CPT 21408Surgery

Opn tx orbit fx w/bone grft

CPT 21408 covers surgical repair of a broken eye socket (orbit) using a bone graft. This involves opening the surgical site to realign and stabilize the orbital bones with bone grafting material.

Showing rates for

National Average

Base Medicare rate

$884.68

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

12.78

PE RVU (NF)

12.24

MP RVU

2.33

Total RVU

27.35

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

NCCI bundling edits

Loading bundling edits…

Billing tips

Document the bone graft source explicitly (autograft vs allograft, harvest site if autograft) in the operative report
Impact: Failure to document graft use results in downcoding to 21406 (without graft), losing approximately $100-150 in reimbursement
Separately report bone graft harvesting (CPT 20900-20902) when autograft is obtained from a separate incision site
Impact: Additional $150-400 reimbursement depending on harvest complexity and site; commonly missed revenue opportunity
Use modifier 50 appropriately for bilateral repairs rather than billing 21408 twice with LT/RT modifiers
Impact: Prevents automatic claim denials and ensures correct 150% payment rather than risk of duplicate claim rejection
Verify medical necessity documentation for bone grafting specifically addresses why simple fixation (21406) was insufficient
Impact: Payers frequently audit 21408 claims; robust documentation prevents downcoding and supports the 2.33 higher work RVU differential
Bill facility (ASC/hospital) and professional components separately when applicable; both have identical rates for 21408
Impact: Ensures $884.68 professional fee is captured in addition to facility fee; coordination prevents revenue leakage
Appeal denials for staged bilateral repairs with documentation explaining medical necessity for separate sessions
Impact: Staged procedures often initially denied as duplicates; successful appeals can recover full $884.68 for second side

Live Field Datano reports yet

Real billers contribute denial patterns and appeal strategies for this code. Once 5+ reports come in, you’ll see live aggregated data here — the only place this exists, free.

Working with CPT 21408?

Get the free Revenue Protection Toolkit — the denial triggers, modifier pitfalls, and bundling conflicts that quietly cost you reimbursement. Instant download.

Help build the field knowledge

MedPayIQ gets smarter as billers contribute. If you've had this code denied, share what happened so others learn from it. Anonymous, no patient info.

Related actions

Frequently asked questions

What is the Medicare reimbursement rate for CPT code 21408 in 2025?

The 2025 Medicare national average reimbursement for CPT 21408 is $884.68 for both facility and non-facility settings. This rate is based on 27.35 total RVUs multiplied by the 2025 conversion factor of 32.3465.

What is the difference between CPT 21408 and 21406?

CPT 21408 includes bone grafting as part of the orbital fracture repair, while 21406 is for open treatment without bone grafting. Documentation must explicitly describe bone graft placement to support billing 21408 rather than the lower-valued 21406.

Can I bill bone graft harvesting separately with CPT 21408?

Yes, when autograft bone is harvested from a separate incision site, you can bill CPT 20900-20902 (depending on harvest site) in addition to 21408. The graft harvesting must be documented as a distinct procedural service with separate surgical access.

How many RVUs is CPT code 21408 worth in 2025?

CPT 21408 has 27.35 total RVUs in 2025, consisting of 12.78 work RVUs, 12.24 practice expense RVUs (both facility and non-facility), and 2.33 malpractice RVUs. This reflects the complex nature of orbital fracture repair with bone grafting.

What modifier should I use for bilateral orbital fracture repair with bone grafting?

Use modifier 50 for bilateral procedures performed during the same operative session. Bill 21408 once with modifier 50 rather than billing the code twice with LT and RT modifiers. This typically results in 150% of the base reimbursement rate.

What documentation is required to support CPT 21408 billing?

Required documentation includes detailed fracture description, explicit mention of bone graft type and source, graft placement technique, medical necessity for grafting (bone defect size/location), preoperative CT imaging, and clinical findings such as enophthalmos or diplopia that necessitated repair.

Why do CPT 21408 claims get denied for lack of medical necessity?

Denials occur when documentation fails to justify why open repair with bone grafting was necessary instead of closed reduction or repair without grafting. Appeals should include imaging showing significant displacement or bone loss, and clinical notes documenting functional deficits requiring complex reconstruction.