Fusion · Spine

Anterior discectomy with osteotomy of a single thoracic vertebral segment, performed via an anterior approach.

Verified May 8, 2026 · 8 sources ↓

Medicare: $1,774.26
Total RVUs: 53.12
Global, days: 90
Region: Spine

Drawn from CMSAAOSAAPC

Documentation requirements

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

Source · Editorial brief grounded in 8 cited references ↓

Specify the exact thoracic level(s) by vertebral number (e.g., T6-T7) — 'mid-thoracic' alone is insufficient for audit defense.
Confirm anterior approach in the operative note by name; generic language like 'standard approach' triggers audit flags.
Document the osteotomy type performed (e.g., Smith-Petersen, pedicle subtraction, vertebral column resection) and the degree of correction achieved.
Record the indication driving the anterior osteotomy — deformity, tumor, pseudarthrosis, post-traumatic kyphosis — with supporting imaging correlation.
If modifier 22 is appended, document estimated additional operative time and the specific factors (e.g., prior fusion mass, severe kyphosis, intraoperative hemorrhage) that made the case substantially more extensive.
Note neuromonitoring use and any intraoperative changes, as SSEP/MEP interpretation is separately reportable and must not be double-billed by the operating surgeon.
For staged procedures, document the intent to return for posterior instrumentation in the initial operative note to support modifier 58 on the second surgery.

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 24 Unrelated E/M during global 25 Significant separate E/M 51 Multiple procedures 57 Decision for surgery 58 Staged or related 59 Distinct service 62 Co-surgeons 78 Unplanned return — related 79 Unrelated during global 80 Assistant surgeon XS Separate structure

What this code covers

Source · Editorial summary grounded in 8 cited references ↓

CPT 22222 covers an anterior thoracic vertebral osteotomy at a single segment — a high-complexity spinal procedure requiring anterior access to the thoracic spine, bony resection or wedge osteotomy of the vertebral body, and typically concurrent or staged reconstruction. The code is used when deformity correction, tumor resection, or instability at a thoracic level requires anterior column work beyond standard discectomy. The 90-day global period means all routine post-op care from the day before surgery through day 90 is bundled. Any E/M visit during that window for an unrelated problem requires modifier 24; a significant separately identifiable E/M on the same day as surgery requires modifier 25.

When additional vertebral segments are addressed anteriorly in the same session, each additional thoracic segment is reported with the companion add-on code 22226. Because 22226 is an add-on, modifier 51 is not appended to it. If the surgeon performs both anterior and posterior work at the same sitting — a common deformity correction strategy — confirm NCCI PTP edits before combining anterior osteotomy codes with posterior instrumentation or fusion codes; a modifier 59 or XS may be required to bypass applicable bundling edits depending on the specific combination.

Modifier 22 is appropriate when the procedure is substantially more work than typical — severe rigidity, prior failed surgery, or extensive bleeding documented in the operative note — but the operative report must quantify the additional time and complexity. Do not append modifier 22 simply because the case was difficult without objective supporting documentation.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	22.51
Practice expense RVU	21.11
Malpractice RVU	9.5
Total RVU	53.12
Medicare national rate	$1,774.26
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	$1,774.26
HOPD (APC 5114) Hospital outpatient department	$7,413.38
ASC (PI G2) Ambulatory surgical center (freestanding)	$3,695.53

Common denial reasons

The recurring reasons claims for CPT 22222 get rejected.

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

Missing or vague approach documentation — operative notes that omit 'anterior' or describe only 'standard thoracic access' are vulnerable to medical necessity denial.
Incorrect segment count billed — reporting 22222 with multiple units instead of pairing it with add-on code 22226 for each additional thoracic segment.
Modifier 22 appended without adequate operative note support — payers routinely downcode or deny increased procedural service claims lacking documented extra time and complexity.
Bundling conflicts when anterior osteotomy and posterior fusion codes are submitted together without appropriate modifier 59 or XS to establish distinct procedural services.
Global period violations — billing a routine post-op visit within the 90-day window without modifier 24, causing denial of the E/M service.
Insufficient ICD-10 specificity — deformity or instability diagnoses not lateralized or graded to the level the payer's LCD requires for anterior thoracic osteotomy.

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 8 cited references ↓

01When do I use 22222 versus 22226?

22222 is the primary code for the first anterior thoracic osteotomy segment. 22226 is the add-on for each additional thoracic segment addressed in the same session. Report 22226 without modifier 51 — it's an add-on code and the multiple-procedure reduction doesn't apply.

02Can 22222 be billed with posterior fusion or instrumentation codes on the same day?

It can be, but check NCCI PTP edits for the specific code combination before submitting. Many anterior-posterior same-day spine pairings require modifier 59 or XS to bypass bundling. Failure to append the correct modifier results in the secondary code being denied without appeal rights.

03What modifier applies if the surgeon returns to the OR within the 90-day global for a related complication?

Modifier 78 applies for an unplanned return to the OR for a complication related to the original procedure during the global period. Modifier 79 applies if the return procedure is unrelated. Do not invert these — payers audit modifier 78 versus 79 usage on spine cases.

04Is modifier 22 defensible on a thoracic osteotomy, and what does the note need to say?

Yes, but the operative note must be explicit. Document the specific complicating factor (e.g., prior multilevel fusion mass, significant intraoperative blood loss requiring repositioning, severe fixed kyphosis requiring extended bone work), estimated extra time beyond typical, and why a higher-level code didn't exist. Payers deny modifier 22 claims that simply state 'complex case' without objective detail.

05Does the 90-day global cover inpatient hospital management after a thoracic osteotomy?

Yes. Routine inpatient post-op visits by the operating surgeon are bundled into the global. However, critical care services (99291–99292) for a deteriorating patient post-operatively may be separately reportable — document that the critical care was unrelated to routine surgical recovery and required separate medical decision-making.

06How does site of service affect reimbursement for 22222?

22222 is virtually always performed in a hospital inpatient or HOPD setting given the complexity and typical need for thoracic access. The HOPD and ASC facility payments differ significantly — see the Site of Service comparison table on this page. The physician's professional fee is subject to the site-of-service differential under the CMS Physician Fee Schedule 2026.

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 approach (anterior transthoracic, retropleural, or thoracoscopic), the specific thoracic level by number, the osteotomy technique by name, degrees of correction achieved, and any factors extending operative time beyond typical — prior hardware, fusion mass, or intraoperative hemorrhage. That last detail is what backs a modifier 22 claim and prevents payer downcoding on audit.

See how Mira captures CPT 22222 documentation