Coding Ahead
CasePilot
Medical Coding Assistant
Case2Code
Search and Code Lookup Tool
RedactPHI
HIPAA-Compliant PHI Redaction
DetectICD10CM
ICD-10-CM Code Detection
Log in Register free account
1 code page views remaining. Guest accounts are limited to 1 page view. Register free account to get 5 more views.
Log in Register free account

Official Description

Allograft, includes templating, cutting, placement and internal fixation, when performed; intercalary, complete (ie, cylindrical) (List separately in addition to code for primary procedure)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 20934 refers to the procedure of inserting an allograft, which is a graft derived from a donor (typically cadaveric tissue), to reconstruct a bone or soft tissue deficit. This procedure is particularly relevant in cases where there is a need to address significant structural loss due to various medical conditions such as tumors, osteochondral cysts, posttraumatic or degenerative arthritis, traumatic injuries, or avascular necrosis. The primary goal of utilizing an allograft in these scenarios is to prevent limb amputation and to preserve the functionality of the limb. The allograft used in this procedure is often composed of bone, cartilage, or other tissues that are anatomically similar to the tissue that has been excised from the patient. During the procedure, the surgeon accesses the affected area, resects the damaged or diseased tissue down to viable healthy bone or tissue, and then prepares the allograft. The allograft is sculpted to match the contours of the removed tissue, using the excised bone or tissue as a template. Once shaped, the allograft is inserted into the prepared site and secured in place using various fixation methods, which may include rods, cerclage wires, intramedullary nails, plates, or screws. This procedure is categorized as intercalary, complete (cylindrical), meaning that a section of the diaphyseal portion of the bone is entirely removed, and the allograft serves to bridge the gap between the remaining ends of the native bone. It is important to note that this code is used in conjunction with the primary procedure code for radical resection of the diseased bone or joint or for the removal of an implant.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure associated with CPT® Code 20934 is indicated for the following conditions:

  • Tumors - The presence of bone tumors necessitating reconstruction to restore structural integrity.
  • Osteochondral cysts - Cysts affecting the bone and cartilage that require surgical intervention to prevent further damage.
  • Posttraumatic or degenerative arthritis - Conditions resulting from trauma or degeneration that lead to significant joint damage.
  • Traumatic injury - Injuries that result in substantial loss of bone or soft tissue requiring reconstruction.
  • Avascular necrosis - A condition where bone tissue dies due to a lack of blood supply, necessitating grafting to restore function.

2. Procedure

The procedure for CPT® Code 20934 involves several critical steps to ensure successful allograft placement:

  • Accessing the Affected Area - The surgeon begins by making an incision to access the diaphyseal portion of the bone that is affected by the condition. This step is crucial for visualizing the area that requires intervention.
  • Resecting the Damaged Tissue - Once access is achieved, the surgeon carefully resects the diseased or damaged bone or soft tissue down to viable healthy bone. This ensures that the allograft will have a solid foundation for integration.
  • Preparing the Allograft - The allograft, which is typically cadaveric tissue, is then sculpted to match the contours of the resected area. The surgeon uses the removed bone or tissue as a template to shape the allograft appropriately.
  • Inserting the Allograft - After preparation, the allograft is inserted into the resected site. This step is critical as it involves placing the graft in a manner that bridges the gap between the distal and proximal ends of the native bone.
  • Fixating the Allograft - Finally, the allograft is secured in place using appropriate fixation hardware, which may include rods, cerclage wires, intramedullary nails, plates, or screws. This fixation is essential for ensuring stability and promoting healing.

3. Post-Procedure

Post-procedure care for patients undergoing the allograft placement involves monitoring for any signs of complications, such as infection or graft failure. Patients may require rehabilitation to regain strength and mobility in the affected limb. The recovery process will vary depending on the extent of the surgery and the individual patient's condition. Follow-up appointments are essential to assess the integration of the allograft and to ensure proper healing. Additionally, patients may need to adhere to specific weight-bearing restrictions and physical therapy protocols as directed by their healthcare provider.

Short Descr INTERCALARY ALGRFT COMPL
Medium Descr INTERCALARY ALLOGRAFT COMPLETE
Long Descr Allograft, includes templating, cutting, placement and internal fixation, when performed; intercalary, complete (ie, cylindrical) (List separately in addition to code for primary procedure)
Status Code Active Code
Global Days ZZZ - Code Related to Another Service
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 0 - No payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 2 - Payment restriction for assistants at surgery does not apply to this procedure...
Co-Surgeons (62) 1 - Co-surgeons could be paid, though supporting documentation is required...
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Items and Services Packaged into APC Rates
ASC Payment Indicator Packaged service/item; no separate payment made.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) none
MUE 1

This is an add-on code that must be used in conjunction with one of these primary codes.

23210 MPFS Status: Active Code APC C Illustration for Code Radical resection of tumor; scapula
23220 MPFS Status: Active Code APC C CPT Assistant Article Illustration for Code Radical resection of tumor, proximal humerus
24150 MPFS Status: Active Code APC J1 CPT Assistant Article Illustration for Code Radical resection of tumor, shaft or distal humerus
25170 MPFS Status: Active Code APC J1 CPT Assistant Article Illustration for Code Radical resection of tumor, radius or ulna
27075 MPFS Status: Active Code APC C CPT Assistant Article Illustration for Code Radical resection of tumor; wing of ilium, 1 pubic or ischial ramus or symphysis pubis
27076 MPFS Status: Active Code APC C Illustration for Code Radical resection of tumor; ilium, including acetabulum, both pubic rami, or ischium and acetabulum
27077 MPFS Status: Active Code APC C Illustration for Code Radical resection of tumor; innominate bone, total
27365 MPFS Status: Active Code APC C CPT Assistant Article Illustration for Code Radical resection of tumor, femur or knee
27645 MPFS Status: Active Code APC C CPT Assistant Article Illustration for Code Radical resection of tumor; tibia
27704 MPFS Status: Active Code APC Q2 ASC A2 Illustration for Code Removal of ankle implant
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
62 Two surgeons: when 2 surgeons work together as primary surgeons performing distinct part(s) of a procedure, each surgeon should report his/her distinct operative work by adding modifier 62 to the procedure code and any associated add-on code(s) for that procedure as long as both surgeons continue to work together as primary surgeons. each surgeon should report the co-surgery once using the same procedure code. if additional procedure(s) (including add-on procedure(s) are performed during the same surgical session, separate code(s) may also be reported with modifier 62 added. note: if a co-surgeon acts as an assistant in the performance of additional procedure(s), other than those reported with the modifier 62, during the same surgical session, those services may be reported using separate procedure code(s) with modifier 80 or modifier 82 added, as appropriate.
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
82 Assistant surgeon (when qualified resident surgeon not available): the unavailability of a qualified resident surgeon is a prerequisite for use of modifier 82 appended to the usual procedure code number(s).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
GC This service has been performed in part by a resident under the direction of a teaching physician
LT Left side (used to identify procedures performed on the left side of the body)
RT Right side (used to identify procedures performed on the right side of the body)
Date
Action
Notes
2019-03-06 Changed Per CPT Errata, several codes in the Guidelines deleted.
2019-01-01 Added Added
Code
Description
Code
Description
CasePilot

Get instant expert-level medical coding assistance.

Ask about:
CPT Codes Guidelines Modifiers Crosswalks NCCI Edits Compliance Medicare Coverage
Example: "What is CPT code 99213?" or "Guidelines for E/M services"