Need help choosing the right code?
Ask CasePilot about procedures, modifiers, bundling, and coding guidance.
Try CasePilot© Copyright 2026 American Medical Association. All rights reserved.
The procedure described by CPT® Code 20955 involves the harvesting of a bone graft specifically from the fibula, which is one of the long bones located in the lower leg. This process is essential for reconstructive surgery, where the harvested bone is utilized to fill a defect in another area of the body. The procedure begins with the physician carefully isolating and dissecting the fibula bone while ensuring that the associated blood vessels remain intact. This is crucial as the blood vessels will be necessary for the graft to survive and integrate into the recipient site. After the bone graft is harvested, the donor site is meticulously closed in layers to promote proper healing and minimize complications. The harvested graft is then positioned to fill the defect at the designated site, where the blood vessels from the graft are anastomosed, or surgically connected, to the vessels in the defect area. This connection is vital for ensuring adequate blood supply to the graft, which is essential for its viability and successful integration. Finally, the defect area is closed with layered sutures, completing the procedure. This code is specifically designated for the use of a fibula graft, distinguishing it from other codes that pertain to grafts harvested from different anatomical sites, such as the iliac crest or metatarsal.
© Copyright 2026 Coding Ahead. All rights reserved.
The procedure associated with CPT® Code 20955 is indicated for various clinical scenarios where bone reconstruction is necessary. The following conditions may warrant the use of a fibula bone graft:
The procedure for harvesting a fibula bone graft with microvascular anastomosis involves several critical steps, each designed to ensure the successful acquisition and application of the graft:
Post-procedure care following the harvesting of a fibula bone graft with microvascular anastomosis is critical for ensuring successful recovery and integration of the graft. Patients are typically monitored for any signs of complications, such as infection or graft failure. Pain management is provided as needed, and patients may be advised to limit weight-bearing activities on the affected limb to promote healing. Follow-up appointments are essential to assess the healing process and the viability of the graft. Rehabilitation may be recommended to restore function and strength to the affected area, depending on the extent of the procedure and the patient's overall health status.
| Short Descr | FIBULA BONE GRAFT MICROVASC | Medium Descr | BONE GRAFT MICROVASCULAR ANASTOMOSIS FIBULA | Long Descr | Bone graft with microvascular anastomosis; fibula | Status Code | Active Code | Global Days | 090 - Major Surgery | PC/TC Indicator (26, TC) | 0 - Physician Service Code | Multiple Procedures (51) | 2 - Standard 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 | Inpatient Procedures, not paid under OPPS | Type of Service (TOS) | 2 - Surgery | Berenson-Eggers TOS (BETOS) | P5B - Ambulatory procedures - musculoskeletal | MUE | 1 | CCS Clinical Classification | 161 - Other OR therapeutic procedures on bone |
| 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. | 51 | Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d). | 52 | Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use). | 58 | Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78. | 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. | 78 | Unplanned return to the operating/procedure room by the same physician or other qualified health care professional following initial procedure for a related procedure during the postoperative period: it may be necessary to indicate that another procedure was performed during the postoperative period of the initial procedure (unplanned procedure following initial procedure). when this procedure is related to the first, and requires the use of an operating/procedure room, it may be reported by adding modifier 78 to the related procedure. (for repeat procedures, see modifier 76.) | 79 | Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.) | 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 | CR | Catastrophe/disaster related | 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) | Q1 | Routine clinical service provided in a clinical research study that is in an approved clinical research study | RT | Right side (used to identify procedures performed on the right side of the body) |
|
Date
|
Action
|
Notes
|
|---|---|---|
| 2011-01-01 | Changed | Short description changed. |
| Pre-1990 | Added | Code added. |
Get instant expert-level medical coding assistance.