CPT 22585 Spinal Fusion Reimbursement & Policy | OpenPayer

Summary & Overview

CPT 22585: Spinal Fusion, Additional Vertebral Segment

CPT code 22585 represents arthrodesis (spinal fusion) performed on an additional vertebral segment following prior fusion of one or more vertebrae in the neck or back. The procedure involves removal of disk material and permanent joining of the adjacent vertebrae to address refractory pain from herniated or bulging discs and other degenerative spinal conditions. Nationally, this code matters because spinal fusion procedures are high-cost, frequently reviewed services with significant implications for utilization management, prior authorization, and bundled payment models.

Key payers referenced in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for CPT code 22585, payer coverage considerations, typical sites of service, and common modifiers used with this code. The publication also summarizes expected claim line attributes and the policy environment that affects approval and reimbursement for additional-level spinal fusion services. This resource is intended to help billing, coding, and policy teams understand where CPT code 22585 fits within surgical spine care and payer administration at a national level.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 22585spinal fusionarthrodesissurgical billingorthopedicsneurosurgeryambulatory surgeryinpatient surgeryprocedure coding

Billing Code Overview

CPT code 22585 describes an arthrodesis (spinal fusion) procedure performed on an additional vertebral segment after a fusion has already been performed on one or more vertebrae in the cervical or thoracolumbar spine. The procedure includes removal of disk material and permanent joining of adjacent vertebrae to relieve persistent pain from a herniated or bulging disk or other spinal condition.

Service type: Spinal fusion / arthrodesis of an additional vertebral segment
Typical site of service: Hospital inpatient or outpatient surgical center, and may occur in some ambulatory surgical settings depending on clinical complexity and payer policies

Clinical & Coding Specifications

Clinical Context

A 58-year-old patient with chronic cervical radiculopathy due to multilevel degenerative disc disease and a herniated nucleus pulposus presents after six months of failed conservative care (physical therapy, epidural steroid injections, and analgesics). Imaging (MRI and CT) demonstrates focal disc collapse and foraminal stenosis at C5-C6 and C6-C7 with nerve root compression. The spine surgeon schedules an anterior cervical discectomy and fusion (ACDF) procedure that includes removal of disc material and placement of interbody graft and instrumentation to arthrodese an additional vertebral level after an initial level fusion, consistent with the additional-level fusion descriptor in 22585.

Clinical workflow:

Preoperative evaluation by the spine surgeon and anesthesia, including medical optimization and informed consent.
Pre-op imaging review and surgical planning for multi-level anterior cervical discectomy and fusion with possible decompression and instrumentation.
Intraoperative procedure: general endotracheal anesthesia, anterior cervical approach, discectomy with removal of disc material, preparation of endplates, placement of interbody graft or cage, and anterior plating or other fixation to achieve arthrodesis of the additional vertebral level described by 22585.
Postoperative care in PACU, inpatient monitoring for neurological status and wound, pain control, and outpatient follow-up with imaging to document fusion progression.

Coding Specifications

CPT 22554: Anterior Cervical Spinal Fusion

CPT-22548-CERVICAL-SPINE-ARTHRODESIS-ANTERIOR-TRANSORAL

CPT 22548: Cervical Spine Arthrodesis (Anterior/Transoral)

