Summary & Overview
CPT 28312: Toe Phalanx Osteotomy for Alignment and Deformity
CPT code 28312 denotes a surgical osteotomy of a toe phalanx (excluding the proximal phalanx of the great toe) to correct alignment and deformity. This procedure is commonly performed by foot and ankle surgeons and podiatrists to address malalignment that causes pain, impaired function, or progressive deformity. Nationally, codes like 28312 are important for tracking surgical volumes, utilization patterns, and payment across ambulatory surgical centers, hospital outpatient departments, and inpatient facilities.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for the procedure, typical sites of service, and common billing considerations. The publication summarizes national benchmarks where available, highlights policy and coding guidance relevant to surgical toe osteotomies, and outlines how 28312 fits within broader service-line workflows for foot and ankle surgery.
The report is intended for health plan analysts, surgical administrators, medical coders, and policy staff who need a clear, national-level briefing on billing, clinical indications, and operational contexts for CPT code 28312. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 28312 describes an osteotomy of a phalanx in any toe (except the proximal phalanx of the greater toe). The procedure involves cutting and reshaping a portion of the affected toe bone to correct alignment and deformity.
Service type: Surgical — toe phalangeal osteotomy for deformity correction.
Typical site of service: Hospital outpatient surgical center or ambulatory surgery center; may also be performed in an inpatient surgical setting depending on clinical complexity.
Clinical & Coding Specifications
Clinical Context
A typical patient is a 55-year-old ambulatory adult presenting to a podiatry surgical clinic with progressive toe deformity of a lesser toe (second through fifth toes), causing malalignment, pain with ambulation, callus formation, and difficulty fitting footwear. Conservative measures including padding, orthotics, footwear modification, and injections have failed. After diagnostic evaluation — including clinical exam and weight-bearing radiographs — the surgeon recommends an osteotomy of a phalanx to realign the toe and correct deformity. The patient is scheduled for the procedure in an outpatient ambulatory surgery center or hospital outpatient department under regional block or monitored anesthesia care. Preoperative documentation includes indication (e.g., hammertoe, mallet toe, crossover toe), informed consent, review of comorbidities, medication reconciliation, and perioperative anesthesia plan. Intraoperative workflow includes surgical marking, sterile prep, local or regional anesthesia, performance of the phalangeal osteotomy (not involving the proximal phalanx of the great toe), fixation as indicated, hemostasis, dressing, and postoperative instructions. Postoperative care includes pain control, wound checks, activity restrictions, and follow-up radiographs to confirm alignment and healing.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work, time, or complexity substantially exceeds usual for . |