M92.31 classifies juvenile osteochondrosis affecting the right upper limb when the specific condition does not fall under a more precisely defined subcategory such as humerus (M92.0x), radius and ulna (M92.1x), or hand (M92.2x).

Documentation tips

What should appear in the chart to support M92.31.

Source · Editorial brief grounded in 7 cited references ↓

• Document laterality explicitly as 'right upper limb' or 'right arm' — not just 'upper extremity' — to justify M92.31 over M92.30.
• Specify the anatomical sub-site (e.g., elbow, distal humerus, proximal radius) in the note; if a named condition with its own code applies, that code supersedes M92.31.
• Record the patient's skeletal maturity status (open vs. closed growth plates on imaging) to support the 'juvenile' classification and defend the code on audit.
• Document imaging findings — X-ray, MRI, or bone scan — noting fragmentation, irregularity, or avascular changes consistent with osteochondrosis.
• Note any prior conservative management (activity restriction, immobilization, physical therapy) if the encounter involves escalation of care, as this supports medical necessity.

Related CPT procedures

Procedure codes commonly billed with M92.31. 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 M92.31 and adjacent codes.

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

• Using M92.31 when a more specific code exists: Panner disease of the right humerus codes to M92.01, and osteochondrosis of the right radius/ulna codes to M92.11 — check the full M92 hierarchy before landing on M92.31.
• Defaulting to M92.30 (unspecified upper limb) without querying the provider; laterality is almost always documentable from the clinical note or imaging report.
• Applying M92.31 to a skeletally mature patient: once physes are closed, juvenile osteochondrosis codes are no longer appropriate — verify age and imaging before assigning.
• Confusing M92.31 with osteochondral lesion or osteochondritis dissecans codes in the M93 category; M92 covers the juvenile osteochondroses (avascular necrosis-type), not OCD lesions.

Clinical context

Source · Editorial summary grounded in 7 cited references ↓

Sibling codes

Other billable codes under M92.3 (laterality / anatomic variants).