CurrentPremera BluecrossPolicy BCBSA Ref. Policy: 7.01.141

Lumbar Spinal Fusion Policy

Policy governs medical necessity review and site-of-service determination for elective single-level lumbar spinal fusion in adults (age 19+), including indications, documentation requirements, coding, and definitions. It specifies conditions when single-level fusion may be considered medically necessary, conditions considered not medically necessary or investigational, and site-of-service criteria for elective surgical procedures.

Policy Summary

PayerPremera Bluecross

PolicyLumbar Spinal Fusion Policy

Policy CodePolicy BCBSA Ref. Policy: 7.01.141

Change TypeMultiple historical coding/criteria clarifications; recent reorganizations and documentation requirements

Effective DateDec 1, 2024

Next Review DateN/A

Key ActionSubmit required documentation (smoking cessation statement, imaging reports including flexion-extension X-rays, and evidence of failed conservative therapy) to support medical necessity and site-of-service review.

POLICY UPDATE CHANGES

Historical policy revisions clarified instability thresholds (e.g., addition of 4 mm translational instability in 09/11/12 history entry) and added CPT codes 22633 and 22634 on 01/11/12.

Annual literature reviews and guideline incorporations noted through 2024 references (NASS 2021, AAOS 2021, NICE 2017).

CPT codes 22633 and 22634 were added (01/11/12).

Policy statements extensively revised to clarify instability (added 4 mm translational instability), spinal stenosis, and pseudoarthrosis; failure of 6 months nonsurgical care removed from all policy statements (09/11/12).

Definitions for truncal imbalance, spondylolisthesis, and pseudoarthrosis added (multiple dates 2012-2016).

Smoking within the previous 6 weeks is a contraindication for lumbar spinal fusion; documentation of cessation required (04/14/15 update).

Diagnostic imaging (CT, MRI) must be performed within 12 months of surgery for documentation review (12/08/15).

CPT codes 22853, 22854, and 22859 added replacing deleted 22851 effective 01/01/17.

CPT code 62290 removed (10/01/17) and 0309T removed (01/01/19).

Policy title changed to 'Lumbar Spinal Fusion in Adults' and juvenile/adolescent scoliosis criteria removed (12/01/21).

Medically necessary statement for revision surgery for implant/instrumentation failure added effective for dates of service on or after September 2, 2022.

Multiple-level lumbar spinal fusion declared not medically necessary when criteria are not met for all levels (12/01/23).

Reorganized criteria for recurrent (same level) disc herniation to call out rapidly progressive symptoms of motor loss, neurogenic claudication, or cauda equina syndrome as stand-alone criteria (03/01/24).

Annual literature review updates noted repeatedly; most recent literature review through July 17, 2024 added (12/01/24).

Single-levelScope

Adult 19+Population

>=4Spondylolisthesis mm threshold

30°Cobb angle threshold

6 weeksSmoking cessation prior to surgery

12 moImaging recency requirement

2022-09-02Revision surgery effective date

Coverage Summary

This policy governs medical necessity review and site-of-service determination for elective, single-level lumbar spinal fusion in adults aged 19 and older and is CURRENT with an effective date of 2024-12-01 and last review on 2025-08-01. The stance on coverage is mixed: fusion is considered medically necessary for specific conditions (for example, instability, deformity, recurrent herniation, pseudarthrosis, and implant failure) when detailed imaging and clinical criteria are met, while routine fusion for indications without instability or deformity is not supported. The policy also specifies documentation and preoperative requirements (including smoking cessation and imaging recency) and reviews site-of-service for elective procedures.

Key thresholds and scope

Spondylolisthesis shift (flexion/extension X-ray)>= 4 millimeters

Cobb angle (severe degenerative scoliosis)>= 30 degrees

Sagittal vertical axis (significant sagittal imbalance)> 5 centimeters

Conservative care duration (most indications)>= 3 months (scoliosis: >= 1 year for progression)

Smoking cessation prior to elective surgery>= 6 weeks nonsmoking (written documentation required)

Imaging recency for CT/MRIPerformed and reported within 12 months of surgery

Scope summaryAdults age 19+; single-level lumbar fusion focus

Medical-Necessity Criteria

Provider Actions & Documentation Requirements

Prior Authorization

Medical necessity review required

Elective single-level lumbar fusion and the site of service will be reviewed for medical necessity. Providers must supply required documentation to support criteria; review applies to elective procedures and site-of-service determinations.

