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Official Description

Osteotomy, with or without lengthening, shortening or angular correction, metatarsal; other than first metatarsal, each

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

An osteotomy is a surgical procedure that involves cutting and reshaping bones to correct deformities or misalignments. Specifically, CPT® Code 28308 refers to the osteotomy of a metatarsal bone, excluding the first metatarsal, with the possibility of lengthening, shortening, or angular correction. This procedure is typically indicated for patients with acquired or congenital angular deformities of the foot, such as hallux valgus, metatarsus primus varus, hallux varus, or dorsal bunion. The surgery aims to realign the metatarsal bones to restore proper function and alleviate pain. During the procedure, the surgeon exposes the metatarsal bone, and depending on the specific deformity, the surgical approach may involve excising portions of adjacent bones, such as the proximal phalanx or medial cuneiform. The metatarsophalangeal (MTP) joint capsule may also be incised, and tendons may be divided to facilitate the correction. The osteotomy can be performed as a closing wedge or opening wedge procedure, with internal fixation methods employed to maintain the new alignment. This code is specifically used for osteotomies of metatarsals other than the first, ensuring accurate coding and billing for the surgical intervention performed.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 28308 is indicated for various conditions affecting the metatarsal bones, particularly when angular deformities are present. The following conditions may warrant the performance of this osteotomy:

  • Hallux Valgus A common foot deformity characterized by lateral deviation of the big toe, often leading to pain and difficulty in walking.
  • Metatarsus Primus Varus A condition where the first metatarsal is angled towards the midline of the body, causing misalignment and discomfort.
  • Hallux Varus The opposite of hallux valgus, where the big toe deviates medially, which can also lead to pain and functional issues.
  • Dorsal Bunion A deformity that results in a bony prominence on the top of the foot, often associated with pain and difficulty in footwear fitting.

2. Procedure

The procedure for CPT® Code 28308 involves several critical steps to ensure effective correction of the metatarsal deformity. The following outlines the procedural steps:

  • Step 1: Exposure of the Metatarsal The surgeon begins by making an incision to expose the metatarsal bone that requires correction. This may involve incising the metatarsophalangeal (MTP) joint capsule and dividing tendons as necessary to gain adequate access to the bone.
  • Step 2: Osteotomy Technique Depending on the specific deformity being addressed, the surgeon may perform either a closing wedge or opening wedge osteotomy. In a closing wedge osteotomy, a section of bone is removed from the metatarsal base, neck, or head, and the wedge is closed by manipulating the bone into proper alignment. In contrast, an opening wedge osteotomy involves cutting the bone and using a laminar spreader to open the wedge, allowing for realignment.
  • Step 3: Internal Fixation After achieving the desired alignment, the surgeon may apply internal fixation devices, such as screws or K-wires, to maintain the new position of the metatarsal bones during the healing process.
  • Step 4: Bone Grafting (if applicable) If an opening wedge osteotomy is performed, bone autograft may be placed at the osteotomy site to promote healing and stability. The choice of grafting material depends on the source of the autograft, with specific codes assigned for different harvesting sites.

3. Post-Procedure

Post-procedure care following an osteotomy of the metatarsal involves monitoring for complications and ensuring proper healing. Patients are typically advised to limit weight-bearing activities on the affected foot for a specified period, which may vary based on the extent of the surgery and the individual’s healing process. Follow-up appointments are essential to assess the alignment and healing of the metatarsal bones. Physical therapy may be recommended to restore mobility and strength in the foot. Additionally, patients should be educated on signs of infection or complications that may require immediate medical attention.

Short Descr INCISION OF METATARSAL
Medium Descr OSTEOT W/WO LNGTH SHRT/CORRJ METAR XCP 1ST EA
Long Descr Osteotomy, with or without lengthening, shortening or angular correction, metatarsal; other than first metatarsal, each
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 1 - 150% payment adjustment for bilateral procedures applies.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 2 - Payment restriction for assistants at surgery does not apply to this procedure...
Co-Surgeons (62) 1 - Co-surgeons could be paid, though supporting documentation is required...
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Hospital Part B services paid through a comprehensive APC
ASC Payment Indicator Surgical procedure on ASC list in CY 2007; payment based on OPPS relative payment weight.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P5B - Ambulatory procedures - musculoskeletal
MUE 4
CCS Clinical Classification 161 - Other OR therapeutic procedures on bone
RT Right side (used to identify procedures performed on the right side of the body)
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
LT Left side (used to identify procedures performed on the left side of the body)
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
T6 Right foot, second digit
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
SG Ambulatory surgical center (asc) facility service
T1 Left foot, second digit
GC This service has been performed in part by a resident under the direction of a teaching physician
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
T2 Left foot, third digit
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
81 Minimum assistant surgeon: minimum surgical assistant services are identified by adding modifier 81 to the usual procedure number.
T8 Right foot, fourth digit
82 Assistant surgeon (when qualified resident surgeon not available): the unavailability of a qualified resident surgeon is a prerequisite for use of modifier 82 appended to the usual procedure code number(s).
T7 Right foot, third digit
T9 Right foot, fifth digit
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
50 Bilateral procedure: unless otherwise identified in the listings, bilateral procedures that are performed at the same session, should be identified by adding modifier 50 to the appropriate 5 digit code. note: this modifier should not be appended to designated "add-on" codes (see appendix d).
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
55 Postoperative management only: when 1 physician or other qualified health care professional performed the postoperative management and another performed the surgical procedure, the postoperative component may be identified by adding modifier 55 to the usual procedure number.
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
78 Unplanned return to the operating/procedure room by the same physician or other qualified health care professional following initial procedure for a related procedure during the postoperative period: it may be necessary to indicate that another procedure was performed during the postoperative period of the initial procedure (unplanned procedure following initial procedure). when this procedure is related to the first, and requires the use of an operating/procedure room, it may be reported by adding modifier 78 to the related procedure. (for repeat procedures, see modifier 76.)
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
A2 Dressing for two wounds
AG Primary physician
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
CR Catastrophe/disaster related
F1 Left hand, second digit
F2 Left hand, third digit
F3 Left hand, fourth digit
F4 Left hand, fifth digit
F5 Right hand, thumb
F6 Right hand, second digit
F7 Right hand, third digit
F9 Right hand, fifth digit
GA Waiver of liability statement issued as required by payer policy, individual case
GW Service not related to the hospice patient's terminal condition
PO Excepted service provided at an off-campus, outpatient, provider-based department of a hospital
SF Second opinion ordered by a professional review organization (pro) per section 9401, p.l. 99-272 (100% reimbursement - no medicare deductible or coinsurance)
T3 Left foot, fourth digit
T4 Left foot, fifth digit
T5 Right foot, great toe
TA Left foot, great toe
TL Early intervention/individualized family service plan (ifsp)
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
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Pre-1990 Added Code added.
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