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Official Description

Craniectomy, suboccipital; for exploration or decompression of cranial nerves

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

CPT® Code 61458 refers to a surgical procedure known as a suboccipital craniectomy, which is performed for the exploration or decompression of cranial nerves. This procedure is indicated when cranial nerves experience compression due to blood vessels crossing over them, leading to various neurological symptoms. The specific symptoms can vary based on which cranial nerves are affected; for instance, compression of the vestibular nerve may result in vertigo, while compression of the cochlear nerve can lead to tinnitus, characterized by ringing or other noises in the ears. During the procedure, the patient is positioned supine, and their head is stabilized using a Mayfield clamp. The surgical approach involves making a curvilinear incision behind the ear, ensuring careful avoidance of the greater and lesser occipital nerves. A small section of bone is then removed to access the cranial cavity, allowing for the dura mater to be incised and the posterior fossa to be decompressed. The procedure is typically performed with the assistance of an operating microscope, which enhances the surgeon's ability to visualize the cranial nerves. Microvascular decompression is achieved by placing small synthetic sponges between the compressing blood vessels and the affected nerves, thereby alleviating the pressure. This procedure is distinct from cranial nerve sectioning, which is indicated for more severe conditions such as Meniere's disease or vestibular neuritis. After the decompression or sectioning is completed, the dura is reapproximated, and the surgical site is meticulously closed in layers to promote healing.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 61458 is indicated for the following conditions:

  • Compression of Cranial Nerves - This occurs when blood vessels cross over cranial nerves, leading to symptoms such as vertigo or tinnitus.
  • Severe Vertigo - Particularly when associated with conditions like Meniere's disease or vestibular neuritis, which may necessitate exploration or decompression of affected cranial nerves.

2. Procedure

The suboccipital craniectomy procedure involves several critical steps to ensure effective exploration and decompression of cranial nerves:

  • Step 1: Patient Positioning - The patient is placed in a supine position, and their head is secured in a Mayfield clamp to maintain stability throughout the procedure.
  • Step 2: Incision - A curvilinear skin incision is made behind the ear, with careful attention to avoid damaging the greater and lesser occipital nerves.
  • Step 3: Bone Removal - A small section of bone is excised using a cutting bur to create access to the cranial cavity.
  • Step 4: Dura Incision - The dura mater is incised to allow for the decompression of the posterior fossa and exposure of the cerebellopontine angle.
  • Step 5: Exploration and Decompression - The cranial nerves are explored and decompressed under the guidance of an operating microscope, facilitating precise intervention.
  • Step 6: Microvascular Decompression - Small synthetic sponges are placed between the compressing blood vessels and the affected cranial nerves to relieve pressure.
  • Step 7: Closure - After completing the decompression, the dura is reapproximated, and the exposed mastoid air cells are sealed with bone wax. Gelfoam is applied over the dura, followed by Gelfilm, and the layers of muscle, fascia, and skin are closed meticulously.

3. Post-Procedure

Post-procedure care following a suboccipital craniectomy includes monitoring for any complications related to the surgery, such as infection or cerebrospinal fluid leaks. Patients may experience some discomfort and will require pain management. Recovery time can vary, and follow-up appointments are essential to assess healing and the effectiveness of the decompression. Rehabilitation may be necessary, especially if the patient experienced significant symptoms prior to the procedure.

Short Descr CRNEC SOPL XPL/DCMPR CRL NRV
Medium Descr CRNEC SOPL EXPLORATION/DECOMPRESSION CRANIAL NRV
Long Descr Craniectomy, suboccipital; for exploration or decompression of cranial nerves
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) P1G - Major procedure - Other
MUE 1
CCS Clinical Classification 9 - Other OR therapeutic nervous system procedures

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

69990 Addon Code MPFS Status: Restricted APC N ASC N1 PUB 100 CPT Assistant Article 1Microsurgical techniques, requiring use of operating microscope (List separately in addition to code for primary procedure)
GC This service has been performed in part by a resident under the direction of a teaching physician
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.
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).
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).
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.
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).
81 Minimum assistant surgeon: minimum surgical assistant services are identified by adding modifier 81 to the usual procedure number.
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
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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2025-01-01 Changed Short and Medium Descriptions changed.
Pre-1990 Added Code added.
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