Elective single-level lumbar fusion is subject to medical necessity review
Site-of-service (outpatient hospital, ambulatory surgical center, inpatient hospital) will be reviewed

Documentation Required

Smoking status documentation / Smoking cessation documentation requirement

Documentation must include current smoking status and a written statement that the individual was non-smoking for the 6 weeks prior to scheduled (non-emergent) surgery. Emergent surgery is exempt from this requirement.

Coding

Covered/Relevant CPT codes for lumbar fusion and related proceduresCPTCovered

22533	Arthrodesis, lateral extracavitary technique; including minimal discectomy to prepare interspace (other than for decompression); lumbar
22534	Arthrodesis, lateral extracavitary technique; each additional vertebral segment
22558	Arthrodesis, anterior interbody technique; including minimal discectomy to prepare interspace; lumbar
22585	Arthrodesis, anterior interbody technique; each additional interspace
22612	Arthrodesis, posterior or posterolateral technique, single interspace; lumbar
22614	Arthrodesis, posterior or posterolateral technique, each additional interspace
22630	Arthrodesis, posterior interbody technique; single interspace; lumbar
22632	Arthrodesis, posterior interbody technique; each additional interspace
22633	Arthrodesis, combined posterior or posterolateral technique with posterior interbody technique; single interspace; lumbar
22634	Arthrodesis, combined posterior or posterolateral technique with posterior interbody technique; each additional interspace

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CPT codes mentioned historically (policy history references additions)CPT

22633	CPT code added to policy on 01/11/12 (posterior or posterolateral fusion, lumbar)
22634	CPT code added to policy on 01/11/12 (lumbar fusion including laminectomy/laminotomy)

CPT codes referenced in history/updatesCPT

22633	Spinal fusion, lumbar - historical addition noted
22634	Spinal fusion, lumbar - historical addition noted
22853	Anterior instrumentation; lumbar (added 01/01/17)
22854	Anterior instrumentation; lumbar (added 01/01/17)
22859	Additional spinal instrumentation code (added 01/01/17)
22851	Deleted 01/01/17 (replaced by 22853/22854/22859)
62290	Removed 10/01/17
0309T	Removed 01/01/19 (terminated 1/1/18)
22553	Referenced in site-of-service review update (2021)
22558	Referenced in site-of-service review update (2021)

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Background & Evidence Summary

Policy background summarizes indications, controversy, surgical approaches, instrumentation, and the overall evidence theme that routine fusion is not supported in the absence of instability or deformity. Fusion is commonly used to stabilize an unstable spine or correct deformity (for example, severe scoliosis) and is frequently combined with decompression when instability is anticipated; however, its use is controversial for isolated conditions such as spinal stenosis, degenerative disc disease, disc herniation, and chronic nonspecific low back pain.

Surgical approaches include anterior, lateral, and posterior interbody techniques (ALIF, PLIF, TLIF) as well as lateral and oblique lateral approaches and posterolateral or circumferential (360°) fusion; procedures may be open or minimally invasive. Instrumentation and implants (interbody cages, plates, pedicle screws, rods) and biologic agents (e.g., bone morphogenetic proteins) are often used to stabilize the spine and promote fusion.

Evidence from randomized trials, cohort studies, and systematic reviews is mixed across indications. High‑quality RCTs comparing decompression with versus without fusion for stenosis and low‑grade spondylolisthesis have reported conflicting results and have shown higher operative and perioperative adverse events with added fusion. Society guideline input (NASS, AANS/CNS, AAOS, NICE) and clinical vetting emphasize fusion for deformity or documented instability and recommend against routine addition of fusion for isolated stenosis or disc herniation without instability; several organizations call for conservative therapy prior to elective fusion when appropriate.

