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Official Description

Computer-assisted surgical navigational procedure for musculoskeletal procedures, image-less (List separately in addition to code for primary procedure)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

An image-less computer-assisted surgical navigational procedure is a sophisticated technique utilized in complex musculoskeletal surgeries. This procedure is designed to enhance the precision of surgical interventions by allowing surgeons to navigate through the surgical field with greater accuracy. The term "image-less" indicates that this navigational approach does not rely on pre-existing imaging studies, but instead utilizes real-time data and anatomical landmarks to guide the surgical process. This method is particularly beneficial for surgeries that involve small incisions, such as the fixation of femoral or pelvic fractures, where traditional imaging may not be feasible or necessary. The advantages of employing computer-assisted surgical navigation include improved surgical accuracy, reduced operative time, minimized blood loss, and a potentially shorter recovery period for patients. The procedure itself consists of three critical steps: data acquisition, registration, and tracking. During data acquisition, information related to joint rotation centers and visual anatomical landmarks is collected. Following this, registration techniques are applied to correlate the anatomical data with the actual bony structures present in the surgical field. Finally, tracking is conducted using specialized sensors and measurement devices, which provide real-time feedback to the surgeon regarding the placement of surgical instruments in relation to the bony anatomy, thereby facilitating a more controlled and effective surgical outcome.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The computer-assisted surgical navigational procedure is indicated for use in various complex musculoskeletal surgeries where precision is paramount. The following conditions and scenarios may warrant the application of this technique:

  • Complex Fractures The procedure is often indicated for the fixation of complex fractures, such as those involving the femur or pelvis, where accurate alignment and stabilization are critical for optimal healing.
  • Joint Reconstruction It may be utilized in joint reconstruction surgeries, where precise placement of implants is essential to restore function and mobility.
  • Deformity Correction The procedure can assist in surgeries aimed at correcting skeletal deformities, ensuring that anatomical structures are accurately realigned.
  • Minimally Invasive Surgeries It is particularly beneficial in minimally invasive surgical approaches, where traditional imaging may not be available or practical, allowing for enhanced navigation through small incisions.

2. Procedure

The computer-assisted surgical navigational procedure involves a systematic approach consisting of three main steps, each critical to the overall success of the surgery.

  • Data Acquisition In the first step, data acquisition is performed using image-less navigation techniques. This involves gathering information related to the centers of joint rotation and identifying visual anatomical landmarks that are crucial for the surgical procedure. The data collected during this phase serves as the foundation for the subsequent steps.
  • Registration The second step is registration, where the anatomical data obtained during the data acquisition phase is correlated with the bony anatomy present in the surgical field. This process involves creating a computer-generated model based on the image-less anatomical information and matching it to the surface data points collected during the surgery. This ensures that the navigational system accurately reflects the patient's unique anatomy.
  • Tracking The final step is tracking, which utilizes sensors and measurement devices to provide real-time feedback during the surgical procedure. This tracking mechanism allows the surgeon to monitor the placement of surgical tools in relation to the bony anatomy, ensuring that instruments are positioned correctly and enhancing the overall precision of the surgery.

3. Post-Procedure

After the completion of the computer-assisted surgical navigational procedure, post-operative care is essential to ensure optimal recovery. Patients may be monitored for any immediate complications related to the surgery. Rehabilitation protocols will typically be initiated based on the specific procedure performed and the patient's overall condition. The use of computer-assisted navigation is expected to contribute to a reduced recovery time, allowing patients to begin rehabilitation sooner than with traditional surgical methods. Follow-up appointments will be necessary to assess healing and functionality, and to make any adjustments to the rehabilitation plan as needed.

Short Descr CPTR-ASST DIR MS PX
Medium Descr CPTR-ASST SURGICAL NAVIGATION IMAGE-LESS
Long Descr Computer-assisted surgical navigational procedure for musculoskeletal procedures, image-less (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) 0 - Payment restriction for assistants at surgery applies 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 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) P1G - Major procedure - Other
MUE 2
CCS Clinical Classification 164 - Other OR therapeutic procedures on musculoskeletal system
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
RT Right side (used to identify procedures performed on the right side of the body)
LT Left side (used to identify procedures performed on the left side of the body)
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.
GA Waiver of liability statement issued as required by payer policy, individual case
GC This service has been performed in part by a resident under the direction of a teaching physician
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
GZ Item or service expected to be denied as not reasonable and necessary
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
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.)
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.
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).
CR Catastrophe/disaster related
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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).
SG Ambulatory surgical center (asc) facility service
GY Item or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit
TC Technical component; under certain circumstances, a charge may be made for the technical component alone; under those circumstances the technical component charge is identified by adding modifier 'tc' to the usual procedure number; technical component charges are institutional charges and not billed separately by physicians; however, portable x-ray suppliers only bill for technical component and should utilize modifier tc; the charge data from portable x-ray suppliers will then be used to build customary and prevailing profiles
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
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.
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).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) 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).
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.
77 Repeat procedure by another physician or other qualified health care professional: it may be necessary to indicate that a basic procedure or service was repeated by another physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 77 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.)
81 Minimum assistant surgeon: minimum surgical assistant services are identified by adding modifier 81 to the usual procedure number.
AG Primary physician
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
ER Items and services furnished by a provider-based, off-campus emergency department
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
GW Service not related to the hospice patient's terminal condition
GX Notice of liability issued, voluntary under payer policy
KX Requirements specified in the medical policy have been met
PD Diagnostic or related non diagnostic item or service provided in a wholly owned or operated entity to a patient who is admitted as an inpatient within 3 days
PN Non-excepted service provided at an off-campus, outpatient, provider-based department of a hospital
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
QJ Services/items provided to a prisoner or patient in state or local custody, however the state or local government, as applicable, meets the requirements in 42 cfr 411.4 (b)
SA Nurse practitioner rendering service in collaboration with a physician
T2 Left foot, third digit
TV Special payment rates, holidays/weekends
XP Separate practitioner, a service that is distinct because it was performed by a different practitioner
Date
Action
Notes
2011-01-01 Changed Guideline information changed.
2009-01-01 Changed Code description changed
2008-01-01 Added First appearance in code book in 2008.
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