Fusion · Spine

Add-on code for each additional cervical interspace fused via anterior interbody approach during the same session as the primary procedure (22551), including disc space preparation, discectomy, osteophytectomy, and spinal cord or nerve root decompression below C2.

Verified May 8, 2026 · 5 sources ↓

Medicare: $353.05
Total RVUs: 10.57
Global, days
Region: Spine

Drawn from CMSMedtronicAAPCFastrvu

Documentation requirements

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

Source · Editorial brief grounded in 5 cited references ↓

Operative note must identify each additional cervical interspace treated below C2 by vertebral level (e.g., C5-6, C6-7) — not just 'additional level'.
Confirm that disc space preparation, discectomy, osteophytectomy, and decompression were performed at each additional interspace billed.
Document medical necessity for multi-level fusion with supporting imaging (MRI or CT) and clinical findings for each level.
Biological or graft material used at each interspace must be specified; use of biologics requires additional documentation per CMS LCD requirements.
Operative note must be signed and dated by the performing surgeon; illegible or unsigned notes are a top audit failure point.
If co-surgery (modifier 62) is billed, each surgeon's operative report must describe their distinct intraoperative contribution.

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 76 Repeat, same physician 77 Repeat, another physician 80 Assistant surgeon AS PA/NP/CNS assistant LT Left side RT Right side

What this code covers

Source · Editorial summary grounded in 5 cited references ↓

22552 is a ZZZ add-on code — never billed alone. It reports each additional cervical interspace treated below C2 via anterior interbody arthrodesis in the same operative session as 22551. The work includes disc space preparation, discectomy, osteophytectomy, and decompression of the spinal cord and/or nerve roots at each additional level. Modifier 51 is not appended to add-on codes; payers expecting it should be corrected.

The code was introduced in 2011 to bundle what had previously required reporting 63075 (discectomy/decompression) paired with 22554-51 (arthrodesis). CMS drove the bundling because those two codes were reported together more than 90% of the time. Understanding that history matters for audits: operative notes written under the old convention — describing decompression and fusion as separate steps — may trigger scrutiny if they don't reflect the all-in-one nature of 22552.

Co-surgery (modifier 62) is common in complex cervical cases involving a neurosurgeon and an orthopedic spine surgeon splitting distinct portions of the procedure. If a PA or second surgeon assists rather than co-operates, use modifier 80 or AS instead. Billing modifier 62 and 80 simultaneously on the same claim is a known denial trigger — the two are mutually exclusive for the same surgeon on the same code.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	6.34
Practice expense RVU	2.13
Malpractice RVU	2.1
Total RVU	10.57
Medicare national rate	$353.05
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	$353.05

Common denial reasons

The recurring reasons claims for CPT 22552 get rejected.

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

22552 billed without a primary 22551 on the same claim — add-on codes require the parent code.
Modifier 51 incorrectly appended to 22552; it is an add-on code and modifier 51 does not apply.
Modifier 62 and modifier 80 submitted together on the same procedure — payers reject this combination as mutually exclusive.
Operative note fails to specify which vertebral levels were treated at each additional interspace, leaving medical necessity unsupported.
Units exceed the number of additional interspaces documented; MUE limits apply and overcoding triggers automated edits.
Lack of supporting imaging or clinical documentation establishing multi-level pathology at each fused interspace.

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 5 cited references ↓

01Can 22552 be billed without 22551 on the same claim?

No. 22552 is a ZZZ add-on code and cannot stand alone. It must be reported with 22551 as the parent code on the same claim for the same operative session.

02How many units of 22552 can be billed in a single session?

One unit per additional interspace treated below C2. A two-level ACDF (e.g., C4-5 and C5-6) uses 22551 once and 22552 once. A three-level ACDF uses 22551 once and 22552 twice. CMS MUE limits apply; units must match the number of additional levels documented in the operative note.

03Should modifier 51 be added to 22552?

No. Add-on codes are exempt from modifier 51. Appending it is a known denial trigger with many payers. Remove it from your charge template if it's being auto-populated.

04Can two surgeons each bill 22552 with modifier 62?

Yes, if each surgeon performed distinct portions of the procedure at the additional interspace and each documents their specific intraoperative role. Both surgeons bill 22552-62. Do not also bill modifier 80 on the same code — 62 and 80 are mutually exclusive.

05What is the global period for 22552 and how does it affect post-op billing?

22552 carries a ZZZ global period, meaning it inherits the global period of the primary procedure (22551), which has a 90-day global. Post-op care billed within 90 days for related conditions requires modifier 24 on E/M codes or modifier 78 for unplanned related returns to the OR.

06Why was 22552 created, and does that history affect how auditors review it?

CMS requested the bundled code because 63075 and 22554 were reported together more than 90% of the time. Auditors may flag older-style operative notes that describe decompression and fusion as separate steps, since the current code is all-inclusive. The note should reflect a single integrated procedure, not sequential unbundled steps.

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 specific vertebral levels treated (e.g., C5-6 and C6-7), confirms discectomy, osteophytectomy, and decompression were performed at each additional interspace, and notes graft or biologic material used per level. That level-by-level detail is what prevents denials for unsupported units and audit flags for operative notes that only reference 'additional levels' without anatomic specificity.

See how Mira captures CPT 22552 documentation