Fusion · Spine

Add-on code for partial or complete removal of an additional thoracic or lumbar vertebral body and adjacent disc material via a lateral extracavitary approach (LECA), performed at a second vertebral level during the same operative session.

Verified May 8, 2026 · 5 sources ↓

Medicare: $262.87
Work RVU: 4.7
Global, days
Region: Spine

Drawn from CMSAAPCCgsmedicareNovitas

Documentation requirements

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

Source · Editorial brief grounded in 5 cited references ↓

Identify the specific vertebral level(s) addressed by 63103 by name (e.g., T10, L2) distinct from the primary procedure level
Document the lateral extracavitary approach explicitly — 'standard approach' flags audits
State the extent of vertebral body removal (partial vs. complete) and whether disc material at the additional level was resected
Record the clinical indication driving multi-level corpectomy (fracture, tumor, deformity) with corresponding ICD-10 diagnosis linked to the additional level
Confirm instrumentation or stabilization performed at the additional level, if applicable, to support separately reportable fusion/instrumentation add-on codes

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 62 Co-surgeons 80 Assistant surgeon AS PA/NP/CNS assistant

What this code covers

Source · Editorial summary grounded in 5 cited references ↓

63103 is a ZZZ add-on code — it is never billed alone. It reports the lateral extracavitary corpectomy work performed at each additional thoracic or lumbar vertebral level beyond the primary level captured by the base procedure. The lateral extracavitary approach provides access to the anterior and middle spinal columns without requiring a separate thoracotomy or retroperitoneal dissection, making it the approach of choice when decompression and stabilization need to happen simultaneously. Indications typically include vertebral fracture, primary or metastatic tumor, and fixed deformity.

Because 63103 carries a ZZZ global, it inherits the global period of the primary procedure to which it is appended. Modifier 51 is not appropriate here — add-on codes are exempt. The operative note must identify the specific vertebral level(s) addressed by 63103 separately from the level(s) covered by the primary code. Failure to distinguish levels in the operative report is the most common reason auditors collapse multiple billed levels into a single allowed unit.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU vs. total RVU

The work RVU (4.7) is the surgeon's own effort — the figure physician pay and productivity targets are built on. The total RVU (7.87) adds practice overhead and malpractice, and is what drives the Medicare payment below.

Work RVU	4.7
Practice expense RVU	1.58
Malpractice RVU	1.59
Total RVU	7.87
Medicare national rate	$262.87
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	$262.87

Common denial reasons

The recurring reasons claims for CPT 63103 get rejected.

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

Operative note fails to distinguish the additional level from the primary level, causing payer to bundle 63103 into the primary code
Modifier 51 applied to an add-on code — add-ons are exempt and the modifier triggers incorrect reimbursement logic
ICD-10 diagnosis code does not map to the additional vertebral level billed, creating a CPT-ICD mismatch denial
Units billed exceed the number of additional levels documented in the operative report
Primary base procedure not billed on the same claim, leaving 63103 without a host code and triggering automatic rejection

Frequently asked questions

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

01Can 63103 be billed without a primary procedure code?

No. 63103 is a ZZZ add-on code and must be reported alongside a primary base corpectomy code reflecting the first level. Submitting 63103 alone will result in an automatic claim rejection — there is no standalone reimbursement pathway.

02How many times can 63103 be billed on a single operative encounter?

Once per additional vertebral level addressed via the lateral extracavitary approach. If three vertebral levels are resected total, the primary code covers the first level and 63103 is listed for each subsequent level. The number of units billed must match the number of additional levels documented in the operative report.

03Does modifier 51 apply to 63103?

No. Add-on codes are explicitly exempt from modifier 51. Appending modifier 51 to 63103 is incorrect and can disrupt payment calculation. List the primary procedure first; 63103 follows without modifier 51.

04What is the global period for 63103?

ZZZ. This means 63103 has no independent global period — it adopts the global period of whatever primary procedure it is appended to. Post-op follow-up obligations are governed entirely by the base code.

05Is 63103 payable in an ASC or hospital outpatient setting?

Lateral extracavitary multi-level corpectomy is an inpatient-level procedure. There are no HOPD or ASC facility payment rates assigned to 63103 in CMS datasets. This procedure is billed under the inpatient DRG system for facility reimbursement.

06Can two surgeons each bill 63103 for a co-surgery arrangement?

Yes, when two surgeons perform distinct portions of the procedure. Each bills the appropriate primary code and 63103 with modifier 62. Both operative reports must document the individual surgeon's specific contribution at each level.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira Scribe

Mira's AI scribe captures the approach name (lateral extracavitary), each vertebral level addressed, whether removal was partial or complete, and the clinical indication for each level from dictation. This prevents the most common audit failure: operative notes that document a second corpectomy level but don't name it, giving payers grounds to deny 63103 as unbundled from the primary code.

See how Mira captures CPT 63103 documentation