Fusion · Spine

Posterior spinal arthrodesis for deformity correction spanning up to 6 vertebral segments, with or without application of a body cast.

Verified May 8, 2026 · 7 sources ↓

Medicare: $1,312.99
Total RVUs: 39.31
Global, days: 90
Region: Spine

Drawn from CMSAAPCMdclarityNervesHealthcareinspiredllc

Documentation requirements

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

Source · Editorial brief grounded in 7 cited references ↓

Explicit segment count — document every vertebral level included in the fusion construct by name or number
Confirmed posterior surgical approach; note patient positioning (prone) and incision location
Indication for deformity correction — primary diagnosis (e.g., scoliosis, kyphosis) with ICD-10 code tied to imaging findings
Description of any osteotomies performed, even though bundled, to support medical necessity and audit defense
Body cast application documented if performed, including type and extent
If co-surgery with modifier 62: both surgeons must dictate separate operative notes describing their distinct portions of the procedure
If modifier 22 is appended: quantify the additional work — unusual anatomy, prior surgery, revision complexity, or prolonged operative time with explanation

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 78 Unplanned return — related 79 Unrelated during global 80 Assistant surgeon AS PA/NP/CNS assistant

What this code covers

Source · Editorial summary grounded in 7 cited references ↓

CPT 22800 covers posterior arthrodesis performed to correct spinal deformity — scoliosis, kyphosis, or similar structural abnormalities — when the fusion spans up to 6 vertebral segments. The surgeon works from the posterior approach with the patient prone; any osteotomies required to achieve correction are bundled into this code and are not separately reportable. A body cast, if applied, is also included.

Segment count is the pivotal variable. If the fusion extends to 7–12 segments, report 22802. Thirteen or more segments maps to 22804. Reporting 22800 when the operative note documents more than 6 fused segments is the single most common upcoding flag for this code family. Count vertebral segments fused, not levels decompressed or instrumented — those are separate reportable services.

The 90-day global period swallows all routine post-op management through day 90. Unrelated E/M visits in that window require modifier 24. A staged or planned second procedure in the post-op period uses modifier 58. An unplanned return to the OR for a related complication (e.g., wound dehiscence requiring reoperation) takes modifier 78. Instrumentation codes (e.g., 22842 series) are separately reportable but modifier 62 does not apply to those add-ons — only to the primary arthrodesis 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	19.01
Practice expense RVU	14.54
Malpractice RVU	5.76
Total RVU	39.31
Medicare national rate	$1,312.99
Global period	90 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	$1,312.99
HOPD (APC 5116) Hospital outpatient department	$17,913.59
ASC (PI J8) Ambulatory surgical center (freestanding)	$13,488.33

Common denial reasons

The recurring reasons claims for CPT 22800 get rejected.

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

Segment count mismatch — operative note supports 22802 or 22804 but 22800 was billed, or vice versa
Missing or insufficient documentation of spinal deformity diagnosis; payer cannot confirm medical necessity without corroborating imaging or clinical findings
Bundling errors — osteotomy or posterior decompression billed separately when performed as part of the deformity correction construct
Modifier 62 appended to instrumentation add-on codes where it is not permitted; those codes require modifier 80 or AS for assistant-level participation
Global period violations — routine post-op E/M visits billed without modifier 24 during the 90-day global window
Lack of pre-operative conservative treatment documentation required by some payers before approving deformity surgery

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 7 cited references ↓

01How do I count vertebral segments for 22800 vs. 22802 vs. 22804?

Count the vertebral bodies actually incorporated into the fusion construct. Up to 6 = 22800. Seven through 12 = 22802. Thirteen or more = 22804. Decompressions or instrumented levels that are not fused do not count toward the segment total.

02Are osteotomies separately billable when performed during a 22800 procedure?

No. Osteotomies performed as part of the posterior deformity arthrodesis are bundled into 22800. Billing them separately triggers an NCCI edit. Document them in the operative note for medical necessity support, but do not add a separate CPT line.

03Can two surgeons each bill 22800 with modifier 62?

Yes, when two surgeons of different specialties each perform distinct parts of the procedure. Both append modifier 62 to 22800. Each surgeon must dictate a separate operative note describing their individual contribution. Modifier 62 cannot be appended to instrumentation add-on codes — use modifier 80 or AS for those if the co-surgeon participates.

04What happens if the patient needs a return trip to the OR during the 90-day global?

An unplanned return for a complication related to the original fusion (e.g., wound infection requiring washout) uses modifier 78. A planned staged procedure uses modifier 58. An unrelated surgery by the same physician in the global window uses modifier 79. Appending the wrong modifier is an audit trigger — do not invert 78 and 79.

05When is modifier 22 defensible on 22800?

Modifier 22 requires documentation of work substantially beyond the typical case — severe rigid deformity requiring extended correction time, prior failed fusion at the same levels, or significant anatomical distortion. The operative note must explain specifically why the case was harder, not just note a long operative time. Expect payer requests for records when modifier 22 is appended.

06Is a body cast separately billable in addition to 22800?

No. Cast application is included in 22800 per the code descriptor ('with or without cast'). Do not bill a separate casting code for the same session.

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 exact vertebral levels fused, surgical approach, patient positioning, any osteotomies performed, and whether a body cast was applied — all from the surgeon's dictation. That prevents the most common audit flag for this code family: a segment count in the operative note that doesn't match the CPT reported. If a co-surgeon participates, the scribe generates a distinct operative section for each surgeon's role, satisfying modifier 62 documentation requirements without a separate dictation session.

See how Mira captures CPT 22800 documentation