🦴 CPT 63091 — Vertebral Corpectomy (Vertebral Body Resection), Transperitoneal/Retroperitoneal Approach, Lower Thoracic/Lumbar/Sacral, Each Additional Segment
Quick Reference
wRVU: 2.95 | Global Period: ZZZ (bundled to primary) | Assistant Payable: Yes | Bilateral Indicator: 0 Rule: CPT 63091 is an add-on code and can never be billed as a standalone line item — it must always accompany 63090 on the same claim, same date of service, same surgeon. It is exempt from modifier -51 by CPT definition, is not subject to multiple-procedure payment reduction, and inherits the global period and any global-related edits from the primary procedure rather than carrying its own.
📋 Clinical Description
CPT 63091 describes resection of each vertebral body segment beyond the first when a surgeon performs a corpectomy in the lower thoracic, lumbar, or sacral spine through an anterior, transperitoneal, or retroperitoneal approach for excision of tumor or infectious lesion. The code always accompanies primary code 63090, which reports the first segment; 63091 is appended once for every additional contiguous or non-contiguous segment resected in the same operative session. Unlike 63085, which uses a transthoracic approach for thoracic-only pathology, 63091 is specific to the retroperitoneal or transperitoneal corridor used for lower spinal levels, and unlike 63101, which describes a posterolateral extracavitary approach, 63091 requires an anterior surgical window.
The procedure inherently includes decompression of the spinal cord, cauda equina, or nerve roots as the vertebral body is removed, distinguishing it from a simple diagnostic biopsy or partial debridement. Per CPT 2026 guidance carried forward from the 2018 definitional revision, thoracic and lumbar corpectomy must involve removal of at least one-third of the vertebral body to qualify for this code family; lesser bone removal is more appropriately captured by a decompression or laminectomy code rather than a corpectomy code. Costotransversectomy, when performed to gain access, is bundled into the corpectomy and is not separately reportable with 21610.
This procedure may be performed in the following clinical contexts:
- Primary or metastatic spinal tumor resection — most commonly for vertebral body destruction from metastatic disease (breast, lung, prostate, renal primaries) or primary bone tumors requiring anterior column decompression.
- Vertebral osteomyelitis or discitis debridement — infectious erosion of two or more contiguous vertebral bodies requiring anterior debridement and reconstruction, frequently paired with structural allograft or cage placement.
- Spinal tuberculosis (Pott’s disease) — multilevel granulomatous destruction of the thoracolumbar spine is a classic indication for a multi-segment anterior corpectomy.
- Combined anterior-posterior reconstruction — used when a circumferential fusion strategy requires anterior column resection at more than one level before posterior instrumentation is placed.
- Traumatic burst fracture with retropulsed fragment — occasionally reported when a comminuted fracture spans an additional adjacent segment requiring anterior decompression beyond the primary level.
🔬 Anatomical & Procedural Considerations
| Variant | Mechanism | Key Notes |
|---|---|---|
| Lumbar additional-segment corpectomy | The surgeon extends the retroperitoneal dissection cephalad or caudad to the primary level, mobilizes the great vessels and psoas, and removes the additional vertebral body with an osteotome, high-speed burr, or rongeur while protecting the exiting nerve roots. | Most commonly reported for two- or three-level metastatic disease of L1-L4; reconstruction typically follows with structural allograft, cage, or vascularized fibula spanning both resected levels. |
| Sacral additional-segment corpectomy | Because the sacral body is broader and more vascular, the additional segment resection often requires ligation of the middle sacral vessels and careful preservation of the sacral nerve roots contributing to bowel and bladder function. | Sacral corpectomy carries elevated bleeding and neurologic risk compared with lumbar levels, which is reflected in the documentation expectations for medical necessity and informed consent. |
| Lower thoracic (T11-T12) additional-segment corpectomy | The transperitoneal or retroperitoneal approach at the thoracolumbar junction requires mobilization of the diaphragmatic crus and careful segmental vessel ligation before the additional body is resected. | This level sits at the interface between the transthoracic-approach code family (63085-63086) and the transperitoneal/retroperitoneal family (63090-63091); the operative note’s stated approach, not simply the vertebral level, determines which family applies. |
Clinical Pearl
The single most common denial reason for 63091 is a missing or mismatched primary code — because it is an add-on code, claims editing software and most payers will reject 63091 outright if 63090 is not present on the same claim with the same date of service and rendering provider. Always confirm the operative note documents a distinct, separately identifiable additional vertebral body segment, not simply an extended decompression of the same body already counted toward 63090.
