Osteosynthesis CPT Codes
There is no single CPT code called “osteosynthesis.” Osteosynthesis, the surgical fixation of bone using plates, screws, rods, nails, or wires, is reported using anatomically specific procedure codes. These fall within the Musculoskeletal System section of the CPT manual, spanning codes 20000 through 29999.
Code selection depends on four factors:
- The bone or joint being treated
- The surgical approach: open, closed, or percutaneous
- The fixation type: internal hardware or external frame
- Whether it is initial repair, a revision, or hardware removal
What Are Osteosynthesis CPT Codes?
Osteosynthesis CPT codes report procedures that repair or stabilize broken bones. Surgeons use plates, screws, rods, nails, wires, or external fixation devices to hold the bone in place.
There is no single CPT code for osteosynthesis. Instead, coders choose a code based on the procedure performed and the bone treated.
Most osteosynthesis procedures fall under fracture treatment, ORIF, external fixation, osteotomy, nonunion repair, or hardware removal codes. These codes appear throughout the Musculoskeletal System section of the CPT manual.
Accurate code selection depends on several factors:
- The bone or joint treated
- The surgical approach used
- The type of fixation applied
- Whether the procedure is an initial repair, revision, or hardware removal
Because these procedures often involve complex surgeries, payers closely review the operative note to verify code selection.
How CPT Organizes Osteosynthesis Codes
CPT groups osteosynthesis procedures into functional categories rather than a single “osteosynthesis” section. The main categories are hardware removal, external fixation, open fracture treatment by anatomical region, deformity correction and osteotomy, and nonunion or malunion repair.
Internal fixation performed during the same fracture repair is included in the fracture treatment code. Reporting it separately creates an NCCI bundling violation. A separate hardware code is only appropriate when fixation occurs on a distinct anatomical site in the same operative session.
Osteosynthesis CPT Codes by Procedure Type
Let’s walk you through all the CPT codes for osteosynthesis by procedures.
Hardware Removal CPT Codes
Hardware removal is one of the most audited categories in osteosynthesis billing. Use these codes only when the removal procedure itself is the primary reason for the operative encounter.
Do not append 20680 simply because the operative note mentions implants. The chart must document that the hardware removal required deep surgical exposure as the primary procedure.
External Fixation CPT Codes
External fixation codes apply when the surgeon stabilizes a fracture using pins or wires connected to an external frame rather than internal hardware. These are reported in addition to the fracture treatment code.
| CPT Code | Procedure Description | Notes |
|---|---|---|
| 20690 | Application of uniplane external fixation (pins or wires in 1 plane, unilateral) | Reported with fracture treatment code |
| 20692 | Application of multiplane external fixation (Ilizarov or Monticelli type) | Pins or wires in more than one plane |
| 20693 | Adjustment or revision of external fixation requiring anesthesia | New pins, wires, rings, or bars during revision |
| 20696 | Multiplane external fixation with stereotactic computer-assisted adjustment | Includes imaging and alignment computation |
| 20697 | Exchange of strut in stereotactic multiplane external fixation | Reported per strut exchange |
Osteosynthesis CPT Codes by Anatomical Region
Let’s walk you through all the CPT codes for osteosynthesis by anatomical regions.
Upper Extremity ORIF CPT Codes
Open reduction and internal fixation codes for the upper extremity are selected by bone, anatomical level, and fracture complexity. For the distal radius, code selection depends on whether the fracture is extra-articular or intra-articular and how many fragments require reduction.
| CPT Code | Procedure | Anatomical Site |
|---|---|---|
| 23615 | Open treatment of proximal humeral fracture with internal fixation | Shoulder |
| 24515 | Open treatment of humeral shaft fracture with plates and screws | Upper arm |
| 24516 | Open treatment of humeral shaft fracture with intramedullary fixation | Upper arm |
| 24546 | Open treatment of humeral supracondylar fracture with intercondylar extension | Elbow |
| 25607 | Open treatment of distal radial fracture, extra-articular, with internal fixation | Wrist |
| 25608 | Open treatment of distal radial fracture, intra-articular, single fragment | Wrist |
| 25609 | Open treatment of distal radial fracture, intra-articular, multiple fragments | Wrist |
CPT 24515 applies specifically to plate and screw fixation. If the surgeon uses an intramedullary nail for the humeral shaft, use 24516 instead. Submitting 24515 for intramedullary fixation is a common coding error that triggers payer audits.
