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Official Description

Stereotactic computer-assisted (navigational) procedure; cranial, extradural (List separately in addition to code for primary procedure)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Stereotactic procedures are advanced surgical techniques that utilize a defined three-dimensional coordinate system, facilitated by computer technology, to enhance the precision of interventions performed on the brain. The primary advantage of these procedures is the ability to conduct them with minimal invasiveness, often without the need for general anesthesia. This is achieved through the use of smaller skin incisions and reduced bone openings, which significantly lowers the risk associated with traditional surgical methods. During the procedure, a local anesthetic is administered to the planned pin sites on the skull to ensure patient comfort. A stereotactic ring is then carefully positioned over the skull, and pins are inserted through the skin into the skull to stabilize the patient's head, preventing any movement during the procedure. Following this, a second localizing ring is temporarily affixed to the stereotactic ring, and a CT scan is performed to gather critical imaging data. The information from the CT scan is processed using specialized navigational computer software, which generates precise coordinates that guide the surgeon to the optimal location for making skin incisions and bone cuts. This meticulous approach allows for accurate targeting of lesions or specific regions of the brain, thereby enhancing the effectiveness of the definitive procedure that follows. It is important to note that CPT® Code 61782 specifically refers to procedures performed outside the dura mater (extradural), while CPT® Code 61781 is designated for those conducted within or beneath the dura mater (intradural).

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The stereotactic computer-assisted (navigational) procedure, coded as CPT® 61782, is indicated for various conditions that require precise targeting within the cranial cavity. The following are the explicitly provided indications for this procedure:

  • Brain Lesions The procedure is often performed to locate and treat brain lesions, which may include tumors or other abnormal growths that require surgical intervention.
  • Biopsy Procedures Stereotactic navigation is utilized for obtaining tissue samples from specific areas of the brain, allowing for accurate diagnosis of various neurological conditions.
  • Functional Neurosurgery This procedure may be indicated for functional neurosurgical interventions, such as those aimed at treating movement disorders or epilepsy, where precise targeting is crucial.

2. Procedure

The stereotactic computer-assisted procedure involves several critical steps to ensure accuracy and safety during the intervention. The following procedural steps are outlined:

  • Step 1: Anesthesia Administration The procedure begins with the administration of a local anesthetic at the planned pin sites on the patient's skull. This step is essential to minimize discomfort during the placement of the stereotactic ring and pins.
  • Step 2: Stereotactic Ring Placement A stereotactic ring is then carefully positioned over the skull. This ring serves as a reference point for the surgical procedure and is crucial for maintaining the stability of the patient's head throughout the operation.
  • Step 3: Pin Insertion Pins are inserted through the skin and into the skull to immobilize the head. This immobilization is vital to prevent any movement that could compromise the accuracy of the procedure.
  • Step 4: CT Scan Acquisition A second localizing ring is temporarily placed on the stereotactic ring, and a CT scan is performed. This imaging step is critical for gathering detailed anatomical information about the brain and the targeted area.
  • Step 5: Data Analysis and Coordinate Generation The data obtained from the CT scan is analyzed using specialized navigational computer software. This software generates a set of coordinates that pinpoint the precise location for the skin incision and bone cuts, ensuring accurate targeting of the lesion or region of interest.
  • Step 6: Definitive Procedure Execution Finally, the physician utilizes the stereotactic equipment and the coordinates derived from the CT scan to perform the definitive procedure. This step is where the actual surgical intervention takes place, guided by the precise navigational data.

3. Post-Procedure

After the completion of the stereotactic computer-assisted procedure, patients typically undergo monitoring to assess their recovery. Post-procedure care may include managing any discomfort or pain at the incision sites and monitoring for potential complications. Patients are usually advised on activity restrictions and follow-up appointments to evaluate the success of the procedure and to discuss any further treatment options if necessary. The expected recovery time can vary based on the specific procedure performed and the individual patient's health status.

Short Descr SCAN PROC CRANIAL EXTRA
Medium Descr STRTCTC CPTR ASSTD PX EXTRADURAL CRANIAL
Long Descr Stereotactic computer-assisted (navigational) procedure; cranial, extradural (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) I4B - Imaging/procedure - other
MUE 1
CCS Clinical Classification 9 - Other OR therapeutic nervous system procedures
GC This service has been performed in part by a resident under the direction of a teaching physician
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.
SG Ambulatory surgical center (asc) facility service
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main 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).
CR Catastrophe/disaster related
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.
33 Preventive services: when the primary purpose of the service is the delivery of an evidence based service in accordance with a us preventive services task force a or b rating in effect and other preventive services identified in preventive services mandates (legislative or regulatory), the service may be identified by adding 33 to the procedure. for separately reported services specifically identified as preventive, the modifier should not be used.
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.
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.)
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).
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
CG Policy criteria applied
ET Emergency services
GA Waiver of liability statement issued as required by payer policy, individual case
GW Service not related to the hospice patient's terminal condition
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
GZ Item or service expected to be denied as not reasonable and necessary
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
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
RT Right side (used to identify procedures performed on the right side of the body)
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
X3 Episodic/broad services: for reporting services by clinicians who have broad responsibility for the comprehensive needs of the patient that is limited to a defined period and circumstance such as a hospitalization; reporting clinician service examples include but are not limited to the hospitalist's services rendered providing comprehensive and general care to a patient while admitted to the hospital
XP Separate practitioner, a service that is distinct because it was performed by a different practitioner
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
Date
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2013-01-01 Changed Guideline information changed.
2011-01-01 Added Added
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