Juvenile osteochondrosis affecting the radius and/or ulna with laterality not documented or not specified in the medical record.

Documentation tips

What should appear in the chart to support M92.10.

Source · Editorial brief grounded in 4 cited references ↓

• Specify the affected arm (right or left) by name in every encounter note — this single step moves the code from M92.10 to the laterality-specific M92.11 or M92.12.
• Document the eponymic diagnosis if applicable: Brailsford disease (radial head) or Burns disease (lower ulna) — both are included under M92.1 and support coding specificity.
• Record imaging findings that confirm the diagnosis, including plain radiograph or MRI evidence of epiphyseal irregularity, fragmentation, or sclerosis at the radial head or distal ulna.
• Note the patient's age and skeletal maturity status — this is a juvenile osteochondrosis category and applies to skeletally immature patients; document age and any growth plate assessment.
• If conservative care has been initiated (immobilization, activity restriction, physical therapy), document it explicitly — this supports medical necessity for ongoing management and related CPT services.

Related CPT procedures

Procedure codes commonly billed with M92.10. 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 M92.10 and adjacent codes.

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

• Defaulting to M92.10 when the clinical note clearly states right or left arm — this triggers unspecified-laterality flags on audit and should be M92.11 or M92.12.
• Using the non-billable parent code M92.1 instead of drilling down to the billable 5th-character code (M92.10, M92.11, or M92.12) — M92.1 will reject on claim submission.
• Confusing juvenile osteochondrosis of the radius/ulna (M92.1x) with osteochondrosis of the humerus (M92.0x) — confirm the specific bone involved on imaging before coding.
• Applying a 7th-character extension — M-codes in this category do not use 7th characters; adding one creates an invalid code.
• Coding M92.10 for an adult patient — osteochondrosis classified here is juvenile by definition; adult forearm osteochondrosis requires a different code category.

Clinical context

Source · Editorial summary grounded in 4 cited references ↓

Sibling codes

Other billable codes under M92.1 (laterality / anatomic variants).