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Official Description

Ostectomy of sternum, partial

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 21620 refers to the surgical removal of a portion of the sternum, known as an ostectomy of the sternum. This operation is typically performed to address various medical conditions that may affect the sternum, such as tumors, infections, or other pathologies that necessitate the removal of a segment of this bone. The sternum, commonly referred to as the breastbone, is a flat bone located in the center of the chest, serving as a critical component of the rib cage, which protects vital organs such as the heart and lungs. During the procedure, the physician makes an incision in the chest above the sternum to gain access to the bone. Once the sternum is identified, surrounding tissues are carefully dissected to expose the area of interest. Surgical instruments, including saws, are employed to excise the specified portion of the sternum. After the removal, the remaining bone edges are smoothed to promote healing and reduce the risk of complications. The surgical site is then irrigated to ensure cleanliness, and the incisions are meticulously closed to facilitate recovery. This procedure requires careful planning and execution to minimize risks and ensure optimal outcomes for the patient.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

Ostectomy of the sternum, as described by CPT® Code 21620, may be indicated for several specific medical conditions or circumstances, including:

  • Bone Tumors The procedure may be performed to remove malignant or benign tumors located on the sternum that could compromise the integrity of the bone or surrounding structures.
  • Infections In cases where the sternum is affected by osteomyelitis or other severe infections, an ostectomy may be necessary to excise the infected bone tissue and prevent the spread of infection.
  • Trauma Following significant chest trauma, such as fractures or dislocations involving the sternum, an ostectomy may be required to address complications or to facilitate proper healing.
  • Congenital Anomalies Certain congenital conditions affecting the sternum may necessitate surgical intervention, including ostectomy, to correct structural deformities.

2. Procedure

The procedure for an ostectomy of the sternum involves several critical steps, which are outlined as follows:

  • Step 1: Incision The surgeon begins by making a precise incision in the chest above the sternum. This incision is strategically placed to provide optimal access to the sternum while minimizing damage to surrounding tissues.
  • Step 2: Identification and Isolation Once the incision is made, the surgeon carefully identifies and isolates the sternum. This step is crucial for ensuring that the surgical field is clear and that the sternum can be accessed without interference from adjacent structures.
  • Step 3: Dissection The surrounding tissue is meticulously dissected to expose the sternum fully. This dissection must be performed with care to avoid injury to nearby organs and blood vessels.
  • Step 4: Removal of Bone Using specialized surgical instruments, including saws, the surgeon removes the designated portion of the sternum. This step requires precision to ensure that only the affected area is excised while preserving as much healthy bone as possible.
  • Step 5: Smoothing the Bone After the removal of the bone, the remaining edges of the sternum are smoothed. This is an important step to promote healing and reduce the risk of complications, such as bone irritation or infection.
  • Step 6: Irrigation The surgical site is then irrigated to cleanse the area of any debris or blood, ensuring a clean environment for healing.
  • Step 7: Closure Finally, the incisions made during the procedure are carefully closed. This may involve suturing the skin and underlying tissues to facilitate proper healing and minimize scarring.

3. Post-Procedure

After the ostectomy of the sternum, patients can expect specific post-procedure care and considerations. Monitoring for signs of infection, such as increased redness, swelling, or discharge at the incision site, is essential. Pain management will be addressed, and patients may be prescribed analgesics to manage discomfort. Activity restrictions are typically advised to allow for proper healing, and patients may be instructed to avoid heavy lifting or strenuous activities for a specified period. Follow-up appointments will be necessary to assess the healing process and to ensure that there are no complications arising from the surgery. Rehabilitation or physical therapy may also be recommended to restore strength and mobility in the chest area as the patient recovers.

Short Descr PARTIAL REMOVAL OF STERNUM
Medium Descr OSTECTOMY STERNUM PARTIAL
Long Descr Ostectomy of sternum, partial
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) P3D - Major procedure, orthopedic - other
MUE 1
CCS Clinical Classification 142 - Partial excision bone
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).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
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.
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.
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.
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
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).
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)
RT Right side (used to identify procedures performed on the right side of the body)
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
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