✅ Procedure Includes
- Bone resection of one additional vertebral body segment beyond the segment reported with 63090, performed through the same anterior surgical corridor.
- Decompression of the spinal cord, cauda equina, or nerve roots at the additional level as the vertebral body is removed.
- Hemostasis and management of epidural or paravertebral bleeding encountered at the additional segment.
- Discectomy of the disc space(s) contiguous with the additionally resected vertebral body.
- Costotransversectomy, when required for surgical access to the additional lower thoracic segment.
- Closure of the retroperitoneal or transperitoneal approach specific to that additional level.
❌ Excludes / Do Not Report Together
| Code | Description | Relationship |
|---|---|---|
| 63090 | Vertebral corpectomy, single segment, transperitoneal/retroperitoneal approach, lower thoracic, lumbar, or sacral | This is the mandatory primary code; 63091 cannot be billed without it appearing on the same claim and same operative date. |
| 63085 | Vertebral corpectomy, single segment, transthoracic approach, thoracic | Reports the same conceptual service through a different surgical corridor; the approach documented in the operative note, not the vertebral level alone, determines whether 63085/63086 or 63090/63091 applies. |
| 63101 | Vertebral corpectomy, single segment, lateral extracavitary approach, thoracic | A posterolateral rather than anterior approach; these code families are mutually exclusive for the same segment and same operative session. |
| 22214 | Osteotomy of spine, posterior or posterolateral approach, one vertebral segment, lumbar | Osteotomy reshapes existing bone for deformity correction rather than resecting the vertebral body for tumor or infection, so the two are not interchangeable, though both may appear on complex reconstructive claims. |
Bundling Alert
Because 63091 has a ZZZ global period, all global-period edits, evaluation-and-management bundling rules, and postoperative-period restrictions are governed entirely by 63090; auditors will scrutinize claims where 63091 appears with a primary code other than 63090, or where the additional segment cannot be independently verified in the operative note’s level-by-level description. NCCI edits also bundle corpectomy-adjacent discectomy and laminectomy codes at the same level into 63091 unless a distinct, separately documented procedure at a non-contiguous level supports modifier -59 or an X{EPSU} modifier.
🌳 Code Tree — Surgery: Spine (Vertebral Column)
CPT 63001-63308 Surgery: Spine and Spinal Cord — Vertebral Corpectomy and Related Procedures
│
├── 63081-63082 Vertebral Corpectomy, Anterior Approach (Cervical)
│ ├── 63081 Corpectomy, anterior approach, cervical, single segment
│ └── 63082 Corpectomy, anterior approach, cervical, each additional segment (add-on)
│
├── 63085-63086 Vertebral Corpectomy, Transthoracic Approach (Thoracic)
│ ├── 63085 Corpectomy, transthoracic approach, thoracic, single segment
│ └── 63086 Corpectomy, transthoracic approach, thoracic, each additional segment (add-on)
│
├── 63087-63091 Vertebral Corpectomy, Combined Thoracolumbar or Transperitoneal/Retroperitoneal Approach
│ ├── 63087 Corpectomy, combined thoracolumbar approach, lower thoracic or lumbar, single segment (Global: 090)
│ ├── 63088 Corpectomy, combined thoracolumbar approach, each additional segment (add-on) (Global: ZZZ)
│ ├── 63090 Corpectomy, transperitoneal/retroperitoneal approach, lower thoracic/lumbar/sacral, single segment (Global: 090)
│ ├── ▶▶ 63091 ◀◀ Corpectomy, transperitoneal/retroperitoneal approach, lower thoracic/lumbar/sacral, each additional segment ← YOU ARE HERE (Global: ZZZ)
│
├── 63101-63103 Vertebral Corpectomy, Lateral Extracavitary Approach (Thoracic/Lumbar)
│ ├── 63101 Corpectomy, lateral extracavitary approach, thoracic, single segment
│ └── 63102 Corpectomy, lateral extracavitary approach, lumbar or sacral, single segment
│
└── 22206-22226 Osteotomy of Spine (Deformity Correction — separate procedural family)
├── 22214 Osteotomy of spine, posterior/posterolateral approach, one segment, lumbar
└── 22216 Osteotomy of spine, posterior/posterolateral approach, each additional segment (add-on)💰 RVU & Reimbursement Profile
| Component | Value |
|---|---|
| Work RVU | 2.95 |
| Global Period | ZZZ — bundled to primary procedure 63090 |
| Bilateral Indicator | 0 — not applicable; spine is a midline structure |
| Assistant Surgeon | Payable, subject to documentation of surgical complexity |
| Co‑Surgeon | Payable when two surgeons of different specialties each perform a distinct part of a multi-segment anterior corpectomy |
| Team Surgery | Payable in select complex circumflex spine reconstructions requiring more than two surgeons |
| PC/TC Split | 0 — global surgical service, professional component only, no separate technical component |
| Modifier -51 Exempt | Yes — inherent to add-on code status |
