Summary & Overview
CPT 26843: Carpometacarpal Joint Fusion, Digit Other Than Thumb
CPT code 26843 represents surgical arthrodesis (fusion) of a carpometacarpal joint for a digit other than the thumb. This procedure addresses joint instability, pain, or deformity by surgically immobilizing the joint, sometimes using internal fixation devices. Nationally, the code is relevant to surgical billing and coverage for hand and upper-extremity procedures performed in operating rooms and ambulatory surgery centers.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise account of how CPT code 26843 is defined clinically, the typical procedural setting and provider specialties involved, and the common payer landscape that impacts reimbursement and coverage decisions. The publication outlines benchmarks and payment patterns, highlights policy and coding considerations that affect claim adjudication, and situates the code within the broader clinical context of hand surgery.
This summary equips billing managers, surgical practices, and policy analysts with the core facts about CPT code 26843, what to expect in site-of-service utilization, and the payer mix most likely encountered nationally.
Billing Code Overview
CPT code 26843 describes surgical immobilization of a carpometacarpal joint of a digit other than the thumb. The procedure involves fusing the joint where a metacarpal bone of the digit meets a carpal bone of the wrist; the provider may perform the fusion with or without internal fixation devices.
Service Type: Surgical procedure — joint arthrodesis of a finger carpometacarpal joint
Typical Site of Service: Operating room or ambulatory surgical center, commonly performed by an orthopedic surgeon or hand surgeon with the patient under regional or general anesthesia.
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Clinical & Coding Specifications
Clinical Context
A 58-year-old right-hand–dominant female presents with progressive dorsal wrist and long finger base pain and instability after prior severe crush injury to the hand. Conservative management including splinting, activity modification, anti-inflammatory medication, and corticosteroid injection failed to relieve pain. Imaging demonstrates degenerative arthrosis and subluxation at the carpometacarpal joint of the long finger (not the thumb). The hand surgeon schedules a fusion of the affected carpometacarpal joint under regional block with possible general anesthesia, performs joint preparation and bone grafting as needed, and achieves immob ilization with or without internal fixation (plate, screw, or K-wire). Postoperative workflow includes recovery in the ambulatory surgery unit or inpatient stay if medically indicated, postoperative immobilization in a cast or splint, wound checks, radiographic follow-up to document fusion, and hand therapy referral for range-of-motion and strengthening when fusion is confirmed.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work or operative time is substantially greater than typical for 26843 due to complexity. |
23 |