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Official Description

Excision or curettage of bone cyst or benign tumor, tarsal or metatarsal, except talus or calcaneus; with allograft

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 28107 refers to the surgical procedure involving the excision or curettage of a bone cyst or benign tumor located in the tarsal or metatarsal bones, excluding the talus or calcaneus. A bone cyst is defined as a fluid-filled cavity within the bone, which can vary in type. The most common type is the unicameral or simple bone cyst, recognized as a benign lesion. Another type, the aneurysmal bone cyst, is characterized by vascular tissue surrounding a blood-filled cystic lesion. Additionally, there are various benign bone tumors, such as giant cell tumors, chondromyxoid fibromas, and enchondromas, which may also necessitate surgical intervention. The procedure begins with an incision made over the lesion site, followed by dissection of the soft tissues to expose the lesion. If a cystic lesion is identified, a window is created in the bone to access the cyst, allowing for fluid aspiration and laboratory analysis. The lining of the cystic cavity is then removed through curettage. In cases where benign tumors are present, the lesion is excised along with a margin of healthy bone. Following the excision or curettage, the resulting defect is filled with donor bone, known as allograft, to promote healing and structural integrity of the affected area.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 28107 is indicated for the treatment of specific conditions related to bone cysts and benign tumors in the tarsal or metatarsal bones, excluding the talus or calcaneus. The following conditions may warrant this surgical intervention:

  • Bone Cysts - Fluid-filled spaces within the bone that may require excision or curettage to alleviate symptoms or prevent complications.
  • Benign Bone Tumors - Non-cancerous growths such as giant cell tumors, chondromyxoid fibromas, and enchondromas that necessitate removal to prevent further issues or discomfort.

2. Procedure

The procedure for CPT® Code 28107 involves several critical steps to ensure the effective treatment of the bone cyst or benign tumor:

  • Step 1: Incision and Exposure - The surgeon begins by making an incision in the skin directly over the site of the lesion located in either a tarsal bone (excluding the talus) or a metatarsal bone. This incision allows for access to the underlying soft tissues, which are carefully dissected to expose the lesion for further treatment.
  • Step 2: Accessing the Cyst or Tumor - Once the lesion is exposed, if a cystic lesion is present, the surgeon incises the bone to create a window that provides access to the cyst. This step is crucial for allowing the aspiration of any fluid within the cyst, which is then sent for laboratory analysis.
  • Step 3: Curettage or Excision - Following the access to the cyst, a curette is inserted through the bone window to completely remove the lining of the cystic cavity via curettage. In cases where a benign tumor is present, the surgeon excises the tumor along with a margin of surrounding healthy bone to ensure complete removal.
  • Step 4: Packing the Defect - After the lesion has been treated, the resulting defect in the tarsal or metatarsal bone is packed with donor bone, known as allograft. This step is essential for promoting healing and restoring the structural integrity of the bone.

3. Post-Procedure

Post-procedure care following the excision or curettage of a bone cyst or benign tumor involves monitoring the surgical site for signs of infection and ensuring proper healing. Patients may be advised to limit weight-bearing activities on the affected foot to facilitate recovery. Follow-up appointments are typically scheduled to assess the healing process and to ensure that the allograft is integrating properly with the surrounding bone. Additional imaging studies may be required to evaluate the success of the procedure and to monitor for any recurrence of the cyst or tumor.

Short Descr REMOVE/GRAFT FOOT LESION
Medium Descr EXC/CURTG CST/B9 TUM TARSAL/METAR W/ALGRFT
Long Descr Excision or curettage of bone cyst or benign tumor, tarsal or metatarsal, except talus or calcaneus; with allograft
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) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Hospital Part B services paid through a comprehensive APC
ASC Payment Indicator Non office-based surgical procedure added in CY 2008 or later; payment based on OPPS relative payment weight.
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
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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).
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.
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.
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.)
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)
T2 Left foot, third digit
T6 Right foot, second digit
T7 Right foot, third digit
T9 Right foot, fifth digit
TA Left foot, great toe
Date
Action
Notes
2002-01-01 Changed Code description changed.
Pre-1990 Added Code added.
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