CPT 21387Surgery

Opn tx orbit fx combined

CPT code 21387 covers open surgical repair of multiple orbital fractures (the bones surrounding the eye socket) that require combined approaches. This is complex facial trauma surgery to restore the eye socket structure after severe injury.

Showing rates for

National Average

Base Medicare rate

$750.76

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

10.11

PE RVU (NF)

11.23

MP RVU

1.87

Total RVU

23.21

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

NCCI bundling edits

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Billing tips

Document all orbital walls involved in the fracture and repair (floor, medial, lateral, roof) with specific anatomical detail to justify the 'combined' designation versus simpler codes
Impact: Prevents downcoding to 21385 or 21386, protecting $200-300 in reimbursement per case
Specify implant materials used (titanium mesh, porous polyethylene, absorbable plates) with catalogue numbers and dimensions in operative report
Impact: Supports medical necessity and allows separate billing for implants; implant costs can range $500-2,000
When performing bilateral repairs, use modifier 50 rather than billing two line items with LT/RT modifiers
Impact: Ensures proper 150% payment ($1,126.14) versus risk of second side denial or 50% payment
For combined zygomatic-orbital repairs, separately document orbital component versus zygomatic component to bill both 21387 and 21365 with modifier 51 when appropriate
Impact: Can capture additional $400-500 when both procedures medically necessary and documented
Bill same-day CT imaging (70480-70482) with modifier 59 if performed intraoperatively for navigation or fracture assessment
Impact: Captures additional $150-400 for imaging when medically necessary and distinct
Use modifier 22 only when operative time exceeds typical by 25%+ and document specific complicating factors like severe comminution, prior surgery, or anatomical anomalies
Impact: Successful modifier 22 claims can increase payment by $150-375 but require strong documentation

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Frequently asked questions

What is the difference between CPT 21387 and 21385 for orbital fracture repair?

CPT 21387 is for combined/complex orbital fracture repairs involving multiple walls or requiring multiple surgical approaches, while 21385 covers simpler single orbital floor or wall repairs. Code 21387 has higher reimbursement ($750.76 vs approximately $600) reflecting the increased complexity and surgical time required for multi-wall reconstructions.

How much does Medicare pay for CPT code 21387 in 2025?

Medicare pays $750.76 for CPT 21387 in 2025 based on the national average non-facility rate. The code has a total RVU value of 23.21 (10.11 work RVU, 11.23 practice expense RVU, 1.87 malpractice RVU) multiplied by the 2025 conversion factor of 32.3465.

Can you bill CPT 21387 bilaterally with modifier 50?

Yes, modifier 50 is appropriate when performing bilateral orbital fracture repairs during the same operative session. This increases total reimbursement to 150% of the allowed amount ($1,126.14 for Medicare), though you must document fractures and medical necessity for repair in both orbits with imaging and clinical findings.

What modifiers are commonly used with CPT 21387?

Common modifiers include: 50 (bilateral procedure), LT/RT (laterality), 51 (multiple procedures), 22 (increased procedural services for unusual complexity), 62 (co-surgeons), and 78 (return to OR during postoperative period). Modifier selection depends on the specific clinical scenario and operative details.

What documentation is required to bill CPT 21387 successfully?

Required documentation includes pre-operative CT showing multi-wall fractures, operative report detailing each orbital wall addressed and surgical approaches used, implant specifications, fracture reduction technique, clinical examination findings (enophthalmos, diplopia, EOM deficits), and a clear statement of medical necessity explaining why combined approach was required.

How many RVUs is CPT code 21387 worth in 2025?

CPT 21387 has 23.21 total RVUs in 2025, consisting of 10.11 work RVUs, 11.23 practice expense RVUs (both facility and non-facility), and 1.87 malpractice RVUs. This makes it a high-value surgical code reflecting the complexity of combined orbital fracture repair.

What are common denial reasons for CPT 21387 and how can they be prevented?

Common denials include insufficient documentation of the 'combined' approach (leading to downcoding to 21385/21386), medical necessity questions for delayed repairs, and bundling issues with other orbital codes. Prevent denials by clearly documenting all orbital walls involved, multiple surgical approaches used, specific implant details, and clinical justification for the combined repair approach.