Table of Contents
Introduction
A metatarsal fracture claim can look simple, one bone, one closed treatment, one code, until the documentation doesn't clearly say whether manipulation occurred, which metatarsal was involved, or how many fractures were treated in the same cast. CPT 28470 gets billed constantly in podiatry, and it's also one of the more commonly misapplied fracture codes, particularly when more than one metatarsal is broken.
This guide covers what CPT 28470 represents, how it differs from related manipulation and open-treatment codes, and the multiple-fracture billing rule that trips up more claims than almost anything else in this family.
CPT 28470 at a Glance
| Item | CPT 28470 |
|---|---|
| Code | 28470 |
| Treatment Type | Closed treatment of metatarsal fracture |
| Manipulation | Without manipulation |
| Unit Concept | Each, subject to applicable NCCI and payer rules |
| Documentation Focus | Specific metatarsal, closed treatment method, and confirmation no manipulation occurred |
| Major Billing Consideration | Multiple-fracture reporting rules and correct manipulation status |
What Is CPT 28470?
CPT 28470 is defined as closed treatment of a metatarsal fracture, without manipulation, each. "Closed treatment" means the fracture site isn't surgically opened; the provider manages it externally, typically with a cast or splint. "Without manipulation" means the fracture fragments weren't actively reduced or realigned.
The word "each" refers to each metatarsal, but that alone doesn't mean every fractured metatarsal automatically generates a separate billable unit, covered in detail below.
CPT 28470 vs. Related Metatarsal Fracture Codes
| CPT Code | Treatment Concept | Manipulation | Key Distinction |
|---|---|---|---|
| 28470 | Closed treatment | Without manipulation | Use only when documentation confirms no reduction was performed |
| 28475 | Closed treatment | With manipulation | Fracture was actively reduced/realigned, closed technique |
| 28476 | Percutaneous skeletal fixation | With manipulation | Pins or screws placed through the skin; more invasive than 28475 |
| 28485 | Open treatment | Open surgical approach | Fracture site surgically opened; internal fixation when performed |
Code selection should follow the documented service and current CPT/payer guidance, not simply the diagnosis. A metatarsal fracture diagnosis alone doesn't tell the billing team which of these four codes applies; the treatment note has to.
When Is CPT 28470 Appropriate?
CPT 28470 may be supported when the record documents a metatarsal fracture, closed treatment, and no manipulation performed. The note should identify the specific metatarsal, the treatment method, and the plan for immobilization and follow-up.
The medical record, not just the diagnosis, has to support the procedure reported.
Practical Documentation Checklist
Not every item is universally mandatory for every payer; confirm current documentation expectations against the applicable payer policy.
CPT 28470 and Medical Necessity
A valid CPT code alone doesn't guarantee reimbursement. Medical necessity depends on clinical findings, diagnostic evidence supporting the fracture, the treatment decision actually made, and documentation that's internally consistent with the diagnosis and procedure billed. Check payer coverage policies before assuming a correctly coded claim will be paid without question.
CPT 28470 Diagnosis Coding: What Billing Teams Should Check
The procedure code, diagnosis code, and documentation need to tell a consistent story. Confirm laterality, the specific metatarsal, fracture characteristics as documented, the encounter phase (initial, subsequent, or sequela), and that the ICD-10-CM code actually matches what the provider documented.
There's no universal diagnosis list for every CPT 28470 claim; the appropriate code depends on the actual documentation for that patient.
Billing CPT 28470 for Multiple Metatarsal Fractures
Important NCCI Guidance
This is where CPT 28470 claims most often go wrong. Under CMS NCCI guidance, if a single cast, strapping, or splint treats multiple closed metatarsal fractures without manipulation, only one unit of CPT 28470 may be reported, not one unit per fractured metatarsal, even though the descriptor says "each."
The same principle applies to multiple closed fractures treated without a cast or splint, when they occur in an area that would have been treated with a single immobilization device.
This differs from 28485 (open treatment), where each separately fixated metatarsal can potentially support its own unit, since each fracture is a distinct surgical procedure. It also differs from a mixed scenario, one metatarsal manipulated, another not, where both 28475 and 28470 may be reportable together, each tied to its own documented fracture.
- Same closed-treatment method, same immobilization device: generally one unit of 28470, regardless of fracture count
- Mixed treatment: 28475 and 28470 may both apply, tied to the specific fracture each treated
- Open treatment of multiple metatarsals: unit rules differ; verify current NCCI and payer guidance for 28485
- Commercial payers: may apply their own multiple-fracture logic distinct from Medicare's NCCI policy
This is a Medicare/NCCI-based principle. Commercial payers may not apply an identical rule, so verify the applicable payer's current policy before assuming Medicare's approach applies universally.