| Anesthesia | General anesthesia; not separately billed by the surgeon |
Bilateral Billing Rules
🏷️ Modifier Reference
| Modifier | Name | When to Apply |
|---|---|---|
| -RT | Right Side | Not applicable — the vertebral column is a midline structure with no left/right distinction, so this modifier should never be appended to 63091. |
| -LT | Left Side | Not applicable for the same anatomic reason as -RT. |
| -50 | Bilateral | Not applicable — corpectomy is not a paired bilateral procedure. |
| -22 | Increased Procedural Services | Appropriate when the additional segment resection is significantly more complex than typical, such as extensive tumor invasion into adjacent structures, provided the operative note quantifies the added time and difficulty. |
| -62 | Two Surgeons | Reported by each surgeon when two surgeons of different specialties (e.g., a spine surgeon and a vascular or general surgeon for exposure) each perform a distinct portion of the additional-segment resection. |
| -66 | Surgical Team | Used in rare highly complex multilevel reconstructions requiring more than two surgeons of different specialties working concurrently. |
| -80 | Assistant Surgeon | Appended by a fully participating assistant surgeon who actively assists throughout the additional-segment resection. |
| -81 | Minimum Assistant Surgeon | Used when the assistant’s involvement is limited to a brief portion of the additional-segment procedure. |
| -82 | Assistant Surgeon (no qualified resident available) | Applied at teaching facilities when a qualified resident was not available to assist and a non-resident assistant surgeon was required instead. |
| -AS | PA/NP/CNS Assistant at Surgery | Reported when a physician assistant, nurse practitioner, or clinical nurse specialist serves as the assistant for the additional-segment resection. |
| -25 | Significant E/M | Not typically applicable to 63091 itself since it is an intraoperative add-on code with no separate E/M component of its own. |
| -24 | Unrelated E/M | Not typically applicable for the same reason as -25; any unrelated E/M would be billed against the primary procedure’s global period, not against 63091 directly. |
| -51 | Multiple Procedures | Not applicable — 63091 is exempt from modifier -51 by definition as an add-on code. |
| -59 | Distinct Service | Reserved for the rare situation where an additional, non-contiguous corpectomy segment must be distinguished from a bundled adjacent procedure code during NCCI edit resolution. |
| -76 | Repeat Procedure, Same Physician | Applicable if a second, separately staged additional-segment corpectomy is performed by the same surgeon on a later date within the same global period. |
🩺 Common ICD‑10‑CM Pairings
Primary Diagnosis Group
| ICD‑10 | Description | HCC? | Notes |
|---|---|---|---|
| C41.2 | Malignant neoplasm of vertebral column | Yes | Reported when the additional segment is resected for a primary malignant bone tumor of the spine; supports medical necessity for tumor-indication corpectomy. |
| C79.51 | Secondary malignant neoplasm of bone | Yes | The most frequently paired code in practice, since metastatic disease to the vertebral body is the leading indication for multi-segment corpectomy. |
| M46.24 | Osteomyelitis of vertebra, lumbar region | No | Supports an infectious-lesion indication when the additional segment resected is lumbar. |
| M46.25 | Osteomyelitis of vertebra, thoracolumbar region | No | Used when infection spans the thoracolumbar junction, a common scenario for multi-segment involvement. |
| M46.28 | Osteomyelitis of vertebra, sacral and sacrococcygeal region | No | Applies when the additional segment resected for infection is at the sacral level. |
Secondary Group
| ICD‑10 | Description | HCC? | Notes |
|---|---|---|---|
| G95.20 | Unspecified cord compression | No | Documents the neurologic indication for decompression performed concurrently with the additional segment’s resection. |
| M54.16 | Radiculopathy, lumbar region | No | Supports nerve root decompression documented at the additional lumbar level. |
Etiology / Complication
| ICD‑10 | Description | HCC? | Notes |
|---|---|---|---|
| M54.17 | Radiculopathy, lumbosacral region | No | Applicable when nerve root symptoms span the lumbosacral junction corresponding to the additional segment resected. |
| M84.58XA | Pathological fracture in neoplastic disease, other specified site, initial encounter for fracture | Yes | Supports cases where tumor-related vertebral collapse at the additional segment necessitated corpectomy rather than elective resection alone. |
Coding Specificity Reminder
Always confirm the operative note explicitly documents which vertebral levels correspond to the primary versus additional segment, and select the ICD-10-CM code at the highest available specificity for laterality, region, and encounter type; do not default to an unspecified-region osteomyelitis or neoplasm code when the documentation supports a more specific vertebral level.