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Lower Extremity ORIF CPT Codes
Lower extremity ORIF codes cover the hip, femur, tibial plateau, tibial shaft, fibula, and ankle. These codes carry a 90-day global surgery period. Any related procedure within that window requires a modifier.
| CPT Code | Procedure | Anatomical Site |
|---|---|---|
| 27245 | Open treatment of proximal femoral or hip fracture with intramedullary implant | Hip |
| 27506 | Open treatment of femoral shaft fracture with internal fixation | Femur |
| 27536 | Open treatment of proximal tibial fracture (plateau), bicondylar, with or without internal fixation | Knee |
| 27759 | Treatment of tibial shaft fracture with intramedullary implant | Tibial shaft |
| 27792 | Open treatment of distal fibular fracture with internal fixation | Lateral ankle |
| 27826 | Open treatment of pilon or tibial plafond fracture, fibula only, with internal fixation | Ankle |
| 27827 | Open treatment of pilon or tibial plafond fracture, tibia only, with internal fixation | Ankle |
| 27828 | Open treatment of pilon or tibial plafond fracture, tibia and fibula, with internal fixation | Ankle |
For CPT 27826-27828, code selection is based on which bone received internal fixation during the operative encounter. Billing 27828 when only the fibula was fixed is a frequent over-coding error with audit exposure.
Pelvis and Acetabulum Osteosynthesis Codes
Pelvic and acetabular fixation codes carry high audit risk with CMS and commercial payers. The operative note must document the specific bone, approach, and fracture pattern to support code selection.
| CPT Code | Procedure | Notes |
|---|---|---|
| 27216 | Percutaneous skeletal fixation of posterior pelvic fracture, unilateral | Includes ipsilateral ilium, sacroiliac joint, and sacrum |
| 27217 | Open treatment of anterior pelvic fracture with internal fixation | Pubic symphysis and ipsilateral superior/inferior rami |
| 27218 | Open treatment of posterior pelvic fracture with internal fixation | Ipsilateral ilium, sacroiliac joint, and sacrum |
| 27226 | Open treatment of posterior or anterior acetabular wall fracture with internal fixation | Single wall |
| 27227 | Open treatment of acetabular fracture, one column or transverse, with internal fixation | Includes T-fracture variant |
| 27228 | Open treatment of acetabular fracture, two columns, with internal fixation | Both-column and complete articular detachment fractures |
Foot, Ankle, and Podiatry ORIF CPT Codes
Foot and ankle osteosynthesis codes are frequently reported by podiatrists and orthopedic surgeons. Laterality modifiers (-LT or -RT) are mandatory on every foot and ankle claim. For a complete guide to foot-related billing, see podiatry medical billing services.
| CPT Code | Procedure | Anatomical Site |
|---|---|---|
| 28415 | Open treatment of calcaneal fracture with internal fixation | Heel |
| 28445 | Open treatment of talus fracture with internal fixation | Talus |
| 28485 | Open treatment of metatarsal fracture with internal fixation | Metatarsal |
| 28505 | Open treatment of phalangeal fracture (foot), without fixation | Toe |
| 28525 | Open treatment of phalangeal fracture with internal fixation | Toe |
| 28675 | Open treatment of tarsometatarsal joint dislocation with internal fixation | Midfoot |
Osteotomy and Deformity Correction CPT Codes
Osteotomy codes apply when the surgeon cuts and realigns bone to correct a structural deformity. Internal fixation is often performed during osteotomy and is typically included in the osteotomy code unless a distinct, separate fixation procedure is documented.
| CPT Code | Procedure | Site |
|---|---|---|
| 27165 | Osteotomy, intertrochanteric or subtrochanteric, including internal or external fixation | Hip |
| 27450 | Osteotomy, femur, shaft or supracondylar, with fixation | Femur |
| 27705 | Osteotomy, tibia | Tibial shaft |
| 28296 | Correction of hallux valgus with metatarsal osteotomy and internal fixation | First metatarsal |
| 28298 | Correction of hallux valgus with additional sesamoid procedure | First metatarsal |
| 28306 | Osteotomy of first metatarsal for structural deformity correction | Forefoot |
| 28310 | Osteotomy of phalanx for toe deformity correction | Toe |
Nonunion and Malunion Repair CPT Codes
Nonunion and malunion codes apply when a fracture failed to heal correctly and requires surgical intervention. These are distinct from the original fracture repair codes and are reported when the operative goal is healing correction, not initial stabilization.
| CPT Code | Procedure | Notes |
|---|---|---|
| 25400 | Repair of nonunion or malunion, radius or ulna; without graft | Compression technique |
| 25405 | Repair of nonunion or malunion, radius or ulna; with autograft | Graft harvesting included in code |
| 27470 | Repair of nonunion or malunion, femur; without graft | Compression technique |
| 27472 | Repair of nonunion or malunion, femur; with iliac or other autograft | Graft harvesting included in code |
| 27720 | Repair of nonunion or malunion, tibia; without graft | Compression technique |
| 27724 | Repair of nonunion or malunion, tibia; with iliac or other autograft | Graft harvesting included in code |
When autograft harvesting is already included in the primary code descriptor, billing a separate harvest code creates an NCCI edit violation. Always confirm graft inclusion before adding a harvest code.
