Table of Contents
Introduction
A bunion procedure can be performed exactly as planned, with a clean recovery and a satisfied patient, and the claim can still stall -- because the operative note describes a different technique than the one the code on the claim represents. Bunion coding has an unusually large family of related codes, and picking the wrong one is one of the more common, avoidable errors in podiatric surgical billing.
CPT 28292 covers a specific bunion correction technique, and it's easy to confuse with several neighboring codes that look similar on a fee schedule but describe genuinely different surgeries. Getting it right takes more than knowing the code number -- it takes matching the code to exactly what the operative note documents.
This guide covers what CPT 28292 represents, how it compares to related bunion correction codes, what the operative documentation should show, and where these claims typically run into trouble in 2026.
CPT 28292 at a Glance
| Item | Details |
|---|---|
| CPT Code | 28292 |
| Procedure | Correction of hallux valgus (bunionectomy) with resection of the proximal phalanx base, any method |
| Clinical Area | Bunion / hallux valgus surgery, podiatry and foot & ankle surgery |
| Coding Focus | Distinguishing this technique from osteotomy- and fusion-based bunion codes |
| Documentation Focus | Operative note detail supporting the specific technique performed |
| Billing Risk | Code/documentation mismatch with a neighboring bunion code |
What Is CPT 28292?
CPT 28292 describes surgical correction of hallux valgus (bunionectomy), including sesamoidectomy when performed, with resection of the proximal phalanx base, using any method. In older CPT language this was known as a Keller, McBride, or Mayo type procedure, though the current descriptor no longer uses those eponyms -- CPT removed proper-name references from this code family some years ago to reduce confusion, since the same technique was being described differently by different surgeons.
In practical terms, this procedure addresses the bunion deformity by removing bone from the base of the proximal phalanx, rather than cutting and repositioning the metatarsal (an osteotomy) or fusing a joint (an arthrodesis). That distinction is exactly what separates it from the other codes in this family, and it's why the operative note needs to specifically describe what was done to the bone -- not just note that "bunion surgery" was performed.
CPT 28292 vs. Other Bunion & Hallux Valgus Procedure Codes
The current bunion correction code family is built around the specific technique used, not the severity of the deformity alone:
| CPT Code | Procedure Distinction | Documentation Focus |
|---|---|---|
| 28292 | Resection of the proximal phalanx base, any method | Confirm phalanx base resection, not an osteotomy or fusion |
| 28295 | Proximal metatarsal osteotomy, any method | Confirm the osteotomy location: proximal metatarsal |
| 28296 | Distal metatarsal osteotomy, any method | Confirm the osteotomy location: distal metatarsal |
| 28297 | First metatarsocuneiform joint arthrodesis (Lapidus-type) | Confirm fusion of the metatarsocuneiform joint, not just bunion removal |
| 28298 | Proximal phalanx osteotomy, any method | Confirm an osteotomy of the phalanx, distinct from phalanx base resection |
| 28299 | Double osteotomy, any method (combination technique) | Confirm two distinct osteotomy techniques were both performed |
Note: Three older codes in this family -- 28290, 28293, and 28294 -- were eliminated in a prior CPT revision that removed eponym-based descriptions; if an operative note or old template still references one of those numbers, it needs a current-code review before billing.
The Surgical Note Should Drive the Code
Because these codes are distinguished by surgical technique rather than diagnosis severity, the operative note -- not a habit, a template, or the diagnosis alone -- should determine which code is selected. A note that simply says "bunionectomy performed" without describing the specific bone work doesn't clearly support any one of these codes over another.
What Should the Documentation Support?
- Correct procedure is documented
- Operative note supports the procedure performed
- Site is clearly identified
- Laterality is documented when applicable
- Diagnosis is documented
- Medical necessity is supported
- Documentation supports the selected CPT code
- Applicable modifier requirements reviewed
- Units/reporting requirements reviewed
- Payer-specific requirements checked
Note: Use this as a billing review aid, not as a replacement for official coding guidance or payer policy. Not every item is universally mandated by every payer -- general documentation best practices and payer-specific requirements should be treated as separate categories.