🏥 MS‑DRG Considerations
CPT 63091 does not independently drive MS-DRG assignment because it is an add-on code with no ICD-10-PCS weight beyond what its paired PCS code contributes to the record. The encounter’s MS-DRG is instead determined by the combination of the primary corpectomy’s PCS code, any concurrent fusion or instrumentation procedures, and the presence of qualifying CC/MCC diagnoses such as sepsis from vertebral osteomyelitis or cord compression with myelopathy. Most uncomplicated multi-segment corpectomy admissions for tumor or infection group to MS-DRG 028-030 (Spinal Procedures), while cases combined with instrumented fusion typically shift to the 459-462 or 471-473 fusion-related DRG families depending on approach and CC/MCC status.
🔧 ICD‑10‑PCS Equivalents
| PCS Code | Full Description | Modality |
|---|---|---|
| 0PB40ZZ | Excision of Thoracic Vertebra, Open Approach | Open |
| 0PT40ZZ | Resection of Thoracic Vertebra, Open Approach | Open |
| 0QB00ZZ | Excision of Lumbar Vertebra, Open Approach | Open |
| 0QB10ZZ | Excision of Sacrum, Open Approach | Open |
PCS Character Analysis
| Position | Character | Value | Definition |
|---|---|---|---|
| 1 | Section | 0 | Medical and Surgical section, covering all procedures performed on or within a body part using instrumentation. |
| 2 | Body System | P or Q | Upper Bones (P) is used for the thoracic vertebra body part, while Lower Bones (Q) is used for the lumbar vertebra and sacrum. |
| 3 | Root Operation | B or T | Excision (B) is used when only part of the vertebral body is taken out, while Resection (T) is used when the entire body part is removed, matching CPT’s own “partial or complete” language. |
| 4 | Body Part | 4, 0, or 1 | The specific vertebral level resected — thoracic vertebra, lumbar vertebra, or sacrum — must match the level documented for the additional segment. |
| 5 | Approach | 0 | Open approach reflects the transperitoneal or retroperitoneal surgical corridor required for this CPT code family. |
| 6 | Device | Z | No device value is used because the corpectomy resection itself does not involve implantation; any structural graft or cage placed afterward is coded separately. |
| 7 | Qualifier | Z | No qualifier applies to a straightforward corpectomy resection at the additional segment. |
Root Operation Comparison
- Excision (B) and Resection (T) are the two root operations that map to CPT’s “partial or complete” corpectomy language; the operative note’s stated extent of vertebral body removal determines which root operation is coded, not the CPT descriptor alone.
- Because 63091 always represents a second (or subsequent) segment, coders must assign a distinct PCS code line for each additional vertebral level resected, using the body part value that matches that specific level.
📝 Coding Examples
Example 1
Clinical Scenario: A 61-year-old with metastatic renal cell carcinoma presents with progressive lower-extremity weakness from epidural cord compression at L2-L3. The surgeon performs a retroperitoneal approach with corpectomy of L2 and L3, including decompression of the cauda equina, followed by structural cage placement and posterior instrumented fusion in the same session.
| Field | Code | Rationale |
|---|---|---|
| CPT | 63090, 63091 | 63090 reports the L2 corpectomy as the primary single segment, and 63091 is appended once for the additional L3 segment resected in the same session. |
| PDx | C79.51 | Secondary malignant neoplasm of bone accurately captures the metastatic renal cell carcinoma driving the vertebral destruction and cord compression. |
Note
Because posterior instrumented fusion was performed in the same session, coders must separately capture the fusion and instrumentation codes and corresponding PCS values; failing to do so understates the case’s true resource intensity and can distort MS-DRG assignment.
Example 2
Clinical Scenario: A 47-year-old with Pott’s disease of the spine undergoes a combined thoracolumbar debridement spanning T12 and L1 for extensive infectious destruction with abscess formation.
| Field | Code | Rationale |
|---|---|---|
| CPT 1 | 63090 | Reports the L1 corpectomy as the primary single segment through the transperitoneal/retroperitoneal approach. |
| CPT 2 | 63091 | Reports the additional T12 segment resected in the same operative session through the same approach. |
| PDx | M46.25 | Osteomyelitis of the thoracolumbar region precisely reflects the documented Pott’s disease location spanning both resected levels. |
Warning
Confirm the operative note explicitly states a transperitoneal or retroperitoneal approach at the T12 level rather than a transthoracic approach; if the surgeon instead entered through the chest wall for the T12 segment, 63086 rather than 63091 would be the correct add-on code, and mixing approach families on the same claim is a frequent audit trigger.
