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Official Description

Laminotomy (hemilaminectomy), with decompression of nerve root(s), including partial facetectomy, foraminotomy and/or excision of herniated intervertebral disc; each additional interspace, cervical or lumbar (List separately in addition to code for primary procedure)

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

A laminotomy, also referred to as a hemilaminectomy, is a surgical procedure performed to relieve pressure on the spinal cord or nerve roots. This is achieved through a posterior approach, where an incision is made into the lamina, which is the bony arch of the vertebra. The primary goal of this procedure is to decompress the affected nerve root(s) that may be compressed due to various conditions, such as herniated intervertebral discs or spinal stenosis. During the procedure, the surgeon may also perform a partial facetectomy, which involves the removal of a portion of the facet joint, and a foraminotomy, which is the widening of the foramen—the opening through which the nerve roots exit the spinal column. The procedure may also include the excision of herniated disc material that is pressing on the nerves. The surgical approach typically involves careful dissection of the muscles and verification of the surgical level using radiographic imaging. The use of an operating microscope allows for precision in removing the necessary bone and tissue to alleviate nerve compression. This code, CPT® 63035, is specifically designated for each additional interspace treated, whether in the cervical or lumbar region, following the primary procedure, which is reported separately using codes 63020 for cervical interspace and 63030 for lumbar interspace.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The procedure is indicated for various conditions that result in nerve root compression, which may include:

  • Herniated Intervertebral Disc - A condition where the disc material protrudes and compresses nearby nerve roots.
  • Spinal Stenosis - Narrowing of the spinal canal that can lead to pressure on the spinal cord and nerves.
  • Degenerative Disc Disease - A condition characterized by the deterioration of intervertebral discs, potentially causing nerve compression.
  • Facet Joint Osteoarthritis - Degeneration of the facet joints that may contribute to nerve root irritation or compression.

2. Procedure

The procedure involves several key steps, which are detailed as follows:

  • Step 1: Incision and Exposure - The surgeon marks the skin incision and proceeds to make an incision down to the spinous processes of the vertebrae. The surrounding muscles are carefully retracted to expose the lamina and facet joint.
  • Step 2: Verification of Surgical Level - Radiographic imaging is utilized to confirm the correct level of the spine that requires intervention, ensuring accuracy in the surgical approach.
  • Step 3: Bone Removal - Using a bone drill, the surgeon removes a portion of the lamina and the facet joint, which is referred to as a partial facetectomy. This step is crucial for creating additional space for the compressed nerve(s).
  • Step 4: Ligament and Nerve Exposure - The ligamentum flavum, which connects the laminae of adjacent vertebrae, may be excised to expose the dura mater and the compressed nerve roots. This allows for direct access to the affected area.
  • Step 5: Foraminotomy - The surgeon inspects the openings under the facet joints where the nerve roots exit. If necessary, additional bone may be removed to relieve pressure on the nerve roots, a procedure known as foraminotomy.
  • Step 6: Disc Material Removal - Any ruptured disc fragments or bulging nucleus pulposus are excised to further decompress the affected nerve(s), alleviating pain and restoring function.
  • Step 7: Closure - After the necessary decompression has been achieved, the surgical wound is closed in layers, ensuring proper healing and minimizing the risk of complications.

3. Post-Procedure

Post-procedure care typically involves monitoring the patient for any immediate complications and managing pain effectively. Patients may be advised to engage in physical therapy to aid recovery and improve mobility. Follow-up appointments are essential to assess the surgical site and ensure proper healing. The expected recovery time may vary based on the extent of the procedure and the individual patient's health status. It is important for patients to adhere to their physician's recommendations regarding activity restrictions and rehabilitation exercises to optimize recovery outcomes.

Short Descr SPINAL DISK SURGERY ADD-ON
Medium Descr LAMNOTMY W/DCMPRSN NRV EACH ADDL CRVCL/LMBR
Long Descr Laminotomy (hemilaminectomy), with decompression of nerve root(s), including partial facetectomy, foraminotomy and/or excision of herniated intervertebral disc; each additional interspace, cervical or lumbar (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) 1 - 150% payment adjustment for bilateral procedures applies.
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) 2 - Co-surgeons permitted and no documentation required if the two- specialty requirement is met.
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
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P1F - Major procedure - explor/decompr/excis disc
MUE 4
CCS Clinical Classification 3 - Laminectomy, excision intervertebral disc

This is an add-on code that must be used in conjunction with one of these primary codes.

63020 MPFS Status: Active Code APC J1 ASC G2 Physician Quality Reporting CPT Assistant Article Laminotomy (hemilaminectomy), with decompression of nerve root(s), including partial facetectomy, foraminotomy and/or excision of herniated intervertebral disc; 1 interspace, cervical
63030 MPFS Status: Active Code APC J1 ASC G2 Physician Quality Reporting CPT Assistant Article Laminotomy (hemilaminectomy), with decompression of nerve root(s), including partial facetectomy, foraminotomy and/or excision of herniated intervertebral disc; 1 interspace, lumbar
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
50 Bilateral procedure: unless otherwise identified in the listings, bilateral procedures that are performed at the same session, should be identified by adding modifier 50 to the appropriate 5 digit code. note: this modifier should not be appended to designated "add-on" codes (see appendix d).
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)
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).
GC This service has been performed in part by a resident under the direction of a teaching physician
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.)
SG Ambulatory surgical center (asc) facility service
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.
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.
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.
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.
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.)
81 Minimum assistant surgeon: minimum surgical assistant services are identified by adding modifier 81 to the usual procedure number.
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
CR Catastrophe/disaster related
GA Waiver of liability statement issued as required by payer policy, individual case
SA Nurse practitioner rendering service in collaboration with a physician
T5 Right foot, great toe
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
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
Date
Action
Notes
2012-01-01 Changed Description Changed
2009-01-01 Changed Code description changed
2007-01-01 Changed Code description changed.
Pre-1990 Added Code added.
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