Fusion · Spine

Anterior spinal arthrodesis for deformity correction spanning eight or more vertebral segments, with or without cast application.

Verified May 8, 2026 · 6 sources ↓

Medicare: $1,970.99
Total RVUs: 59.01
Global, days: 90
Region: Spine

Drawn from CMSSrsHealthcareinspiredllcFastrvu

Documentation requirements

What must appear in the operative or office note to support the claim.

Source · Editorial brief grounded in 6 cited references ↓

Exact vertebral segment count (8 or more) with named levels clearly identified in the operative report
Confirmed anterior surgical approach documented — not just 'anterior approach' generically but the specific corridor used
Diagnosis establishing spinal deformity (e.g., scoliosis, kyphosis) with supporting imaging linked to medical necessity
If modifier 22 claimed, narrative explaining why intraoperative complexity exceeded the typical procedure
If modifier 62 used for co-surgeons, each operative note must document that surgeon's distinct operative contribution
Instrumentation implanted listed by type to support separately reported 22840–22847 add-on codes
Body cast application documented if performed, to confirm inclusion within the primary code rather than separate billing

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 51 Multiple procedures 62 Co-surgeons 78 Unplanned return — related 79 Unrelated during global 80 Assistant surgeon AS PA/NP/CNS assistant

What this code covers

Source · Editorial summary grounded in 6 cited references ↓

CPT 22812 covers anterior fusion of eight or more vertebral segments performed specifically to address spinal deformity — most commonly severe scoliosis or kyphosis. The surgeon accesses the spine via an anterior approach, prepares the intervertebral spaces (including minimal discectomy as needed), and achieves arthrodesis across the full extent of the deformity. A body cast may be applied as part of the same operative session without separate billing.

This is the highest-segment tier in the anterior deformity arthrodesis family. Its siblings are 22806 (2–3 segments) and 22808 (4–7 segments). Selecting among them requires an exact segment count from the operative report — not an estimate. The 90-day global period encompasses all routine postoperative management; anything unrelated billed in that window requires modifier 24 or 79.

Instrumentation codes (22840–22847) are separately reportable alongside 22812 per CMS LCD guidance. When 22812 is combined with another definitive procedure such as an osteotomy or laminectomy in the same session, modifier 51 applies to the secondary procedure. Two surgeons each performing distinct portions of the anterior approach may each report 22812 with modifier 62, provided both function as co-primary surgeons throughout.

RVU & reimbursement

Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	33.39
Practice expense RVU	18.5
Malpractice RVU	7.12
Total RVU	59.01
Medicare national rate	$1,970.99
Global period	90 days

Payment by site of service

Medicare pays different rates by setting. HOPD typically pays substantially more than ASC for the same procedure.

Source · CMS OPPS Addendum B·ASC HCPCS payment rates·2026

Setting	Medicare rate (national)
Office (PFS non-facility) Procedure performed in physician's office	$1,970.99
HOPD (APC 5116) Hospital outpatient department	$17,913.59
ASC (PI J8) Ambulatory surgical center (freestanding)	$13,933.19

Common denial reasons

The recurring reasons claims for CPT 22812 get rejected.

Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓

Segment count in the op note doesn't clearly reach 8 — payer downcodes to 22808 or 22806
Medical necessity not established: missing pre-op imaging, Cobb angle measurements, or failed conservative treatment documentation
Instrumentation add-on codes (22840–22847) denied when operative report doesn't specify implant type and location
Modifier 62 rejected because one surgeon's note doesn't describe distinct operative work separate from the co-surgeon
Bundling errors when decompression codes are billed at the same level without appropriate modifier or separate medical necessity documentation
Global period violation — routine post-op visit billed without modifier 24 or 25 within the 90-day window

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 6 cited references ↓

01How is 22812 different from 22808?

Segment count is the only distinction. 22808 covers 4–7 anterior deformity segments; 22812 covers 8 or more. The operative report must support the exact count — payers will downcode to 22808 if the documented level span falls short of 8.

02Can instrumentation codes be billed with 22812?

Yes. CPT codes 22840–22847 are separately reportable alongside 22812 per CMS LCD guidance for spinal fusion. Each instrumentation code requires its own operative documentation specifying implant type and the vertebral levels instrumented.

03When is modifier 62 appropriate for 22812?

Modifier 62 applies when two surgeons function as co-primaries, each performing distinct portions of the anterior approach and fusion. Both must append modifier 62 to 22812, and each operative note must document their individual operative work — not just reference the other surgeon's note.

04Does the 90-day global period affect post-op spine rehabilitation billing?

Routine office visits and dressing changes in the 90 days after surgery are included in the global and cannot be billed separately. Unrelated E/M services require modifier 24; a new problem addressed at a post-op visit requires modifier 25. Physical therapy billed by a separate therapist is not affected by the surgeon's global.

05Is modifier 51 needed when 22812 is performed with an osteotomy in the same session?

Yes. When 22812 is combined with a separately reportable definitive procedure like a posterior column osteotomy (e.g., 22206), modifier 51 applies to the secondary procedure. The primary code — whichever carries the higher RVU — is billed without modifier 51.

06What ICD-10 diagnoses support medical necessity for 22812?

Common supporting diagnoses include M41.xx (scoliosis), M40.xx (kyphosis/lordosis), and Q67.5 (congenital deformity of spine). Documentation must link the deformity severity — typically Cobb angle measurements and imaging — to the decision for surgical correction across 8 or more segments.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

Mira's AI scribe captures the exact vertebral levels fused (e.g., T5 through L2), the anterior approach corridor, segment-by-segment graft and instrumentation details, and any intraoperative complexity that supports modifier 22. It also flags when a co-surgeon is present so the note reflects each surgeon's distinct operative contribution for modifier 62. This prevents the most common 22812 denial: a segment count that reads as fewer than 8 on audit, or a co-surgeon claim rejected for insufficient role documentation.

See how Mira captures CPT 22812 documentation