Key evidence highlights

RCTs (decompression +/- fusion)Two RCTs (2016) with differing conclusions; addition of fusion increased operative/perioperative adverse outcomes; routine fusion not supported for stenosis without instability

Definitions & Thresholds

Key definitions used in the policy:

Cauda Equina Syndrome (CES): Sudden neurologic emergency with rapidly progressive neurologic symptoms (severe low back pain radiating to legs, severe muscle weakness, urinary or bowel retention or incontinence, loss of sensation below the waist, and absent lower extremity reflexes).

Conservative nonsurgical therapy: includes prescription‑strength analgesics (including anti‑inflammatories), adjunctive medications (nerve membrane stabilizers, muscle relaxants if appropriate), participation in at least six weeks of physical therapy (or documented intolerance), evaluation/management of cognitive/behavioral/addiction issues when present, and documentation of compliance.

Persistent debilitating pain: defined as daily pain with a VAS > 4 and documented impact on activities of living despite optimal conservative nonsurgical therapy.

Pseudarthrosis: radiologic evidence of lack of union at the fused location after spinal fusion surgery.

Neurogenic claudication: leg pain or weakness relieved by change in position or leaning forward, commonly seen in lumbar spinal stenosis.

Isthmic spondylolisthesis: spondylolisthesis caused by a pars interarticularis fracture (Wiltse type I congenital or type II acquired).

Circumferential fusion: a 360° fusion joining vertebral bodies and transverse processes (typically anterior and posterior approaches).

Posterolateral fusion: fusion where the transverse processes are decorticated and covered with bone autograft or allograft.

TLIF/PLIF/ALIF: abbreviations for Transforaminal/Posterior/Anterior lumbar interbody fusion approaches differentiated by surgical access route.

Medicare Determinations

Name	Type	Effective Date	Number
Spinal Fusion for the Treatment of Low Back Pain Secondary to Lumbar Degenerative Disc Disease	NCD	2006

Revision History

01/11/12added

CPT codes 22633 and 22634 were added (01/11/12).

09/11/12revised

Policy statements extensively revised to clarify instability by adding a 4 mm translational instability threshold; spinal stenosis and pseudoarthrosis criteria clarified; failure of 6 months nonsurgical care removed from all policy statements.

04/14/15clarified

Smoking within the previous 6 weeks is a contraindication for lumbar spinal fusion; documentation of cessation required (changed from prior 3 months requirement and specified documentation).

Policy Summary

PayerPremera Bluecross

PolicyLumbar Spinal Fusion Policy

Policy CodePolicy BCBSA Ref. Policy: 7.01.141

Change TypeMultiple historical coding/criteria clarifications; recent reorganizations and documentation requirements

Effective DateDec 1, 2024

Next Review DateN/A

On This Page

Written statement confirming non-smoking for 6 weeks before scheduled non-emergent surgery
Not required for emergent surgery

Documentation Required

Imaging radiologist report / Flexion-extension X-ray report / Document instability and imaging

Provide the radiologist's report for diagnostic imaging (MRI or CT) performed within the past 12 months; imaging must be performed and read by an independent radiologist. Submit copy of most recent flexion-extension X-ray report demonstrating presence or absence of lumbar instability. Functional flexion/extension thresholds used in the policy include translational instability criteria (e.g., at least a 4 mm shift cited historically in policy thresholds; NASS references dynamic instability >3 mm between views) to document instability.

MRI or CT report dated within 12 months, read by an independent radiologist
Flexion-extension X-ray report required to document instability
Instability thresholds referenced in policy (flexion/extension translation criteria)

Documentation Required

Conservative treatment failure

Document failure of conservative nonsurgical therapy prior to considering fusion. Generally a duration of at least 3 months of conservative care is required; for severe degenerative scoliosis the policy specifies at least 1 year of conservative therapy for some clinical criteria. Conservative nonsurgical therapy is defined to include prescription-strength analgesics (including anti-inflammatories), adjunctive medications (e.g., nerve membrane stabilizers, muscle relaxants if appropriate), participation in at least six weeks of physical therapy (or documented intolerance), evaluation/management of cognitive/behavioral/addiction issues when present, and documentation of compliance.

