Glossary · Clinical

Dislocation

A dislocation is a joint injury in which the articulating bone ends are forcibly displaced out of their normal anatomic position. Treatment is classified as closed, percutaneous, or open, and each classification carries a distinct CPT code family with a 90-day global period.

Verified May 8, 2026 · 7 sources ↓

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Definition

Source · Editorial summary grounded in 7 cited references ↓

A dislocation occurs when trauma—typically a fall, direct blow, or high-energy force during contact sports—drives the ends of two bones out of their normal joint alignment. Any synovial joint can dislocate; the shoulder, hip, elbow, finger, knee, and ankle are the most commonly affected sites in orthopedic practice. The severity ranges from a subluxation (partial displacement) to a complete dislocation, and the joint capsule, surrounding ligaments, and neurovascular structures may be injured simultaneously.

From a coding and reimbursement standpoint, dislocation treatment is categorized by how the joint is accessed: closed treatment (no surgical exposure), percutaneous treatment (instrument insertion without direct visualization), or open treatment (surgical exposure of the joint). Each category is further split by whether manipulation—active repositioning—was performed. Because CPT bundles the initial cast, splint, or strapping into the dislocation treatment code, those stabilization services cannot be billed separately when a definitive treatment code is reported.

ICD-10-CM captures dislocations by anatomic site and encounter type (initial, subsequent, or sequela). Critically, ICD-10-CM no longer combines the dislocation and any associated open wound into a single code; the open wound must be coded separately. Documentation must identify the specific joint, laterality, and whether the injury is traumatic or pathologic to support accurate code selection across both the CPT and ICD-10-CM systems.

Why it matters

Choosing the wrong treatment category—for example, reporting an open treatment code when only closed manipulation was performed, or billing a strapping code alongside a definitive dislocation treatment code—triggers NCCI edit denials and exposes the practice to overpayment audits. Equally, failing to append modifier -54 when an emergency physician or covering provider performs the reduction but will not manage the 90-day global follow-up period causes the billing provider to accept global responsibility they never intended to assume, blocking the treating surgeon from collecting post-reduction care visits. Getting the treatment category and modifier right the first time prevents write-offs, downstream denial appeals, and potential fraud-and-abuse scrutiny.

Common mistakes

Where people most often go wrong with this concept.

Source · Editorial brief grounded in cited references ↓

Billing a cast or strapping CPT code (e.g., 29515, 29581) separately when a definitive dislocation treatment code already bundles that service per NCCI Chapter 4 rules.
Reporting both a closed treatment code and an open treatment code for the same dislocation at the same anatomic site—NCCI considers these mutually exclusive; only one repair code per site is payable.
Omitting modifier -54 when the treating provider (commonly an ED physician) performs the initial reduction but will not furnish the 90-day global follow-up, leaving the wrong provider responsible for the global period.
Coding the dislocation and an associated open wound as a single combination code in ICD-10-CM; the open wound must be reported as a separate, additional code.
Using modifier -59 or X{EPSU} modifiers to unbundle procedures performed on the same joint in the same operative session without a valid distinct-service justification, which is a common audit trigger.
Appending modifier -78 to a dislocation reduction that occurs outside the postoperative period of a prior procedure—modifier -78 is appropriate only for unplanned returns to the OR for a related procedure within an active global period (e.g., prosthetic hip dislocation requiring closed reduction after total hip arthroplasty).

Related codes

Codes commonly involved when this concept appears in practice.

CPT

Modifiers

59 Distinct procedural service 78 Unplanned return to OR LT Left side RT Right side

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 7 cited references ↓

01Can a strapping or splinting code be billed alongside a dislocation treatment code?

No. Per NCCI Chapter 4, casting, splinting, and strapping are bundled into all closed, percutaneous, and open dislocation treatment CPT codes and cannot be reported separately. The only exception is when a provider applies a splint as the sole initial service with no other definitive procedure and does not intend to provide any further treatment—in that scenario, an E&M code plus a casting/splinting code and a supply code may be appropriate instead of a dislocation treatment code.

02When should modifier -54 be used for dislocation care?

Modifier -54 should be appended to the dislocation treatment code whenever the provider who performs the initial reduction or definitive treatment will not be furnishing the 90-day global follow-up care. This is common in emergency department settings. Without -54, the billing provider accepts the full global period, blocking the surgeon who manages follow-up from billing those visits.

