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Official Description

Resection or excision of neoplastic, vascular or infectious lesion of base of posterior cranial fossa, jugular foramen, foramen magnum, or C1-C3 vertebral bodies; extradural

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 61615 involves the surgical removal of a lesion that may be neoplastic (tumor-related), vascular (related to blood vessels), or infectious in nature. This procedure specifically targets lesions located at the base of the posterior cranial fossa, which is the area at the back of the skull that houses critical structures such as the brainstem and cerebellum. The surgical site may include the jugular foramen, foramen magnum, or the C1-C3 vertebral bodies, which are the uppermost vertebrae in the cervical spine. Importantly, the procedure is classified as extradural, meaning that the lesion is situated outside the dura mater, the tough membrane that encases the brain and spinal cord. This distinction is crucial as it influences the surgical approach and potential complications associated with the procedure. The removal of such lesions is typically performed to alleviate symptoms, prevent further complications, or obtain tissue for diagnostic purposes.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 61615 is indicated for the removal of lesions that may present various clinical challenges. The following conditions may warrant this surgical intervention:

  • Neoplastic Lesions These are abnormal growths that may be benign or malignant, requiring excision to prevent further growth or metastasis.
  • Vascular Lesions These lesions involve blood vessels and may cause complications such as bleeding or compression of surrounding structures, necessitating removal.
  • Infectious Lesions Lesions caused by infections may require excision to eliminate the source of infection and prevent further complications.

2. Procedure

The procedure for CPT® Code 61615 involves several critical steps to ensure the safe and effective removal of the lesion. Each step is designed to minimize risk and maximize the chances of a successful outcome.

  • Step 1: Patient Preparation The patient is positioned appropriately, often in a supine position, to provide optimal access to the surgical site. Anesthesia is administered to ensure the patient is comfortable and pain-free during the procedure.
  • Step 2: Surgical Access An incision is made in the skin over the posterior cranial fossa to access the underlying structures. The surgeon carefully dissects through the soft tissues to reach the extradural space where the lesion is located.
  • Step 3: Lesion Identification Once access is achieved, the surgeon identifies the lesion using imaging guidance if necessary. This step is crucial for ensuring that the correct lesion is targeted for removal.
  • Step 4: Excision of the Lesion The surgeon excises the lesion, taking care to preserve surrounding healthy tissue and minimize damage to adjacent structures. This may involve the use of specialized instruments to ensure precision.
  • Step 5: Closure After the lesion is removed, the surgical site is carefully closed in layers. The skin is sutured or stapled, and sterile dressings are applied to protect the area during the initial healing phase.

3. Post-Procedure

Following the procedure, patients are typically monitored in a recovery area to ensure they are stable and to manage any immediate postoperative concerns. Post-procedure care may include pain management, monitoring for signs of infection, and ensuring proper wound healing. Patients may be advised on activity restrictions and follow-up appointments to assess recovery and any further treatment needs. The expected recovery time can vary based on the individual’s overall health and the complexity of the procedure, but close follow-up is essential to address any complications that may arise.

Short Descr RESECT/EXCISE LESION SKULL
Medium Descr RESCJ/EXC LES BASE POST CRNL FOSSA JUG FRMN XDRL
Long Descr Resection or excision of neoplastic, vascular or infectious lesion of base of posterior cranial fossa, jugular foramen, foramen magnum, or C1-C3 vertebral bodies; extradural
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) 2 - Team surgeons permitted; pay by report.
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 1 - Incision and excision of CNS

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)
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).
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.)
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).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
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)
Date
Action
Notes
2011-01-01 Changed Short description changed.
1994-01-01 Added First appearance in code book in 1994.
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