Failure of >= 3 months of conservative care for most indications
Failure of >= 1 year of conservative care for specified severe degenerative scoliosis criteria
Conservative therapy examples: prescription analgesics/anti-inflammatories, adjunct meds, ≥6 weeks physical therapy, behavioral/addiction evaluation, documented compliance

Billing Rule

Coding updates and deletions

Providers must bill using current CPT codes. Key historical coding transitions noted in the policy: CPT code 22851 was deleted and replaced by 22853, 22854, and 22859 effective 01/01/17; CPT code 62290 was removed effective 10/01/17; CPT code 0309T was removed effective 01/01/19 (terminated 1/1/18). Verify and bill the appropriate current CPT codes.

22851 deleted; replaced by 22853 / 22854 / 22859 effective 01/01/17
62290 removed 10/01/17
0309T removed 01/01/19 (terminated 1/1/18)
Bill current CPT codes as reflected in policy history

Prior Authorization

Revision surgery effective date for implant/instrumentation failure

A medically necessary statement for revision surgery for implant/instrumentation failure was added effective for dates of service on or after September 2, 2022. Prior authorization/review may apply per policy.

Effective date for revision surgery statement: 2022-09-02
Prior authorization/review may be required

Documentation Required

Radiology report requirement for review

Submit a copy of the radiologist's MRI or CT report for review; imaging must have been performed within the past 12 months and read by an independent radiologist. If there are discrepancies in interpretation, the radiologist's report will supersede.

MRI/CT report must be within 12 months of surgery
Report must be read by an independent radiologist
Radiologist's report supersedes if interpretation discrepancies exist

Systematic reviews / meta-analysesMultiple systematic reviews and meta-analyses cited summarizing fusion vs non-fusion across indications

Effect of smoking on fusion ratesSystematic review and large retrospective studies show lower fusion rates in smokers; cessation improves outcomes

High-profile randomized trialsNotable trials cited including Ghogawala (2016/2021) and Forsth et al. (NEJM 2016, Austevoll/Forsth references) comparing decompression with/without fusion

Smoking cessation: written statement documenting the individual was nonsmoking for at least 6 weeks prior to scheduled (non‑emergent) surgery.

Numeric thresholds (compact)

Spondylolisthesis shift on flexion/extension X-ray>= 4 millimeters

Dynamic translational instability (NASS referenced)> 3 millimeters difference between flexion-extension or supine vs upright

Spondylolisthesis anterolisthesis (NASS)>= 3 millimeters

Cobb angle for severe degenerative scoliosis>= 30 degrees

Sagittal vertical axis (sagittal imbalance)> 5 centimeters

Conservative care duration>= 3 months (most indications); >= 1 year for documented progression in scoliosis

Smoking cessation before elective surgery>= 6 weeks nonsmoking (written statement required)

Imaging recencyCT/MRI performed and read within 12 months of surgery

Pseudarthrosis symptom durationPresence of symptoms for at least 6 months (NASS criteria)

12/08/15clarified

Diagnostic imaging (CT, MRI) must be performed within 12 months of surgery for documentation review.

01/01/17added

CPT codes 22853, 22854, and 22859 were added replacing deleted code 22851 effective 01/01/17 (coding update).

10/01/17removed

CPT code 62290 was removed from the policy (10/01/17).

01/01/19removed

CPT code 0309T removed (01/01/19; terminated 1/1/18).

12/01/21revised

Policy title changed to 'Lumbar Spinal Fusion in Adults' and juvenile/adolescent scoliosis criteria removed.

01/01/22added

New CPT codes 22632 and 63052/63053 added (01/01/22) per coding updates.

09/02/22added

Medically necessary statement for revision surgery for implant/instrumentation failure added effective for dates of service on or after September 2, 2022.

12/01/23revised

Clarifying statement added that multiple-level lumbar spinal fusion is considered not medically necessary when the criteria are not met for all levels.

03/01/24revised

Reorganized criteria for recurrent (same level) disc herniation to call out rapidly progressive symptoms of motor loss, neurogenic claudication, or cauda equina syndrome as stand-alone criteria.

12/01/24annual_reviewLatest

Annual literature review through July 17, 2024 added; policy statements unchanged in this update.