Why Medical Necessity Matters in Bunion Surgery Billing
Diagnosis information, clinical documentation, and medical necessity all need to tell a consistent story that supports the specific procedure billed. A correctly selected CPT code doesn't automatically guarantee payment -- payer policy, coverage criteria, and the strength of the supporting record all factor into whether the claim is paid as submitted. Documentation and diagnosis should reinforce each other rather than leaving a reviewer to guess why the procedure was necessary.
CPT 28292 Billing Workflow
Modifiers and CPT 28292
There's no modifier that's universally required for CPT 28292. Where modifiers do come into play, it's typically for reasons common to foot and ankle surgery generally -- such as laterality modifiers (for example, indicating the left or right foot) when a payer requires them, or a distinct procedural service modifier if a genuinely separate procedure was performed during the same operative session. A modifier should only be applied when the operative documentation actually supports the circumstance it represents, and current requirements should always be verified against the applicable payer's policy rather than assumed from a previous claim.
10 CPT 28292 Billing Mistakes to Watch For
| Mistake | Consequence |
|---|---|
| Choosing the CPT before reviewing the operative note | Leads to a code that doesn't match what was actually documented |
| Confusing CPT 28292 with a related bunion procedure code | Osteotomy and fusion techniques are billed under different codes entirely |
| Insufficient operative documentation | A vague note can't support any specific technique-based code |
| Missing laterality where applicable | Can trigger claim edits or payer review |
| Diagnosis information that doesn't support medical necessity | Weakens the claim regardless of correct coding |
| Incorrect modifier use | A modifier applied without supporting documentation creates compliance risk |
| Incorrect units/reporting | Reporting inconsistent with what was actually performed invites review |
| Ignoring payer-specific requirements | Assumes one payer's policy applies universally |
| Assuming Medicare and commercial payers have identical policies | Coverage and documentation expectations can differ significantly |
| Failing to follow up on rejected or denied claims | Claims age into hard-to-recover A/R without a defined process |
5 Checks Before Sending a CPT 28292 Claim
How Much Does CPT 28292 Reimburse?
There's no single reimbursement figure that applies to every CPT 28292 claim. Payment can depend on whether the payer is Medicare or a commercial plan, the geographic locality, the applicable fee schedule, the specific payer contract, coverage, medical necessity, documentation, modifier use, and the individual claim's circumstances. Practices can check the current Medicare Physician Fee Schedule directly through CMS for the applicable locality rather than relying on a generalized figure, and commercial reimbursement should be verified against the specific payer's contracted rate. Sirius Solutions Global does not publish or promise a specific reimbursement amount.
Is Your CPT 28292 Claim Ready?
| Question | Yes | No |
|---|---|---|
| 1. Does the operative documentation clearly support the procedure? | ||
| 2. Does the selected CPT match what was actually performed? | ||
| 3. Does the diagnosis support medical necessity? | ||
| 4. Have modifiers and reporting requirements been reviewed? | ||
| 5. Has the payer's current policy been checked? |
Note: This is an educational self-check and does not guarantee claim acceptance.
From Operative Note to Claim
Why Surgical Podiatry Billing Requires More Than CPT Selection
Effective revenue cycle management for surgical podiatry claims involves more than selecting a procedure code. It involves coding review, operative documentation review, diagnosis validation, medical-necessity review, payer requirement checks, claim submission, rejection and denial management, A/R follow-up, payment posting, reporting, and ongoing revenue-cycle monitoring. Sirius Solutions Global works with podiatry practices across these areas as part of broader billing and RCM support.
Frequently Asked Questions
Disclaimer: This article is provided for general educational and informational purposes and does not replace current CPT instructions, payer policies, Medicare guidance, or professional coding advice. Coding, coverage, and reimbursement requirements may change, so practices should verify current requirements applicable to the specific claim and payer. CPT is a registered trademark of the American Medical Association.
Sources Reviewed: Current CPT code descriptions for 28292-28299 bunion correction codes and CMS/NCCI bundling guidance. Practices should confirm current policy details directly with CMS, the applicable MAC, and the payer before billing.