03Can both a closed treatment code and an open treatment code be reported for the same dislocation?

No. NCCI policy states that closed, percutaneous, and open repair codes for the same anatomic site are mutually exclusive. Only one dislocation repair code may be reported per anatomic site per operative session. Reporting more than one risks denial and potential audit scrutiny.

04How does ICD-10-CM handle an open dislocation with an associated wound?

ICD-10-CM no longer combines the dislocation and open wound into a single code. An instructional note at the start of each dislocation category (e.g., S03, S43, S73, S83, S93) directs coders to assign a separate code for any associated open wound. Both codes must appear on the claim to accurately reflect the injury.

05Is modifier -78 appropriate for a prosthetic hip dislocation treated with closed reduction after a total hip arthroplasty?

Yes, provided the reduction is performed in the operating room during the global period of the original arthroplasty. Modifier -78 signals an unplanned return to the OR for a related procedure within an active postoperative period. The appropriate CPT (e.g., 27253) should be reported with -78 and the applicable laterality modifier. Bedside reductions outside the OR do not qualify for -78.

06What is the difference between a dislocation and a subluxation for coding purposes?

A complete dislocation involves full displacement of articulating surfaces, while a subluxation is a partial displacement. ICD-10-CM distinguishes the two with separate codes at most anatomic sites (e.g., S43.01x for anterior subluxation of the shoulder versus S43.02x for anterior dislocation). CPT treatment codes may also differ, so the physician's documentation must clearly state the degree of displacement.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

When Mira detects documentation of a joint dislocation, it performs the following actions: 1. TREATMENT CATEGORY FLAG — Mira reads operative and encounter notes to classify the intervention as closed (no surgical exposure), percutaneous (instrument-assisted, no direct visualization), or open (surgical exposure), then maps to the corresponding CPT family and flags if the documented approach conflicts with the selected code. 2. MANIPULATION CHECK — Mira distinguishes notes describing active repositioning ('reduction performed,' 'joint relocated under fluoroscopy') from passive stabilization only, and routes to the correct with-manipulation or without-manipulation code variant. 3. BUNDLING ALERT — If a cast, splint, or strapping code is simultaneously present on the claim with a definitive dislocation treatment code, Mira flags the strapping code as a likely NCCI bundle violation and suppresses it from the draft claim. 4. MODIFIER -54 PROMPT — When the treating provider is identified as an emergency physician or a covering provider who documents no intent to manage follow-up, Mira pre-populates modifier -54 on the dislocation treatment code and queues a -55 shell for the accepting surgeon. 5. MODIFIER -78 SCREENING — If the dislocation event falls within the global period of a prior procedure (e.g., post-THA prosthetic hip dislocation requiring OR-based closed reduction), Mira suggests modifier -78 and confirms the procedure is being returned to the OR rather than managed at bedside. 6. ICD-10-CM OPEN WOUND SPLIT — If the encounter note describes an open dislocation or a concomitant laceration, Mira adds a separate open-wound ICD-10-CM code per the category-level instructional note and alerts the coder to verify laterality and encounter type (7th character).

See Mira's approach

Related terms

Subluxation Clinical

A subluxation is an incomplete or partial dislocation of a joint in which the articular surfaces lose their normal relationship but retain some contact. In the spinal context used by CMS, it specifically refers to a vertebra that is out of position relative to adjacent vertebrae, producing measurable clinical or radiographic findings.

Bundling Coding

Bundling is the payer rule that treats two or more CPT codes as a single reimbursable unit, paying only the primary code when the secondary procedure is considered an inherent or integral part of it. Billing the bundled codes separately without proper justification constitutes unbundling, a compliance violation.

ICD-10-CM Coding

ICD-10-CM (International Classification of Diseases, Tenth Revision, Clinical Modification) is the U.S. diagnosis coding system used on every claim to communicate why a service was performed, establish medical necessity, and support reimbursement. Maintained by CMS and CDC, it has been required for all HIPAA-covered entities since October 1, 2015.

Relative Value Unit (RVU) Reimbursement

A Relative Value Unit (RVU) is a numeric weight assigned to each CPT code that quantifies the resources required to perform a medical service; when multiplied by a conversion factor and geographic adjustments, it determines Medicare and commercial payer reimbursement.