Spine Surgery Billing 2026

Kyphoplasty Global Periods, Implant Billing & Modifier Rules

Every missed add-on level costs you real money: 22634 pays $432.54 and 22632 pays $287.58 at 2026 Medicare national rates, and a documented second interspace that never reaches the claim is gone. Add the global period mistakes and misfiled implant claims below and the leak gets expensive. The coding here isn't uniquely difficult. It's just unforgiving when you get it wrong.

Spine Surgery CPT Codes: What You're Actually Billing

Spine surgery CPT coding breaks into several distinct families: decompression (laminectomy, discectomy), fusion (anterior, posterior, lateral interbody), instrumentation (pedicle screws, rods, cages), and standalone procedures like foraminotomy and kyphoplasty. The mistake most practices make isn't choosing the wrong primary code; it's failing to code every billable component.

Each spinal level is billable separately in the fusion family. A two-level TLIF isn't just CPT 22633. It's 22633 for the first level plus 22634 (add-on code) for the second. Forget the add-on and you've written off the add-on payment on every case.

Kyphoplasty Global Period: 22513, 22514 and 22515

Percutaneous vertebral augmentation (kyphoplasty) is 22513 for the thoracic spine and 22514 for the lumbar spine, and both carry a 10-day global period in the 2026 Medicare fee schedule. Add-on code 22515 for each additional vertebral body follows its primary code. Open spine procedures like 63030 and 22551 carry 90-day globals.

Global Period Rules for Spine Surgery: The 90-Day Window

Almost every open spinal procedure carries a 90-day global period. That means the surgeon's fee covers routine post-op care (office visits, wound checks, medication management related to the surgery) for 90 days post-operation. Billing a standard E/M during that window triggers an automatic denial from virtually every payer.

CPT 63030 (lumbar decompression of one interspace) has a 90-day global period. So do 63075, 22551 and the fusion codes 22630, 22633 and 22558. Add-on codes such as 63035 and 22634 carry a ZZZ global, which means they follow the global period of the primary code.

But "routine" is doing a lot of work in that definition. Here's where practices lose money: they don't bill anything during the global window, including services that are legitimately separable. A new problem unrelated to the spine surgery? That's modifier 24 territory. A complication requiring a return to the OR? That's modifier 78. An unrelated procedure in the global window? Modifier 79.

Modifier 22: When to Use It and When Payers Push Back

Modifier 22 signals increased complexity beyond what the base code describes. In spine surgery, it's legitimately applicable in cases of severe morbid obesity, significant scar tissue from prior surgeries, extensive bleeding requiring transfusion during the procedure, or unusually prolonged operative time with documented medical necessity.

When you append modifier 22, you're telling the payer the procedure took substantially more work than usual. The claim goes to manual review, which adds delay. Most payers want documentation that includes: the operative report with time noted, anesthesia records, a letter of medical necessity explaining the complexity, and comparison to the standard CPT code description. Without all four, the extra payment doesn't materialize.

Payers that pay an adjustment for modifier 22 set their own percentage, and many pay nothing when the documentation is thin. Treat it as a documented-complexity request, not a revenue plan.

Spinal Implant Billing: Facility vs. Physician Claim

This trips up more practices than almost anything else in spine billing. The physician's professional claim does not bill implants. Hardware (cages, pedicle screws, rods, expandable interbody devices, bone graft substitutes) is a facility-side cost billed by the hospital or ASC on the UB-04, not by the surgeon on the CMS-1500.

On the facility claim, implants are reported as charges under revenue code 278 (orthopedic implants) or 276 (medical/surgical supplies) depending on the item category. For ASCs, CMS publishes a separate pass-through list for devices not packaged into the procedure's APC payment. If the device qualifies for pass-through, the facility gets separate payment; if it doesn't, the cost is bundled into the APC rate.

Prior Authorization for Spine Surgery: What Payers Actually Want

Commercial payers require prior authorization for virtually all elective spine surgery. The threshold that triggers the auth requirement is almost universally any procedure involving fusion, instrumentation, or implant placement. Decompression-only procedures (laminectomy, discectomy, foraminotomy) sometimes skip the PA requirement with certain payers, but confirm this payer-by-payer before assuming.

