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v1.0.0
ICD-10 Guide
ICD-10 CodesM86.1

M86.1

Billable

Other acute osteomyelitis

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/17/2025

Code Description

ICD-10 M86.1 is a billable code used to indicate a diagnosis of other acute osteomyelitis.

Key Diagnostic Point:

Acute osteomyelitis is an infection of the bone that can occur due to various pathogens, including bacteria and fungi. It is characterized by the rapid onset of symptoms such as localized pain, swelling, fever, and sometimes systemic signs of infection. The condition can arise from direct contamination following trauma or surgery, hematogenous spread from another infected site, or contiguous spread from adjacent soft tissue infections. In cases classified under M86.1, the osteomyelitis is acute but does not fall into the more common categories of osteomyelitis, such as those caused by Staphylococcus aureus or those associated with diabetes. Diagnosis typically involves imaging studies, such as X-rays or MRI, and laboratory tests to identify the causative organism. Treatment often includes antibiotics and may require surgical intervention to remove necrotic tissue or drain abscesses. The prognosis is generally favorable with prompt treatment, but complications can arise, including chronic osteomyelitis or bone necrosis if not adequately addressed.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of potential causative organisms requiring specific documentation.
  • Differentiation from chronic osteomyelitis and other bone infections.
  • Need for detailed clinical information to support acute diagnosis.
  • Potential for multiple treatment modalities complicating coding.

Audit Risk Factors

  • Inadequate documentation of the causative organism.
  • Failure to specify the acute nature of the osteomyelitis.
  • Misclassification as chronic osteomyelitis.
  • Lack of supporting imaging or lab results.

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed clinical notes on the onset, symptoms, and treatment plan.

Common Clinical Scenarios

Post-surgical infections, trauma-related infections, and infections in patients with comorbidities.

Billing Considerations

Documentation must clearly indicate the acute nature and specific treatment interventions.

Infectious Disease

Documentation Requirements

Comprehensive lab results and culture reports to identify pathogens.

Common Clinical Scenarios

Patients with systemic infections leading to osteomyelitis, particularly in immunocompromised individuals.

Billing Considerations

Focus on the microbiological aspects and the need for targeted antibiotic therapy.

Coding Guidelines

Inclusion Criteria

Use M86.1 When
  • According to ICD
  • 10 guidelines, M86
  • 1 should be used when the osteomyelitis is acute and not specified as due to a specific organism
  • Coders must ensure that the documentation supports the acute diagnosis and that any relevant imaging or lab results are included

Exclusion Criteria

Do NOT use M86.1 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

Arthrocentesis, aspiration, and/or injection into a major joint or bursa

Clinical Scenario

Used when aspiration is performed to relieve pressure from an abscess associated with osteomyelitis.

Documentation Requirements

Document the indication for the procedure and the findings during the aspiration.

Specialty Considerations

Orthopedic specialists should ensure that the procedure is linked to the diagnosis of acute osteomyelitis.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of osteomyelitis, improving the ability to capture the nuances of acute versus chronic conditions. This specificity aids in better tracking of treatment outcomes and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of osteomyelitis, improving the ability to capture the nuances of acute versus chronic conditions. This specificity aids in better tracking of treatment outcomes and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of osteomyelitis, improving the ability to capture the nuances of acute versus chronic conditions. This specificity aids in better tracking of treatment outcomes and resource allocation.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What are the common causes of acute osteomyelitis?

Acute osteomyelitis is commonly caused by bacterial infections, particularly Staphylococcus aureus, but can also be due to other pathogens, including fungi. It can occur following trauma, surgery, or as a complication of systemic infections.