Pathological dislocation of a joint not covered by more specific M24.3 subcategories — used when the affected joint falls outside the spine, shoulder, elbow, wrist, finger, hip, knee, ankle, foot, or toe groupings already enumerated in M24.3.

Documentation tips

What should appear in the chart to support M24.39.

Source · Editorial brief grounded in 4 cited references ↓

• Name the specific joint affected — 'sternoclavicular,' 'sacroiliac,' 'pubic symphysis,' etc. — not just 'joint dislocation'; M24.39 requires an identifiable joint that simply lacks its own subcategory.
• Distinguish pathological (disease-driven) from traumatic dislocation explicitly in the note; a trauma mechanism routes to an S-code, not M24.39.
• Document the underlying causative condition (e.g., rheumatoid arthritis, Charcot joint, septic arthritis, tumor) so that dual coding and sequencing rules can be applied correctly.
• Include relevant imaging findings — X-ray, CT, or MRI — that confirm joint displacement without an acute fracture or ligamentous injury consistent with trauma.
• If prior conservative treatment has failed (bracing, physical therapy, injections), record that history to support medical necessity for any planned procedural intervention.

Related CPT procedures

Procedure codes commonly billed with M24.39. Linking the right diagnosis to the right procedure is what establishes medical necessity.

Source · CMS LCDs · AAOS specialty guidance · claims-pattern analysis

Common coding pitfalls

The recurring mistakes coders make with M24.39 and adjacent codes.

Source · Editorial brief grounded in CDC ICD-10-CM tabular guidance, AAOS coding references, and cited references ↓

• Assigning M24.39 to a shoulder, hip, knee, ankle, or foot pathological dislocation — each of those joints has its own M24.31–M24.37 subcategory; M24.39 is strictly for joints not enumerated there.
• Confusing pathological dislocation with recurrent dislocation: if the joint has a history of multiple dislocations (not driven by active disease), M24.4x recurrent dislocation codes apply instead.
• Using M24.39 for a current traumatic dislocation — acute injury dislocations belong in the S-code range with the appropriate 7th-character encounter suffix (A, D, or S).
• Omitting the underlying disease code when one is documented; pathological dislocation is almost always a manifestation of another condition and dual coding is typically expected.
• Applying this code to temporomandibular joint pathology — TMJ disorders are excluded from M24 and belong in M26.6x.

Clinical context

Source · Editorial summary grounded in 4 cited references ↓

Sibling codes

Other billable codes under M24.3 (laterality / anatomic variants).