Intercalary algrft compl

CPT code 20934 covers the placement of an intercalary bone allograft, which is a section of donor bone used to bridge a gap in a patient's bone after tumor removal or trauma. This specialized graft procedure helps restore structural bone integrity when a segment of bone has been removed.

Showing rates for

National Average

Base Medicare rate

$729.09

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

PE RVU (NF)

6.89

MP RVU

2.65

Total RVU

22.54

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Document the specific allograft source, tissue bank, dimensions, and lot number in the operative report, as these details support medical necessity and may be required for implant registries
Impact: Prevents denials for insufficient documentation; tissue bank documentation can reduce audit risk by 40-50%
Bill for the allograft tissue separately using the appropriate HCPCS code (such as C1763 for connective tissue) in addition to the surgical placement code 20934
Impact: The allograft device itself can add $3,000-$15,000 to total reimbursement depending on size and type; this is separate from the surgical placement fee
Do not unbundle 20934 from major bone reconstruction codes; verify CCI edits before billing with other bone graft codes on the same anatomical site
Impact: Prevents automatic denials and recoupment; improper unbundling can result in 100% denial of the secondary code
Consider modifier 22 for cases requiring custom allograft shaping, extensive soft tissue reconstruction, or revision of failed previous grafts, with detailed documentation of extra time and complexity
Impact: Can increase reimbursement by $145-$218 (20-30%) when properly documented with time comparisons and complexity justification
Verify that internal fixation devices (plates, screws, rods) used to stabilize the allograft are billed separately and not bundled into the 20934 code
Impact: Hardware implants can add $2,000-$8,000 to facility reimbursement; ensure proper itemization on UB-04 forms
For Medicare patients, confirm that the allograft tissue meets FDA and CMS requirements for human tissue products to avoid post-payment audits

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 20934 in 2025?

The 2025 Medicare national average reimbursement for CPT 20934 is $729.09 for both facility and non-facility settings. This is based on 22.54 total RVUs multiplied by the 2025 conversion factor of $32.3465. Actual payment may vary based on geographic locality adjustments.

Can CPT 20934 be billed with a tumor resection code on the same date of service?

Generally no, CPT 20934 is considered bundled into major bone tumor resection procedures when performed at the same anatomical site during the same session. However, if performed at a distinctly separate site or as a staged procedure, it may be separately billable with appropriate modifier 59 and documentation supporting the separate nature of the service.

What is the difference between CPT 20930 and 20934 for bone allografts?

CPT 20930 covers morselized allograft placement (small bone chips or particulate), while CPT 20934 specifically covers intercalary structural allograft (complete bone segment). The intercalary allograft bridges a gap between two intact bone ends and provides structural support, whereas morselized grafts fill cavities or supplement fusion procedures. Code 20934 has higher RVUs (22.54 vs lower values for 20930) reflecting the increased complexity.

How should I bill for the allograft tissue material itself versus the surgical placement?

The allograft tissue is billed separately from CPT 20934 using appropriate HCPCS codes such as C1763 (connective tissue allograft) or facility-specific implant codes. CPT 20934 covers only the physician's work of placing the allograft. The tissue product is typically billed by the facility with detailed documentation of tissue bank source, lot number, and cost.

What documentation is required to support medical necessity for CPT 20934?

Required documentation includes operative reports detailing the bone defect size and location, pathology reports or imaging confirming the indication (tumor, trauma, infection), allograft source and dimensions, tissue bank certification, surgical technique description, and clinical justification for choosing structural allograft over alternatives. Pre-operative imaging demonstrating the skeletal defect is essential for audit defense.

What are the work RVUs for CPT code 20934?

CPT 20934 has 13.0 work RVUs in the 2025 Medicare Physician Fee Schedule. Combined with 6.89 practice expense RVUs and 2.65 malpractice RVUs, the total is 22.54 RVUs, making this a high-intensity surgical procedure reflecting the complexity of intercalary allograft placement.

Which medical specialties most commonly bill CPT code 20934?

CPT 20934 is primarily billed by orthopedic surgeons specializing in orthopedic oncology, trauma surgery, and complex bone reconstruction. Musculoskeletal oncology surgeons frequently use this code for limb salvage procedures following tumor resection. The procedure requires specialized training in bone grafting techniques and is typically performed in hospital settings with access to tissue banks.