ICD-10 Code M92.8: Other specified juvenile osteochondrosis

Key takeaways

ICD-10 Code M92.8 covers other specified juvenile osteochondrosis and is billable for FY2026 claims.

Applicable conditions include Kohler disease of the tarsal navicular and Calve’s disease of the vertebral body.

Calcaneal apophysitis, also called Sever’s disease, stopped being an M92.8 inclusion term on October 1, 2024, and now codes to M92.6-.

M92.8 and M92.9 are the only M92 codes billable at four characters, because M92.0 through M92.7 need a fifth.

Practice management software like Pabau captures the diagnosis, site, and laterality at the point of care, which cuts downstream denials.

ICD-10 Code M92.8: Definition and billability status

ICD-10 Code M92.8 is the billable ICD-10-CM code for other specified juvenile osteochondrosis. It covers named childhood osteochondroses at sites that M92.0 through M92.7 do not reach, such as Kohler disease and Calve’s disease. The parent code M92 is not billable, so a claim carrying M92 alone rejects before it reaches adjudication.

M92.8 is valid for HIPAA-covered transactions in the FY2026 ICD-10-CM edition, effective October 1, 2025. That date is the standard annual update cycle for the US system. This article covers the code’s definition, hierarchy, applicable conditions, documentation requirements, and the denial triggers that catch coders out.

Code details at a glance

The table below works as a quick ICD 10 code lookup for ICD-10 Code M92.8. It pulls the reference fields straight from the FY2026 ICD-10-CM tabular list. Use it when you are verifying billability or populating your physical therapy EMR software or orthopedic practice management system.

Code hierarchy: M92 parent code and sibling codes

M92 is the non-billable parent category for other juvenile osteochondrosis, and most of its subcategories are not billable either. M92.0 through M92.7 each need at least a fifth character for laterality or site. That leaves ICD-10 Code M92.8 and M92.9 as the only two ICD 10 codes in this family you can submit at four characters.

M92.8 vs M92.9: M92.8 applies when the clinician names a specific condition with no discrete site code in M92.0 to M92.7. Kohler disease and Calve’s disease are the usual examples. M92.9 is the fallback when the condition is genuinely unspecified, or the note is too thin to code further. Aim for M92.8 whenever the diagnosis is named in the chart.

Applicable conditions: What does M92.8 cover?

M92.8 covers Calve’s disease, Kohler disease of the tarsal navicular, and any other named juvenile osteochondrosis at a site outside M92.0 through M92.7. Those are the “Applicable To” terms in the official ICD-10-CM tabular list. Kohler and Calve’s are the two you will meet most often in pediatric orthopedic and sports medicine charts.

• Calve’s disease (vertebral osteochondrosis in children)
• Osteochondrosis (juvenile) of tarsal navicular (Kohler disease)
• Other named juvenile osteochondroses affecting sites not covered by M92.0 to M92.7

Kohler disease (tarsal navicular osteochondrosis)

Kohler disease is avascular necrosis of the tarsal navicular bone, usually presenting in children aged 3 to 7. It causes foot pain, a limp, and localized tenderness over the medial midfoot. The condition is self-limiting in most cases, with the navicular reconstituting over time. For coding, Kohler disease maps to ICD-10 Code M92.8 under the “Applicable To” note for osteochondrosis (juvenile) of tarsal navicular.

Documentation should confirm the affected foot and include imaging that shows navicular sclerosis or fragmentation. The patient’s age belongs in the same note, because it is what supports the juvenile classification. Practices running sports medicine practice management software should capture the diagnosis and the side before the coder ever sees it.

Calve’s disease

Calve’s disease is osteochondrosis of a vertebral body in children, marked by vertebral flattening known as vertebra plana. It usually affects the thoracic spine and presents with back pain and a limited range of motion. Historically it was confused with eosinophilic granuloma, and modern imaging normally settles the question. Document the affected vertebral level and the juvenile onset to justify M92.8 over an adult osteochondrosis code.

Approximate synonyms and index references

The ICD-10-CM alphabetical index maps condition names to codes, so an ICD 10 lookup by eponym often lands faster than a search by site. When a clinician documents one of the terms below, check whether ICD-10 Code M92.8 is the right assignment. Teams that want a repeatable habit can borrow the approach in our ICD-10 diagnostic code documentation reference.

• Calve’s disease
• Kohler disease
• Osteochondrosis (juvenile) of tarsal navicular [Kohler]
• Other specified juvenile osteochondrosis
• Juvenile osteochondrosis, other specified site

The international WHO ICD-10 classification structures M92.8 differently from the US ICD-10-CM version. Anyone comparing ICD 10 codes across the two systems should confirm which one the payer expects. For US claims, the CDC and NCHS tabular list is the only authority that counts.

Documentation requirements for ICD-10 Code M92.8

A claim carrying ICD-10 Code M92.8 needs documentation that clearly supports the diagnosis. Payers do audit these claims, particularly in pediatric orthopedics, where the split between juvenile and adult osteochondrosis codes changes reimbursement. Strong patient record management at the point of care stops the missing detail that surfaces weeks later at claims review.