Osteosynthesis Billing and Modifier Guidelines
Osteosynthesis billing requires more than selecting the correct fracture treatment code. Providers must apply appropriate modifiers, follow global surgery rules, document fixation methods accurately, and avoid common bundling violations.
The sections below cover the important billing considerations for orthopedic and surgical claims.
Required Modifiers for Osteosynthesis Billing
Payers audit osteosynthesis claims for laterality, staged procedures, and multi-surgeon scenarios. Missing or incorrect modifiers are one of the top causes of preventable denials in orthopedic billing. For a detailed reference on Modifier -59 and the X modifiers, see our Modifier 59 billing guide.
| Modifier | Name | When to Use |
|---|---|---|
| -LT | Left side | All left-side extremity osteosynthesis codes |
| -RT | Right side | All right-side extremity osteosynthesis codes |
| -54 | Surgical care only | Surgeon performs fixation; separate provider handles 90-day post-op care |
| -55 | Post-operative management only | Separate provider assumes care for the global period |
| -58 | Staged or related procedure | Hardware removal planned and documented before the initial global period ends |
| -59 | Distinct procedural service | Osteosynthesis performed on a separate, distinct bone in the same session |
| -78 | Unplanned return to OR | Complication requiring return to operating room within the global period |
| -62 | Two surgeons | Complex cases requiring separate operative reports from two surgeons |
Common Osteosynthesis Billing Errors
Wrong approach code: Closed treatment codes cannot be used when the operative note describes open surgical exposure. The approach in the documentation must match the CPT code selected.
Missing laterality modifier: Every extremity osteosynthesis code requires -LT or -RT. Omitting laterality causes automatic denial from Medicare and most commercial payers.
Incorrect hardware removal code: CPT 20680 requires deep surgical exposure as the primary procedure. Do not report it because screws or plates are mentioned in a revision note.
Bundling fixation with the fracture code: Internal fixation on the same bone and site as the fracture repair is included in the ORIF code. Billing a separate hardware code for the same site creates a bundling violation.
Not checking autograft inclusion: Several nonunion repair codes include graft harvesting in the descriptor. Billing a separate harvest code when it is already included creates an NCCI violation.
Ignoring the global period: Most ORIF codes carry a 90-day global surgery period. Any related procedure during that window requires Modifier -58 (staged) or -78 (unplanned complication). Omitting the modifier results in denial.
Get Osteosynthesis Claims Paid Correctly the First Time
Orthopedic billing has some of the highest audit risk in surgical coding. A single modifier error or wrong approach code on a high-dollar ORIF claim can cost a practice thousands in denied revenue. Our billing team handles orthopedic and surgical claim submissions with documented code selection rationale and modifier compliance built into every claim.
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Frequently Asked Questions About Osteosynthesis CPT Codes
Let’s answer a few questions about osteosynthesis CPT codes.
Is there a single CPT code for osteosynthesis?
No. Osteosynthesis is a surgical technique, not a standalone billable procedure. The correct CPT code depends on the bone treated, the surgical approach, and the type of fixation. All relevant codes fall within the 20000-29999 musculoskeletal range of the CPT manual.
Is internal fixation separately reportable from the fracture repair?
Not when it is performed at the same site during the same fracture repair. Internal fixation is included in the open fracture treatment code. Separate reporting is appropriate only when fixation is performed on a distinct anatomical bone in the same session, using Modifier -59 to avoid bundling denials.
What is the global surgery period for ORIF procedures?
Most open fracture treatment codes carry a 90-day global surgery period. Any related procedure during that window requires a modifier. Modifier -58 applies to staged procedures planned before surgery. Modifier -78 applies to unplanned complications requiring a return to the operating room.
When do you use CPT 20680 vs CPT 20670?
Use 20680 when removing a deep implant, such as a buried plate, screw, or intramedullary rod, that requires formal surgical exposure through a skin incision. Use 20670 when removing a superficial implant like a wire or pin near the skin surface that does not require deep dissection.
Can external fixation be billed with a fracture treatment code?
Yes. External fixation codes 20690 and 20692 are reported in addition to the fracture treatment code when the surgeon applies an external device during the same encounter. The operative note must document the external fixation as a distinct service with its own rationale.
What documentation is required for osteosynthesis CPT codes?
The operative note must include the bone treated, the surgical approach (open, closed, or percutaneous), the type and anatomical location of fixation hardware, the fracture pattern, and any grafts performed. Payers use the operative note to validate code selection during post-payment audits.