A spine surgery auth request that gets approved quickly includes:

• Documented conservative treatment failure (many payers look for six weeks or more), physical therapy notes, injection records, chiropractic visits with response documentation
• MRI or CT confirming structural pathology correlating to the patient's symptoms
• Neurological exam findings consistent with the imaging (radiculopathy, myelopathy, instability)
• Specific ICD-10 codes that map precisely to the planned procedure (M47.816 for spondylosis with radiculopathy, M51.16 for lumbar disc degeneration with radiculopathy)
• The proposed CPT codes with levels specified, a vague "lumbar fusion" auth won't cover a two-level TLIF with instrumentation

Auth expirations are a major revenue leak in spine practices. Authorization windows vary by payer. If the case gets rescheduled past the expiration date, you're billing without a valid auth and the claim is denied on that basis. Track expiration dates in your scheduling system. Treat an auth expiration the same way you'd treat an expired implant lot number: something you can't let slip past without catching.

Common Spine Surgery Denials and How to Fight Them

Denial patterns in spine billing are remarkably consistent across payers:

Medical necessity denials are the most common, The appeal has to go back to the clinical record and demonstrate that conservative care was genuinely tried and failed, that the imaging matches the clinical presentation, and that the procedure selected is supported by peer-reviewed literature for the specific diagnosis. Generic appeals don't move these. A letter from the operating surgeon that addresses each of the payer's criteria specifically does.

Global period billing errors generate the second-largest denial volume. Usually this is unbundling: a follow-up visit billed without a modifier, or a steroid injection during the global window filed without modifier 79. The fix is billing system audits that flag any claim during a patient's 90-day global window before it goes out the door.

Multi-level undercoding isn't technically a denial; it's a payment shortfall. But many spine practices don't catch it until a billing audit surfaces the pattern. Quarterly chart-to-claim audits on a sample of surgical cases will find this quickly.

OIG Audit Exposure: What Spine Practices Need to Watch

Reviews of spine surgery claims tend to focus on two patterns: (1) billing for fusion procedures when medical necessity for fusion over decompression-alone wasn't established, and (2) upcoding procedure complexity through modifier 22 without adequate documentation.

Multi-level fusion cases are an obvious audit target because the payment is high and the documentation has to support every level. RAC reviews generally look back three years, and contractors can extrapolate from a sample. As an illustration (not a finding), if a sample shows a 25% error rate and the practice billed $800,000 a year in Medicare spine procedures, extrapolating over three years puts $600,000 of payments in question before any adjustment for the claims that were billed correctly.

The defensive posture that holds up under audit: operative notes that document time, complexity, findings, and the medical decision that led to the procedure chosen. A 12-minute operative note for a three-level fusion with instrumentation won't survive scrutiny. A detailed note that explains what was found intraoperatively, why each level was addressed, and what complications or complexity affected operative time will.

If any of those risk areas sound familiar, a compliance audit against your last 90 days of spine claims will tell you exactly where the exposure is before a payer finds it. Practices billing spine alongside general ortho volume often do better with a team that specializes in both, see our orthopedic billing services.

See how Rcmaxis handles the full scope of Spine Surgery billing on our Spine Surgery billing services page.

Frequently Asked Questions About Spine Surgery Billing 2026

What is the global period for kyphoplasty?

Percutaneous vertebral augmentation (kyphoplasty) is 22513 for the thoracic spine and 22514 for the lumbar spine, and both carry a 10-day global period in the 2026 Medicare fee schedule. Add-on code 22515 for each additional vertebral body follows its primary code. Open spine procedures like 63030 and 22551 carry 90-day globals.

What is the global period for CPT 63030 and spinal fusion?

CPT 63030 (lumbar decompression of one interspace) has a 90-day global period. So do 63075, 22551 and the fusion codes 22630, 22633 and 22558. Add-on codes such as 63035 and 22634 carry a ZZZ global, which means they follow the global period of the primary code.

Which code reports pedicle screw instrumentation?

Posterior segmental instrumentation is 22842 for 3 to 6 vertebral segments, 22843 for 7 to 12 and 22844 for 13 or more. 22840 is non-segmental instrumentation. These are add-on codes with a ZZZ global, reported with the fusion code.

What CPT codes are used for lumbar spinal fusion?

Lumbar interbody fusion uses CPT 22630 (PLIF) or 22558 (ALIF) for the primary level, with 22632/22585 for each additional level. Posterior instrumentation is billed separately with 22840 (non-segmental) or 22842 to 22844 (segmental, by number of segments).

How does the 90-day global period affect spine surgery billing?

Most spine surgeries carry a 90-day global period. E/M visits, injections, and physical therapy during that window are typically bundled, billing them separately triggers automatic denials unless modifier 24 (unrelated E/M) or modifier 79 (unrelated procedure) applies.

Can you bill for spinal implants separately from the surgery CPT code?

Yes. Spinal hardware (cages, pedicle screws, rods, plates) is billed as pass-through costs (revenue code 278 or 276) on facility claims. Physician claims don't bill implants separately; the facility absorbs and bills the hardware independently.