21451

🦷 CPT 21451 — Closed Treatment of Mandibular Fracture; With Manipulation

Quick Reference

wRVU: [verify] | Global Period: 090 (90 days — major procedure) | Assistant Payable: ✅ Typically allowed for operative fracture care when performed in the OR | Bilateral Indicator: 0

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📋 Clinical Description

CPT 21451 describes closed treatment of a mandibular fracture with manipulation — that is, the physician manually realigns the fractured segments and restores occlusion without surgically opening the fracture site.¹² The provider may perform this in the emergency department, OR, or procedure area with appropriate anesthesia or sedation, but there is no open exposure of the fracture site and no formal open reduction; reduction is achieved by external or intraoral manual maneuvering.

Mandibular fractures (ICD‑10‑CM S02.6‑ family) can involve the symphysis, body, angle, ramus, or condyle and are commonly caused by assaults, falls, or motor‑vehicle collisions.³⁻⁴ The primary clinical goals are restoration of functional occlusion, mandibular continuity, and facial form.³ Closed treatment with manipulation is appropriate when the fracture is displaced or maloccluded but can be satisfactorily reduced without open surgery; in many cases, closed reduction is followed by some form of stabilization (for example, temporary intermaxillary fixation), but if durable interdental fixation is placed, 21453 (with interdental fixation) is usually more accurate.¹³

Clinical scenarios where 21451 is appropriate include:

• Displaced mandibular fracture with malocclusion that can be corrected by manual reduction, but where formal arch bar-based interdental fixation is not applied or is minimal/temporary.
• Condylar or subcondylar fractures where closed reduction restores occlusion and jaw function without open surgery, especially in pediatric or medically fragile patients.³
• Multi‑segment mandible fractures where one or more segments can be reduced closed, but the overall plan is non‑open; if any segment undergoes open reduction, an open treatment code applies for that segment instead.
• Initial ED or OR closed reduction performed as definitive management, with the surgeon assuming global fracture care responsibilities for follow‑up.

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🔬 Anatomical & Procedural Considerations

Variant / Situation	Mechanism / Key Steps	Key Notes / Coding Impact
Closed reduction with manual manipulation only	Under local anesthesia or sedation, the surgeon grasps the mandible and applies controlled force to realign fracture segments and restore proper occlusion; no arch bars or long‑term fixation devices are placed.	Classic 21451 scenario: a manual reduction is clearly documented, and stability is acceptable without interdental fixation. Removal is not an issue because no long‑term device is placed.
Closed reduction with short‑term stabilization (e.g., elastics, splints)	After manipulation, the surgeon may use simple intraoral splints, elastics, or short‑term stabilization devices to help maintain alignment without full arch‑bar interdental fixation.	Still consistent with 21451 when stabilization is minor and not equivalent to formal interdental fixation. If full arch bars or comparable devices are used to immobilize the jaws, 21453 becomes the more accurate code.¹³
Condylar fractures treated closed	For condylar or subcondylar fractures, the surgeon manipulates the mandible to restore occlusion and vertical height; often combined with soft diet, physiotherapy, and short‑term immobilization.³⁻⁴	21451 is appropriate when there is documented manual reduction performed; purely observational management without manipulation is 21450 instead. Condylar fractures may be especially suited to closed techniques in children.³

Clinical Pearl

The defining feature of 21451 is manipulation: the surgeon actively reduces the fracture segments and restores occlusion without an open approach. If the record only shows observation and soft diet, use 21450; if interdental fixation (for example, arch bars with intermaxillary fixation) is applied as part of closed treatment, consider 21453.

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✅ Procedure Includes

The following services are generally included in 21451:

• Initial and subsequent evaluation of the fracture once the provider assumes global fracture care responsibility.
• Closed reduction (manipulation) of the mandibular fracture, including any necessary anesthesia or sedation when not separately billable by an anesthesia provider.
• Assessment and documentation of occlusion before and after reduction.
• Use of simple, short‑term stabilization measures (for example, elastics, intraoral splints) that do not meet the threshold for formal interdental fixation.
• Routine post‑fracture follow‑up visits related to the mandibular fracture during the 90‑day global period.

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❌ Excludes / Do Not Report Together

Code	Description	Relationship to 21451
21450	Closed treatment of mandibular fracture; without manipulation	Use only when no manual reduction is performed; if any manipulation is documented, 21451 supersedes 21450 for that fracture episode.
21453	Closed treatment of mandibular fracture; with interdental fixation	Use when closed treatment includes application of interdental fixation (for example, arch bars with intermaxillary fixation); do not report 21451 in addition to 21453 for the same fracture site and encounter.
21452	Percutaneous treatment of mandibular fracture, with external fixation	Represents a more invasive percutaneous technique; not reported with 21451 for the same fracture site in the same session.
21461	Open treatment of mandibular fracture; without interdental fixation	Selected when an open approach is used; open treatment codes supersede closed treatment codes for the same fracture segment.
21462	Open treatment of mandibular fracture; with interdental fixation	More extensive open reduction with fixation and arch bars; do not combine with 21451 for the same fracture site.
E/M codes (9928x / 9921x / 9920x)	Emergency / office visits	Separately reportable only when an E/M service is not included in the global fracture care (for example, initial consult before transfer of care) or when a significant, separately identifiable E/M for a different problem is documented; append modifier ‑25 to the E/M code when appropriate.

