Question 1

Does Medicare cover spinal fusion surgery?

Accepted Answer

Yes. Medicare covers lumbar spinal fusion (CPT 22630 and related codes) when medically necessary — typically for spondylolisthesis, instability after laminectomy, or recurrent disc herniation. Coverage requires documentation of failed conservative treatment. Spinal fusion is primarily performed inpatient due to its complexity and recovery requirements. Hardware costs (pedicle screws, interbody cages) are bundled into the DRG payment and should not be billed separately to the patient.

Question 2

Is spinal fusion covered as inpatient or outpatient?

Accepted Answer

Spinal fusion is almost always performed inpatient. CMS covers it under Part A with the DRG 460 bundled payment ($25,746 to the hospital in 2026 for posterior lumbar interbody fusion). You pay the Part A deductible ($1,736 in 2026). Simple 1-level fusions may occasionally be performed outpatient at an HOPD, triggering the Part B 20% coinsurance instead — which can be substantially higher on a $15,800 facility fee. Confirm the setting with your surgeon before scheduling.

Question 3

What does Medicare pay for lumbar spinal fusion and what do I owe?

Accepted Answer

For inpatient lumbar spinal fusion (DRG 460 in 2026), Medicare pays the hospital $25,746 as a bundled payment covering all facility costs — surgery, implants, nursing, OR time. You pay the $1,736 Part A deductible. The surgeon bills separately under Part B (CPT 22630 approx. $1,128 nationally; your share: $226). Anesthesia ($900–$1,600) adds another $180–$320. Your total out-of-pocket without Medigap: approximately $2,100–$2,300. With Medigap Plan G: $283 (the Part B deductible).

Question 4

Why does this calculator show a different amount than Medicare.gov's cost estimate?

Accepted Answer

This calculator may show a higher number than Medicare.gov's "Patient Pays (average)" for several reasons: (1) Deductible timing — this calculator applies the $283 Part B annual deductible if it has not yet been met; Medicare.gov's average assumes many patients have already satisfied theirs. (2) Anesthesia — Medicare.gov's estimate covers the facility fee and surgeon only; anesthesia is billed separately and is included in this calculator. (3) Location adjustment — surgeon fees are adjusted by your region's Geographic Practice Cost Index (GPCI); in high-cost cities like Seattle or New York, surgeon fees run 30–50% above the national rate. Facility fees (HOPD and ASC) are nationally fixed by CMS and should match Medicare.gov exactly. (4) Patient mix — Medicare.gov's "Patient Pays" average includes Medigap enrollees who pay $0 coinsurance, which pulls the reported average below what uninsured Original Medicare patients typically pay.

Cost Component	Medicare-Approved Amount	Your Share (20%)
Surgeon Fee — Lumbar Spinal Fusion (CPT 22630)	$1,510	$302
Hospital Outpatient (HOPD) Facility Fee	$27,721	$5,544
Ambulatory Surgery Center (ASC) Facility Fee	$20,858	$4,172
Inpatient Hospital (DRG 451) — Medicare Pays	$23,507	$1,736 Part A deductible
Anesthesia (estimated)	$900–$1,600	20% of approved

Medicare Lumbar Spinal Fusion Cost 2026 | Out-of-Pocket Estimator

2026 Medicare Cost Summary — Lumbar Spinal Fusion (CPT 22630)

What Medicare Pays

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