The record must address all five of the following to support an M92.8 assignment:

1. Patient age confirming juvenile onset – the M92 family applies to juvenile osteochondrosis only. Date of birth and age at diagnosis should both be explicit in the record.
2. Named condition or specific anatomical site – the clinician documents a named condition such as Kohler or Calve’s disease. Failing that, the site description must be precise enough to rule out M92.0 through M92.7.
3. Laterality where applicable – for a paired site such as the foot in Kohler disease, record whether the left or right side is affected. M92.8 carries no laterality sub-codes, but the note still supports medical necessity and audit defense.
4. Clinical confirmation and imaging – back the diagnosis with X-ray, MRI, or bone scan findings, or with an explicit clinical assessment. A documented differential strengthens the record further.
5. Reasoning that rules out M92.9 – document enough detail to justify the specified code over the unspecified one. Guidance from the Centers for Medicare and Medicaid Services (CMS) tells coders to code to the highest specificity the record supports.

Practices seeing several pediatric musculoskeletal diagnoses a week should build these five elements into the note template. That beats another round of coder training. The elements go missing when a clinician is typing between appointments, not because nobody knows the rule.

Common coding errors to avoid

The M92 family produces a predictable set of errors. Most come from a rushed index lookup, or from the “specified versus unspecified” distinction in ICD-10-CM. The six below are the ones that show up repeatedly in denial reports for this code group.

The second row is the one worth diarizing. The calcaneal apophysitis ICD 10 assignment changed on October 1, 2024, when the FY2025 update dropped the term from M92.8. The change followed advocacy from the American Podiatric Medical Association. Its coding committee had flagged a duplication, because calcaneal apophysitis sat under M92.8 while Sever’s disease sat under M92.6-.

Sever’s apophysitis and calcaneal apophysitis name the same condition, so one home in the tabular list was enough. Claims now belong in M92.6- with the fifth character for laterality. Any internal cheat sheet written before October 2024 still points a podiatry or pediatric sports claim at the wrong subcategory.

The “specified versus unspecified” trap turns up in other code families too. Coders who know the situational anxiety diagnosis code hierarchy will recognize the pattern. A documented condition goes to the most specific option available, never to the catch-all.

DRG grouping and reimbursement context

For inpatient claims, ICD-10 Code M92.8 groups within the MS-DRG system maintained by CMS. The applicable DRG usually falls in the musculoskeletal section, alongside other non-infectious bone and joint disorders. Assignment shifts with the presence of complications or comorbidities, and with whether M92.8 sits in the principal or secondary position.

For outpatient billing, the code supports medical necessity for imaging, physical therapy, orthotics, and sometimes surgery. Check the current CMS ICD-10-CM update files each October for changes to DRG grouping. Good claims management software surfaces those changes for you, so billing teams are not running manual lookups.

Physical therapy practices billing M92.8 as a supporting diagnosis should also read the payer’s local coverage determinations (LCDs). Our guide to physical therapy clinic billing requirements covers how LCDs decide which diagnosis codes justify treatment authorization in a given state.

Related ICD-10 codes in the M91-M94 block

Coders working with M92.8 often need the adjacent codes in the M91-M94 chondropathies block. The table below covers the neighbors that come up most in pediatric musculoskeletal claims. For a worked example of navigating a hierarchical family, see our reference on ICD-10 codes for neurological diagnoses.

Searching the whole M91-M94 block in the AAPC ICD-10-CM code lookup is a fast way to confirm whether a documented condition belongs in M92.8. Many pediatric orthopedic practices keep the ICD List code lookup open for cross-referencing during busy sessions. Wiring those checks into an orthopedic practice management software workflow saves switching systems mid-appointment.

How Pabau keeps M92.8 claims coded and documented correctly

Practice management software like Pabau puts the diagnosis code beside the clinical note rather than in a separate billing screen. The clinician records the site, the imaging finding, and the patient’s age in the same place the code is attached. Nobody has to reconstruct the encounter two weeks later.

That matters for M92.8 because the code stands or falls on the note behind it. A chart naming Kohler disease supports M92.8 comfortably. A chart reading “foot pain, query osteochondrosis” does not, and the claim drops to M92.9 or comes back denied.

Reporting closes the loop. When the same code keeps bouncing, the pattern shows up in your denial reports instead of in the billing manager’s memory. You can then fix the note template that caused it, which is where the M92 family usually goes wrong.

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Conclusion

Miscoding juvenile osteochondrosis is one of the cleaner denial patterns to fix. The hierarchy is short, the applicable conditions are listed explicitly, and the M92.8 versus M92.9 call comes down to a single documentation element. Catch it at the point of care and the rework at claims review disappears.

The trade-off is upkeep. This code family keeps moving, and a cheat sheet written before October 2024 will still route calcaneal apophysitis to M92.8. Check the CDC tabular list each October rather than the laminated copy by the billing desk.

Pabau’s claims management software helps pediatric orthopedic and sports medicine teams attach the right ICD-10-CM code during documentation. It also tracks denial patterns across the M92 family. Book a demo to see how it fits your billing workflow.

Continue your research

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