CPT 28470 Modifiers: What Should Billing Teams Review?
Modifiers should reflect the actual service, not be added automatically. A few come up specifically with CPT 28470:
- LT/RT: Laterality modifiers are generally expected to identify which foot was treated.
- Modifier 25: Relevant for a significant, separately identifiable same-day E/M, supported by documentation distinct from the treatment decision.
- Modifier 57: Relevant only when applicable global surgery rules and payer policy tie it to the decision for a major procedure; verify the specific global period assigned.
CPT coding rules and payer claims-processing rules aren't always identical. Confirm modifier expectations against current payer policy.
Global Surgery and Follow-Up Considerations
Global period assignments and what's bundled into them can differ across payers and even across the closed-treatment code family. Verify the current global period assigned to CPT 28470, whether planned follow-up visits and cast changes fall inside that period, and whether any separately reportable service needs a modifier to be paid separately. Don't assume every follow-up visit is automatically included, or automatically billable, without checking current guidance.
How a CPT 28470 Claim Moves Through the Revenue Cycle
Charge, Allowed Amount, and Patient Responsibility
Reimbursement for CPT 28470 depends on the payer, the specific contract, geographic locality, whether Medicare or commercial rules apply, whether the billing is facility or professional, modifiers, multiple-procedure rules, coverage, medical necessity, and the specific claim circumstances. There's no single figure that applies universally.
Common CPT 28470 Billing Mistakes
| Billing Mistake | Billing Consequence |
|---|---|
| Choosing 28470 without confirming the treatment method | Code may not match what was actually performed |
| Confusing without-manipulation with manipulation treatment | Wrong code from the 28470/28475 family selected |
| Incorrect metatarsal diagnosis | Claim may not align with the documented fracture |
| Missing laterality | Claim may be rejected or flagged for review |
| Weak documentation of the treatment performed | Coding accuracy can't be confirmed |
| Ignoring multiple-fracture billing rules | Overbilled units may be denied or recouped |
| Automatically adding modifiers | Unsupported modifiers can trigger denials |
| Failing to review payer-specific requirements | Claim may miss that payer's rules |
| Diagnosis that doesn't support the procedure | Claim may face a medical necessity question |
| Failing to follow up on denials or underpayments | Recoverable revenue goes unresolved |
Is Your CPT 28470 Claim Ready?
| Question | Yes | No |
|---|---|---|
| 1. Does documentation clearly identify the metatarsal fracture? | ||
| 2. Does the record support closed treatment? | ||
| 3. Is it clear manipulation was not performed? | ||
| 4. Does the diagnosis coding match the documentation? | ||
| 5. Have laterality and fracture details been checked? | ||
| 6. Have applicable Medicare/NCCI or payer rules been reviewed? | ||
| 7. Have modifiers been validated rather than automatically added? |
This is an educational checklist, not a guarantee of claim payment.
Before You Submit a CPT 28470 Claim
Does the CPT code tell the same story as the provider's documentation?
- Treatment type matches the code
- Diagnosis supports the service
- Modifier and payer rules have been reviewed
CPT 28470 Billing Review: What to Check
| Billing Area | What to Verify |
|---|---|
| CPT | Correct treatment method (no manipulation) |
| Diagnosis | Supports the documented fracture |
| Documentation | Service clearly supported |
| Laterality | Matches the clinical record |
| Modifiers | Applied only when justified |
| Payer Rules | Current requirements checked |
| NCCI | Multiple-fracture unit rules reviewed |
| Claim | Clean and internally consistent |
| Payment | Allowed amount and payment reviewed |
| Denial | Root cause identified and corrected |
Podiatry Billing Requires More Than Claim Submission
Successful podiatry RCM requires attention across the entire revenue cycle, from documentation and coding through claim submission, payment posting, denial management, and A/R follow-up. Specialized podiatry billing support can help with coding review, claims submission, denial management, A/R follow-up, payment posting, and revenue cycle reporting.
Sirius Solutions Global works with podiatry practices as a partner focused on building a cleaner, more accountable billing workflow, not a promise of a specific revenue outcome.
Frequently Asked Questions
Disclaimer: Coding, coverage, reimbursement, modifier, and documentation requirements can vary by payer and may change over time. Verify current CPT, CMS/NCCI, MAC, and payer-specific policies before submitting claims. This article is for general educational purposes only and is not legal, coding, compliance, or billing advice for any specific claim, patient, or organization.
Sources Reviewed: Current CPT code descriptions for 28470, 28475, 28476, and 28485, and the CMS National Correct Coding Initiative Medicare Policy Manual guidance on multiple closed fracture treatment. Confirm current policy details with CMS, the applicable MAC, and the payer before billing.