Fusion · Spine

Add-on code for inserting an interbody biomechanical device (e.g., synthetic cage or mesh) with integral anterior anchoring instrumentation into an intervertebral disc space, performed alongside interbody arthrodesis, reported once per interspace.

Verified May 8, 2026 · 4 sources ↓

Medicare: $228.80
Total RVUs: 6.85
Global, days
Region: Spine

Drawn from CMSIsass

Documentation requirements

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

Source · Editorial brief grounded in 4 cited references ↓

Specify the interspace level(s) treated (e.g., L4-L5, L5-S1) — one unit per interspace
Identify the device by type (synthetic cage, mesh, PEEK spacer, etc.) in the operative note
Document whether integral anchoring instrumentation was used and that it is part of the cage construct, not a separate stabilization construct
If anterior instrumentation beyond cage anchoring was placed, document its distinct purpose (stabilization, not anchoring) to support separate billing with modifier 59 or XU
Confirm interbody arthrodesis was performed at the same interspace — 22853 requires an arthrodesis primary code
Record the surgical approach (ALIF, TLIF, PLIF, XLIF, etc.) by name; generic 'standard approach' language flags audits

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

59 Distinct service 62 Co-surgeons 80 Assistant surgeon AS PA/NP/CNS assistant LT Left side RT Right side

What this code covers

Source · Editorial summary grounded in 4 cited references ↓

22853 is an add-on code billed per interspace for placement of an interbody biomechanical device — synthetic cage, mesh, or similar construct — into the disc space during spinal fusion. It replaced the deleted code 22851 effective January 1, 2017. The ZZZ global period means it inherits the global period of the primary arthrodesis code it accompanies; it is never billed alone.

The integral anterior instrumentation used solely to anchor the device to the disc space is bundled into 22853 — do not separately report 22845–22847 for that anchoring hardware. However, if additional anterior instrumentation (plate, rod construct) is placed for stabilization independent of anchoring the cage, that instrumentation may be separately reported with modifier 59 or XU to bypass the NCCI PTP edit.

22853 applies specifically to disc-space defects in conjunction with interbody arthrodesis. For corpectomy defects, use 22854. For biomechanical device insertion without arthrodesis, use 22859. Multi-level cases report 22853 for each qualifying interspace.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	4.14
Practice expense RVU	1.38
Malpractice RVU	1.33
Total RVU	6.85
Medicare national rate	$228.80
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	$228.80

Common denial reasons

The recurring reasons claims for CPT 22853 get rejected.

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

Billed without a primary arthrodesis code — 22853 is add-on only and cannot stand alone
Anterior instrumentation codes (22845–22847) billed alongside 22853 for integral cage-anchoring hardware, triggering NCCI PTP bundling denial
Units exceed the number of documented interspaces treated — MUE limits apply per interspace
22853 used for corpectomy defect instead of 22854, resulting in code-to-diagnosis mismatch
Missing device documentation — payers require identification of the specific biomechanical device inserted

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 4 cited references ↓

01Is 22853 ever billed without a primary arthrodesis code?

No. 22853 is an add-on code that must accompany a primary interbody arthrodesis procedure. Submitting it without a qualifying primary code will result in a denial.

02Can I bill 22845 or 22847 for the screws or flanges that hold the cage in place?

No. Anterior instrumentation integral to anchoring the cage is bundled into 22853. Separately reporting 22845–22847 for that hardware is a misuse of those codes per the NCCI Policy Manual. Only anterior instrumentation placed for independent stabilization — a separate plate or rod construct — can be billed separately, with modifier 59 or XU.

03How many units of 22853 can be reported in one operative session?

One unit per interspace treated. If fusion is performed at L4-L5 and L5-S1 with a cage at each level, report 22853 twice. MUE limits apply; units must match documented interspace count.

04What is the difference between 22853, 22854, and 22859?

22853 is for disc-space defects with concurrent arthrodesis. 22854 is for corpectomy (vertebral body resection) defects with arthrodesis. 22859 is for biomechanical device insertion without arthrodesis, whether in a disc space or vertebral body defect.

05What global period applies to 22853?

ZZZ. As an add-on code, 22853 has no independent global period — it assumes the global period of the primary procedure it is reported with.

06Which specialties most commonly bill 22853?

Per CMS Physician Utilization File data, Orthopedic Surgery and Neurosurgery account for the large majority of 22853 volume, with Vascular Surgery appearing in the top billers as well.

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 device type and name, each interspace level treated, the surgical approach, and whether anterior instrumentation served as cage anchoring versus a separate stabilization construct. That distinction directly prevents the most common 22853 denial: anterior instrumentation codes bundled out because the note didn't differentiate anchoring hardware from an independent plate or rod construct.

See how Mira captures CPT 22853 documentation