedure benchmarks

CPT Code Overview

CPT code 29046 represents the application of a long arm splint, extending from the shoulder to the hand. This procedure is commonly performed in orthopedic settings to immobilize the arm following fractures or injuries, ensuring proper healing and alignment. The typical site of service for this procedure is the office setting (Place of Service 11), where orthopedic specialists provide care for patients requiring splinting of the upper extremity. This code is integral to orthopedic practice, supporting effective management of upper limb injuries.

Clinical & Coding Specifications

Clinical Context

A patient presents to the orthopedic office with a closed fracture of the shaft of the humerus or forearm, such as the radius or ulna. The injury is acute and requires immobilization to promote healing and prevent further damage. The orthopedic physician evaluates the patient, confirms the diagnosis with clinical assessment and imaging, and determines that a long arm splint (from shoulder to hand) is necessary. The splint is applied in the office setting to stabilize the affected limb, typically for initial management before definitive treatment or as part of conservative care.

Coding Specifications

Modifiers:
- LT: Indicates the procedure was performed on the left side.
- RT: Indicates the procedure was performed on the right side.
Provider Taxonomies:

Code	Specialty
`207X00000X`	Orthopaedic Surgery Physician
`207XX0004X`	Orthopaedic Trauma Physician
`207XX0801X`	Sports Medicine (Orthopaedic Surgery) Physician

Use of Modifiers:
- Modifier LT or RT is appended to specify laterality when applying the long arm splint.
Specialties:
- These taxonomies represent physicians specializing in orthopedic surgery, trauma, and sports medicine who are qualified to perform and bill for the application of a long arm splint.

Related Diagnoses

S42.401A - Unspecified fracture of shaft of humerus, right arm, initial encounter for closed fracture
- Indicates a closed fracture of the right humerus shaft, commonly requiring immobilization with a long arm splint.
S52.501A - Unspecified fracture of the lower end of right radius, initial encounter for closed fracture
- Represents a closed fracture of the distal radius, which may necessitate a long arm splint for stabilization.
S52.301A - Unspecified fracture of shaft of radius, right arm, initial encounter for closed fracture
- Denotes a closed fracture of the radius shaft, often managed with a long arm splint.
S52.201A - Unspecified fracture of shaft of ulna, right arm, initial encounter for closed fracture
- Refers to a closed fracture of the ulna shaft, where a long arm splint is appropriate for immobilization.
S42.202A - Unspecified fracture of shaft of humerus, left arm, initial encounter for closed fracture
- Indicates a closed fracture of the left humerus shaft, also managed with a long arm splint.

Related CPT Codes

29125 - Application of short arm splint (forearm to hand); static
- Used for immobilization of injuries limited to the forearm or wrist, as opposed to the entire arm.
29130 - Application of finger splint; static
- Used for immobilization of finger fractures or injuries, not involving the arm.
29065 - Application of long arm cast (shoulder to hand)
- Used when a rigid cast is required for immobilization, rather than a splint.
29105 - Application of long arm splint (shoulder to hand); static
- Similar to 29046, but specifically denotes a static splint. May be used as an alternative depending on clinical needs.
Clinical Workflow:
- 29046 is used for long arm splint application. Related codes may be used as alternatives based on injury location or immobilization method. 29125 and 29130 are used for more distal injuries, while 29065 is for casting rather than splinting. 29105 may be used interchangeably with 29046 for static splints.

National Reimbursement Benchmarks

Medicare's national mean rate for CPT code 29046 is $377.04, which is higher than the BUCA (average commercial) mean rate of $333.31. Among the commercial payers, UnitedHealth Group has the highest mean rate at $463.38, while Aetna is the lowest at $202.17.

Rate dispersion, measured by the difference between the 75th and 25th percentiles, varies significantly across payers. Aetna shows the tightest range at $103.50, indicating less variability in rates, while UnitedHealth Group exhibits the widest range at $273.00, reflecting greater variability. Medicare's range is $42.00, the narrowest among all payers, suggesting highly consistent rates nationally.

The table and chart below present the full breakdown of national benchmarks for CPT code 29046 across major payers.

National Mean Rates by Payer for CPT Code `29046`

Related Codes

97763

CPT 97763: Orthotic and Prosthetic Management, Subsequent Encounter

99310

CPT 99310: Subsequent Nursing Facility Care, High Complexity

97546

CPT 97546: Additional Hour of Physical Medicine & Rehabilitation Therapeutic Procedures

29450

CPT 29450: Application of Long or Short Leg Clubfoot Cast

97012

CPT 97012: Mechanical Traction Therapy in Physical Medicine

99306

CPT 99306: Initial Nursing Facility Care, High Complexity Evaluation and Management

99309

CPT 99309: Subsequent Nursing Facility Care, Moderate Complexity

29580

CPT 29580: Application of Unna Boot for Wound Care and Orthotic Strapping

29705

CPT 29705: Removal or Repair of Casts and Strapping

29044

CPT 29044: Application of Body Cast, Shoulder to Hips and Down One Thigh

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