CPT-22558-ANTERIOR-LUMBAR-SPINAL-FUSION

CPT 22558: Anterior Lumbar Spinal Fusion

CPT-22586-PRESACRAL-INTERBODY-SPINAL-FUSION-LOWER-LUMBAR

CPT 22586: Presacral Interbody Spinal Fusion for Lower Lumbar Disc Herniation

CPT-22556-THORACIC-SPINAL-FUSION-LATERAL-TRANSTHORACIC

CPT 22556: Thoracic Spinal Fusion via Lateral Transthoracic Approach

CPT-22552-ANTERIOR-CERVICAL-ARTHRODESIS-ADDITIONAL-LEVEL

CPT 22552: Anterior Cervical Arthrodesis, Additional Level

22551-ARTHRODESIS-ANTERIOR-INTERBODY-INCLUDING-DISC-SPACE

CPT 22551: Anterior Interbody Arthrodesis for Cervical Spine Stabilization

Taxonomy Code	Specialty	Notes
`2084P0800X`	Orthopedic Surgery, Spine	Orthopedic spine surgeons commonly perform cervical and thoracic fusions.
`2086S0102X`	Neurological Surgery	Neurosurgeons perform complex spinal arthrodesis and decompression.
`2086S0212X`	Orthopedic Surgery	General orthopedic surgeon with spine focus; performs spinal fusions and instrumentation.
`208D00000X`	Physical Medicine & Rehabilitation	Manages pre- and post-operative rehabilitation and functional assessments.
`207R00000X`	Family Medicine (Hospitalist)	Provides perioperative medical management and optimization.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`M50.20`	Cervical disc disorder with radiculopathy, unspecified cervical region	Radiculopathy due to cervical disc disease is a common indication for cervical discectomy and fusion such as `22585`.
`M50.11`	Cervical disc disorder with radiculopathy, C5-C6	Level-specific cervical radiculopathy indicating surgical target for fusion and decompression.
`M50.12`	Cervical disc disorder with radiculopathy, C6-C7	Supports multi-level fusion involving additional vertebral levels described by `22585`.
`M47.12`	Other spondylosis with radiculopathy, cervical region	Degenerative spondylosis causing foraminal stenosis and nerve compression treated with fusion.
`M51.26`	Other intervertebral disc displacement, lumbar region with radiculopathy	Lumbar disc displacement may require similar arthrodesis techniques; included for completeness when fusion is performed in lumbar spine.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`22845`	Anterior instrumentation; 2 to 3 vertebral segments	Often billed when anterior plating or instrumentation spans the fused levels performed with `22585`.
`22551`	Cervical or thoracic arthrodesis, anterior; single interspace	May be billed for the primary level fusion when `22585` is used to report an additional level.
`63075`	Laminectomy, facetectomy and foraminotomy (unilateral or bilateral) with decompression of spinal cord/nerve root	Used when additional posterior decompression is performed in conjunction with fusion.
`20930`	Allograft, morselized or placement of osteopromotive material	Used when graft material is placed to facilitate fusion at the arthrodesis site.
`22590`	Arthrodesis, posterior interbody technique, thoracic, each additional interspace	Used for additional posterior interbody fusion levels when combined approaches are performed.

`22`	Increased procedural services	Use when the work, time, or intensity for `22585` is substantially greater than typical and is documented.
`24`	Unrelated E/M service by the same physician during a postoperative period	Use if an unrelated evaluation is performed during the global period following `22585`.
`25`	Significant, separately identifiable E/M service on the same day	Use when a distinct E/M visit is provided the same day as `22585` and clearly documented.
`50`	Bilateral procedure	Use if the procedure is reported bilaterally and payer allows bilateral reporting for spine procedures.
`51`	Multiple procedures	Use when `22585` is billed with other distinct procedures on the same day per payer rules.
`52`	Reduced services	Use when `22585` was partially performed or discontinued with documentation of reduced service.
`53`	Discontinued procedure	Use when the procedure is started but discontinued for reasons documented, before completion of `22585`.
`59`	Distinct procedural service	Use to indicate a distinct procedural service when bundling edits would otherwise deny concurrent procedures.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing distinct portions of `22585`.
`63`	Procedure performed on infants less than 4 kg	Use when patient meets weight criteria and the payer recognizes this modifier.
`78`	Unplanned return to the operating room for a related procedure during the postoperative period	Use when a complication requires return to OR related to the index `22585`.
`79`	Unrelated procedure or service during the postoperative period	Use when an unrelated surgical procedure occurs during the global period for `22585`.
`80`	Assistant surgeon	Use when a surgical assistant participates in `22585` and the payer requires reporting.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery	Use when an advanced practice clinician serves as the assistant at surgery for `22585`.

OpenPayer