Fusion · Spine

Add-on code for posterior interbody lumbar arthrodesis at each additional interspace beyond the first, including any laminectomy or discectomy needed to prepare the interspace.

Verified May 8, 2026 · 6 sources ↓

Medicare: $287.58
Total RVUs: 8.61
Global, days
Region: Spine

Drawn from CMSHealthcareinspiredllcAAPC

Documentation requirements

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

Source · Editorial brief grounded in 6 cited references ↓

Specify each interspace fused by name (e.g., L4-L5, L5-S1) — level-by-level documentation is required to support each unit of 22632.
Confirm the surgical technique as posterior interbody (PLIF or TLIF) for each additional interspace, not posterolateral or combined.
Document that any laminectomy or discectomy performed was for interspace preparation, not independent decompression, if decompression codes are not separately reported.
Identify the primary arthrodesis code reported (22630, 22612, or 22633) to establish the valid pairing with 22632 per NCCI policy.
Record implant type and graft material used at each interspace (autograft, allograft, cage, etc.) — payers and auditors cross-check implant billing against operative detail.
Note whether fluoroscopy or intraoperative imaging was used; do not bill imaging guidance separately when it is integral to the fusion procedure.

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 51 Multiple procedures 59 Distinct service 62 Co-surgeons 78 Unplanned return — related 79 Unrelated during global 80 Assistant surgeon AS PA/NP/CNS assistant XS Separate structure

What this code covers

Source · Editorial summary grounded in 6 cited references ↓

22632 is an add-on code (AOC) for posterior interbody lumbar arthrodesis performed at each additional interspace. It is never reported alone. The primary procedure at the first interspace is reported with 22630 (posterior interbody, single level), 22612 (posterior or posterolateral, lumbar), or 22633 (combined posterior/posterolateral with posterior interbody). For every interspace beyond the first using the same posterior interbody technique, append 22632. The code encompasses any laminectomy or discectomy performed solely to prepare the interspace for fusion — not for standalone decompression.

Because 22632 carries a ZZZ global period, it inherits the global period of the primary procedure it accompanies. Do not report modifier 51 with 22632 — it is an AOC by CPT definition and modifier 51 does not apply. NCCI policy is explicit: report one primary code for the first interspace and 22632 for each additional interspace, whether those interspaces are contiguous or not. If the interspaces span two different spinal regions through the same incision, check NCCI guidance on primary code selection before stacking add-ons.

As of July 2023, CMS resolved NCCI PTP bundling conflicts between 22630/22632/22633/22634 and the laminectomy add-on codes 63052 and 63053 — those edits were deleted effective October 1, 2023. If you have claims from July 1–September 30, 2023 denied under that edit, your MAC should have auto-adjusted them; if not, use the appeals process.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	5.09
Practice expense RVU	1.73
Malpractice RVU	1.79
Total RVU	8.61
Medicare national rate	$287.58
Global period	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	$287.58

Common denial reasons

The recurring reasons claims for CPT 22632 get rejected.

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

Reporting 22632 without a valid primary code (22630, 22612, or 22633) — it cannot stand alone.
Appending modifier 51 to 22632, which is an add-on code and exempt from multiple-procedure reductions.
Billing 22632 with 22614 at the same session without recognizing that 22614 covers posterior/posterolateral additional interspaces and 22632 covers posterior interbody — technique mismatch causes bundling errors.
Operative note does not name each interspace level, leaving auditors unable to verify medical necessity for more than one unit.
Failing to distinguish between laminectomy for interspace preparation (included in 22632) and laminectomy for decompression (separately reportable under appropriate conditions) — underdocumentation causes denial of decompression codes or flags overcoding.

Frequently asked questions

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

01Which primary codes can be reported with 22632?

Per NCCI policy, 22632 is valid only with 22612, 22630, or 22633 as the primary code. Pairing it with any other primary arthrodesis code is incorrect and will be denied.

02Can 22632 be reported with modifier 51?

No. 22632 is an add-on code. Add-on codes are exempt from modifier 51 by CPT convention. Appending modifier 51 will trigger a rejection or incorrect payment reduction.

03How does 22632 differ from 22614?

22614 is the add-on for posterior or posterolateral technique additional interspaces; 22632 is the add-on specifically for posterior interbody technique. The technique documented in the operative note must match the code — mixing them is a bundling error.

04What happened with the NCCI edits between 22632 and 63052/63053?

CMS implemented bypassable PTP edits between these codes on July 1, 2023, then deleted those edits effective October 1, 2023. Claims from that window denied for lack of a modifier should have been auto-adjusted by the MAC. If yours were not, file an appeal.

05How many units of 22632 can be reported in one session?

One unit per additional interspace. If you fuse three interspaces by posterior interbody technique, report the primary code once and 22632 twice — one unit for each interspace beyond the first. Each unit must be supported by level-specific documentation.

06Is the laminectomy or discectomy performed to prepare the interspace billable separately when 22632 is reported?

Not when the laminectomy or discectomy is performed solely to gain access and prepare the interspace for fusion. That work is included in 22632. A separate laminectomy or discectomy code is only supportable if the decompression was clinically necessary and distinct from interspace preparation — and the operative note must make that distinction explicit.

07What is the global period for 22632?

ZZZ — meaning it has no independent global period. It inherits the global period of the primary procedure it accompanies. Post-op follow-up billing is governed by the primary code's global.

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 surgical approach, each interspace fused by anatomic level, the interbody technique used (PLIF vs. TLIF), graft and implant details, and whether laminectomy or discectomy was performed for interspace preparation versus decompression. That distinction prevents the most common audit flag on multi-level fusion notes: an operative report that doesn't differentiate preparatory discectomy from standalone decompression, triggering either denial of 22632 units or clawback of separately billed decompression codes.

See how Mira captures CPT 22632 documentation