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Official Description

Sequestrectomy (eg, for osteomyelitis or bone abscess), scapula

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

A sequestrectomy is a surgical procedure aimed at removing a sequestrum, which is a segment of necrotic (dead) bone that has detached from the surrounding healthy bone tissue. This procedure is typically indicated in cases of osteomyelitis, an infection of the bone, or a bone abscess, which is a localized collection of pus within the bone. The sequestrectomy can be performed on various bones, including the clavicle, scapula, and humeral head to neck, with CPT® Code 23172 specifically referring to the procedure performed on the scapula. During the operation, an incision is made through the skin and soft tissue to access the affected area. If the periosteum, the layer of tissue covering the bone, is healthy, it is carefully lifted away from the sequestrum to allow for the excision of the necrotic bone. In cases where the periosteum is not viable, the surgeon may find that new bone, known as involucrum, has developed around the sequestrum. In such instances, the necrotic bone is removed while preserving the involucrum, which will aid in the healing process and contribute to the formation of new bone in the area of the cortical bone defect. After the necrotic tissue is excised, the incisions in the soft tissue and skin are closed, and a dressing is applied to protect the surgical site during the recovery period.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The sequestrectomy procedure is indicated for the following conditions:

  • Osteomyelitis - A serious infection of the bone that can lead to the death of bone tissue.
  • Bone Abscess - A localized infection within the bone that results in the accumulation of pus.

2. Procedure

The sequestrectomy procedure involves several critical steps to ensure the effective removal of the necrotic bone.

  • Step 1: Incision An incision is made in the skin over the area of the scapula where the osteomyelitis or bone abscess is located. This incision is carefully extended through the soft tissue to reach the underlying bone.
  • Step 2: Elevation of Periosteum If the periosteum, which is the fibrous tissue covering the bone, is found to be soft and viable, it is gently elevated away from the necrotic sequestrum. This step is crucial as it allows for direct access to the affected bone.
  • Step 3: Excision of Necrotic Bone The necrotic bone, identified as the sequestrum, is excised from the surrounding healthy bone. This removal is essential to eliminate the source of infection and promote healing.
  • Step 4: Closure of Periosteum After the sequestrum is removed, the ribbon of periosteum that was elevated is approximated over the cortical bone defect left by the excised bone. This helps in the healing process and supports the regeneration of healthy bone tissue.
  • Step 5: Handling Non-Viable Periosteum In cases where the periosteum is not viable and new bone, referred to as involucrum, has formed around the sequestrum, the necrotic bone is removed while leaving the involucrum intact. This is important as the involucrum will assist in the formation of new bone in the defect area.
  • Step 6: Closure of Incisions Finally, the incisions made in the soft tissue and skin are closed using appropriate suturing techniques, and a dressing is applied to protect the surgical site during the recovery phase.

3. Post-Procedure

After the sequestrectomy, patients can expect a recovery period that may involve monitoring for signs of infection and managing pain. The surgical site will require proper care, including keeping the dressing clean and dry. Follow-up appointments will be necessary to assess healing and ensure that the bone is regenerating appropriately. Rehabilitation may also be recommended to restore function and strength in the affected area.

Short Descr REMOVE SHOULDER BLADE LESION
Medium Descr SEQUESTRECTOMY SCAPULA
Long Descr Sequestrectomy (eg, for osteomyelitis or bone abscess), scapula
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) 1 - 150% payment adjustment for bilateral procedures applies.
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 Surgical procedure on ASC list in CY 2007; 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

This is a primary code that can be used with these additional add-on codes.

20700 Add-on Code MPFS Status: Active Code APC N ASC N1 Manual preparation and insertion of drug-delivery device(s), deep (eg, subfascial) (List separately in addition to code for primary procedure)
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).
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.)
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
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)
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Pre-1990 Added Code added.
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