Bundling Alert — Global Period is 090, Not 000 or 010

Because 21451 carries a 90‑day global period, routine follow‑up visits for the same mandibular fracture are bundled into the procedure payment. Unrelated E/M services during the global period require modifier ‑24 on the E/M code and clear documentation of a different diagnosis and problem. When subsequent fracture procedures are performed on the same mandible during the global (for example, conversion from closed to open treatment), use modifiers such as ‑58 (staged/related), ‑78 (unplanned return to the OR), or ‑79 (unrelated procedure) as appropriate.

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🩺 Common ICD‑10‑CM Pairings

Initial Encounter Mandibular Fracture Codes

ICD-10 Code	Description	HCC?	Clinical Notes
S02.600A	Fracture of unspecified part of body of mandible, unspecified side, initial encounter for closed fracture	No	Use only when documentation does not specify fracture site or side; query when imaging and exams clearly localize the fracture.
S02.60XA	Fracture of mandible, unspecified site, initial encounter for closed fracture	No	Higher‑level unspecified site code; prefer site‑specific subcodes when available.
S02.65XA	Fracture of angle of mandible, initial encounter for closed fracture	No	Appropriate when imaging shows an angle fracture reduced by closed manipulation.
S02.66XA	Fracture of symphysis of mandible, initial encounter for closed fracture	No	Use for symphysis fractures at the midline managed with closed reduction.
S02.69XA	Fracture of mandible of other specified site, initial encounter for closed fracture	No	For other specified mandibular sites (for example, ramus, condylar base) reduced closed with manipulation.

Subsequent and Sequela Codes

ICD-10 Code	Description	HCC?	Clinical Notes
S02.600D	Fracture of unspecified part of body of mandible, unspecified side, subsequent encounter for fracture with routine healing	No	Used in later follow‑up documentation when healing is progressing normally after closed reduction.
S02.600G	Fracture of unspecified part of body of mandible, unspecified side, subsequent encounter for fracture with delayed healing	No	Appropriate when delayed healing is documented; may support extended restrictions or additional interventions.
S02.69XS	Fracture of mandible of other specified site, sequela	No	Use when long‑term sequelae (for example, malocclusion, chronic pain) are treated after the acute episode and global period have ended.

Coding Specificity Reminder

Mandibular fracture codes require site (symphysis, angle, body, other), encounter type (initial, subsequent with routine healing/delayed healing, nonunion, or sequela), and sometimes side. When imaging reports and operative notes specify a particular site, do not default to unspecified S02.60‑ codes. Query for clarification if the clinical documentation is less specific than the radiology report or trauma history.

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🏥 MS‑DRG and Inpatient Considerations

Inpatient Coding Reminder

On the hospital facility side, ICD‑10‑CM and ICD‑10‑PCS codes — not CPT 21451 — determine MS‑DRG assignment. Isolated mandibular fractures treated with closed reduction in otherwise stable patients may be managed on an outpatient or observation basis with no PCS procedure code beyond imaging. In multi‑trauma inpatients, mandibular fractures coded from the S02.6‑ family group into head and neck trauma DRGs; if an OR procedure is performed (for example, open reduction), it will typically have greater impact on DRG than closed manipulation alone.

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🔧 ICD‑10‑PCS Equivalents (Inpatient Facility Coding)

Note

Closed reduction with manipulation corresponds conceptually to PCS root operation Reposition when coded on the facility side, but many hospitals only assign PCS codes for jaw procedures when the patient undergoes OR‑level treatment or when device placement/traction meets PCS criteria. Purely ED‑based closed reductions without OR time may or may not generate a PCS code, depending on facility policy.

Representative PCS patterns:

• Reposition of mandible, closed approach — used when a documented closed reduction is performed on an inpatient and meets PCS coding standards.
• Reposition of mandible, open approach — used when the patient undergoes conversion to open reduction, aligning instead with CPT open treatment codes (21461-21462).
• No PCS code — when the reduction is done in the ED or at bedside without meeting the threshold for PCS procedural coding, and only diagnostic imaging and supportive care are coded.

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📝 Coding Examples

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Example 1 — Emergency Department: Displaced Angle Fracture with Occlusal Malalignment

Clinical Scenario:
A 30‑year‑old male presents after an assault with jaw pain and malocclusion. CT shows a displaced fracture of the angle of the right mandible with posterior open bite. The on‑call oral and maxillofacial surgeon administers local anesthesia with IV sedation and manually manipulates the mandible until occlusion is restored. No arch bars are placed; the patient is managed with a soft diet and close outpatient follow‑up. The surgeon documents assumption of definitive fracture care and closed reduction of the angle fracture.