Example 3
Clinical Scenario: A 55-year-old with a burst fracture of L4 sustained in a motor vehicle collision develops progressive cauda equina symptoms. The surgeon performs an anterior retroperitoneal corpectomy of L4, and intraoperative findings reveal comminution extending into the adjacent L5 body, requiring resection of that additional segment as well before reconstruction with a structural cage.
| Field | Code | Rationale |
|---|---|---|
| CPT | 63090, 63091 | The L4 corpectomy is reported as the primary segment, and the additional L5 segment resected due to intraoperative findings of extended comminution is reported with 63091. |
| PDx | M84.58XA | Pathological fracture in neoplastic disease is not the correct etiology here; a traumatic burst fracture code from the S32 category with appropriate seventh-character extension should instead be selected, illustrating the importance of matching the etiology code family to the true clinical mechanism rather than defaulting to a template code. |
Global period reminder
Because 63091 carries a ZZZ global period tied entirely to 63090’s 90-day global period, all postoperative visits and any related complications addressed within that 90-day window are bundled into the global surgical package and are not separately billable without an appropriate modifier such as -78 or -79.
⚠️ Common Coding Pitfalls
- Pitfall 1: Billing 63091 without 63090 present on the same claim. Because 63091 is an add-on code, nearly every payer’s claims-editing system will automatically deny it as a standalone line item, resulting in avoidable rework and delayed reimbursement.
- Pitfall 2: Appending laterality modifiers -RT, -LT, or -50. The vertebral column is a midline structure, and applying a laterality modifier to 63091 signals a fundamental misunderstanding of the anatomy that most payer edit systems will reject outright.
- Pitfall 3: Confusing approach families. Selecting 63091 when the operative note actually documents a transthoracic (63085/63086) or lateral extracavitary (63101/63102) approach at the additional segment misrepresents the surgical technique and can trigger a post-payment audit.
- Pitfall 4: Failing to separately code concurrent fusion and instrumentation. Corpectomy and fusion are frequently performed together, but they require distinct CPT and PCS codes; omitting the fusion codes understates case complexity and can misalign MS-DRG assignment.
- Pitfall 5: Defaulting to an unspecified-region ICD-10-CM code when the operative and pathology documentation supports a more specific vertebral level, region, or encounter type, which understates clinical specificity and can affect HCC risk capture.
- Pitfall 6: Overlooking assistant surgeon or co-surgeon modifiers on genuinely complex multi-segment cases. Given the elevated wRVU and bleeding risk of sacral and multilevel resections, failing to append -62, -66, -80, -81, or -82 when supported by documentation leaves legitimate reimbursement unclaimed.
📎 Sources
AMA CPT 2026 Professional Edition — Surgery: Spine (Vertebral Column) section.¹ CMS Medicare Physician Fee Schedule, 2026 Final Rule.² CMS National Correct Coding Initiative Policy Manual, 2026.³ Noridian Medicare Global Surgery Policy — JE Part B.⁴ ICD-10-PCS 2026 Reference Manual.⁵ ICD-10-CM 2026 Official Code Set.⁶1 American Medical Association, CPT 2026 Professional Edition, Surgery: Spine (Vertebral Column), codes 63081-63103. 2 Centers for Medicare & Medicaid Services, Medicare Physician Fee Schedule Final Rule for Calendar Year 2026. 3 Centers for Medicare & Medicaid Services, National Correct Coding Initiative Policy Manual, Chapter 6 and Chapter 12, effective 2026. 4 Noridian Healthcare Solutions, Global Surgery — JE Part B, Medicare Administrative Contractor policy reference. 5 Centers for Medicare & Medicaid Services, ICD-10-PCS 2026 Reference Manual, Body System P (Upper Bones) and Q (Lower Bones). 6 Centers for Medicare & Medicaid Services / National Center for Health Statistics, ICD-10-CM 2026 Official Code Set.Sources listed above correspond to superscript citations throughout this note. Verify all Medicare payment figures against your current CMS PFS Lookup tool and applicable MAC LCD prior to claim submission. Please use the latest AAPC/AHIMA Coding Books to verify each code within this note.