Field	Code	Rationale
CPT	21451	Closed treatment of mandibular fracture with manipulation; manual reduction is documented, but no interdental fixation is applied.
PDx	S02.65XA	Fracture of angle of mandible, initial encounter for closed fracture — matches imaging and clinical description.

Note

If the surgeon had applied arch bars and intermaxillary fixation after reduction, 21453 would be the more appropriate CPT code. If the ED provider only suspected fracture and did not perform or arrange definitive reduction, an E/M code without 21451 might be more accurate.

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Example 2 — Inpatient Trauma: Bilateral Condylar Fractures Managed with Closed Reduction

Clinical Scenario:
A 17‑year‑old female is admitted after a motor‑vehicle collision with bilateral condylar fractures and malocclusion. Under general anesthesia in the OR, the maxillofacial surgeon performs closed reduction by manipulating the mandible and guiding the condyles into position, restoring occlusion. Short‑term elastics are used, but no arch bars or long‑term interdental fixation devices are placed. The surgeon plans physiotherapy and soft diet with follow‑up imaging.

Field	Code	Rationale
CPT	21451	Closed treatment of mandibular fracture with manipulation; condylar fractures are reduced closed, and no interdental fixation sufficient to support 21453 is documented.
PDx	S02.69XA	Fracture of mandible of other specified site, initial encounter for closed fracture — reflects condylar site and closed fracture.
SDx	S02.600D	Subsequent encounter with routine healing may be documented at later follow‑up visits as healing progresses.

Warning

If later imaging shows loss of reduction or malocclusion requiring conversion to open reduction, the subsequent open procedure should be coded with the appropriate open treatment code (for example, 21461, 21462) and modifier ‑58 (staged/related) or ‑78 (unplanned return) depending on intent and timing.

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⚠️ Common Coding Pitfalls

• Using 21450 when manipulation is documented: Any description of manual reduction, jaw repositioning, or occlusal realignment supports 21451 rather than 21450 for that fracture episode. Watch for phrases such as “fracture was reduced,” “occlusion was restored,” or “manual manipulation of the mandible” and select 21451 accordingly.

• Reporting 21451 with 21453 for the same fracture/site/session: When closed reduction with manipulation and interdental fixation are performed together on the same mandible fracture, 21453 (with interdental fixation) generally represents the complete service. Do not unbundle 21451 unless payer guidance and documentation support a distinct, separately identifiable reduction event.

• Ignoring the 90‑day global period: Treating 21451 as a minor procedure can lead to separate billing for routine post‑reduction visits within 90 days, resulting in overpayment and audit risk. Track the fracture date and ensure follow‑up visits for the same fracture are treated as global unless unrelated diagnoses or unrelated procedures justify separate reporting.

• Defaulting to unspecified ICD‑10‑CM fracture codes: Radiology and operative reports frequently specify fracture location (angle, symphysis, condyle) and encounter type. Defaulting to S02.60XA or S02.600A when more specific S02.65XA, S02.66XA, or S02.69XA codes are supported by documentation undermines data quality and may affect trauma registry reporting. Query when specificity is available but not clearly documented.

• Misunderstanding when global fracture care begins: Global fracture care and use of 21451 begin when the surgeon assumes ongoing responsibility for fracture management, not at every visit where the fracture is mentioned. A one‑time consult without follow‑up responsibility may be better coded as an E/M encounter rather than 21451.

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📎 Sources

^{1. AMA CPT 2025 Professional Edition — Fracture and/or Dislocation Procedures on the Head (mandibular fracture codes 21450-21453, 21461-21462).}[web:221]
^{2. ENT / AAO‑HNS “Clinical Indicators: Mandibular Fracture” table showing 90‑day global periods and distinguishing closed treatment without manipulation (21450), with manipulation (21451), and with interdental fixation (21453).}[web:81][web:188]
^{3. Iowa Head & Neck Protocols: “Facial Fracture Management Handbook - Mandible Fractures,” detailing goals of mandibular fracture management and indications for closed vs open treatment techniques.}[web:223]
^{4. “Mandibular Fractures: Diagnosis and Management,” peer‑reviewed review article outlining mandibular fracture patterns, closed reduction techniques, and the role of maxillomandibular fixation in treatment.}[web:228]
^{5. Payer and policy documents including Aetna “Medical in Nature Oral Surgery” and CPT‑to‑CDT crosswalks referencing 21450, 21451, and 21453 as simple, closed, and closed‑with‑fixation mandibular fracture treatments.}[web:226][web:227]
^{6. CMS and RBRVS‑based RVU tables (for example, OWCP and MPFS‑linked files) and global surgery guidance establishing 90‑day global period surgery rules and fracture‑care transfer concepts.}[web:12][web:169][web:224]