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M86.9
ICD-10-CM
Osteomyelitis

Learn about osteomyelitis diagnosis, including clinical documentation, medical coding (ICD-10-CM M86), treatment, and healthcare guidelines. Find information on acute, chronic, and subacute osteomyelitis, along with relevant symptoms, diagnostic criteria, and best practices for healthcare professionals. Explore resources for accurate medical coding and documentation of osteomyelitis for optimal reimbursement and patient care.

Also known as

Bone infection
Pyogenic osteomyelitis
osteitis
+2 more

Diagnosis Snapshot

Key Facts
  • Definition : Bone infection, often bacterial, causing inflammation and destruction.
  • Clinical Signs : Pain, swelling, redness, warmth at infection site, fever, chills, fatigue.
  • Common Settings : Post-surgical infections, open fractures, diabetic foot ulcers, bloodstream infections.

Related ICD-10 Code Ranges

Complete code families applicable to AAPC M86.9 Coding
M86.0-M86.9

Osteomyelitis

Inflammation of bone due to infection.

M00.00-M02.9

Pyogenic arthritis

Joint infection often associated with osteomyelitis.

G00.0-G00.9

Bacterial meningitis

Brain infection that can spread to bone causing osteomyelitis.

A40.0-A41.9

Sepsis

Severe infection that can lead to complications like osteomyelitis.

Code-Specific Guidance

Decision Tree for

Follow this step-by-step guide to choose the correct ICD-10 code.

Is the osteomyelitis acute?

  • Yes

    Site specified?

  • No

    Is it chronic multifocal?

Documentation Best Practices

Documentation Checklist
  • Osteomyelitis diagnosis confirmation method (e.g., bone biopsy, MRI)
  • Specific infected bone site documented
  • Causative organism if identified (e.g., Staphylococcus aureus)
  • Acute or chronic osteomyelitis clearly specified
  • Evidence of inflammation/infection (e.g., elevated WBC, fever)

Coding and Audit Risks

Common Risks
  • Unspecified Site

    Coding osteomyelitis without specifying the bone affected leads to inaccurate coding and reimbursement issues. CDI can clarify the location.

  • Acute vs. Chronic

    Misclassifying acute and chronic osteomyelitis impacts severity coding and DRG assignment. Auditing helps ensure appropriate differentiation.

  • Causative Organism

    Failing to document the causative organism when known hinders appropriate coding and treatment tracking. CDI should query for specificity.

Mitigation Tips

Best Practices
  • Document infection site, duration, and type for accurate ICD-10 coding (M86.-).
  • Ensure CDI captures all pertinent details like bone biopsy, cultures, imaging (e.g., MRI, X-ray) for specificity.
  • Code comorbidities impacting osteomyelitis severity for proper MS-DRG assignment & reimbursement.
  • Query physician for clarity if documentation lacks details about acute/chronic osteomyelitis distinction.
  • Regularly audit osteomyelitis documentation against clinical indicators and coding guidelines for compliance.

Clinical Decision Support

Checklist
  • Verify localized bone pain, tenderness
  • Confirm fever, swelling, or erythema
  • Check labs for elevated WBC, ESR, CRP
  • Review imaging (X-ray, MRI, bone scan) for bone changes
  • Consider blood cultures to identify pathogen

Reimbursement and Quality Metrics

Impact Summary
  • Osteomyelitis reimbursement hinges on accurate ICD-10-CM (e.g., M86.0, M86.16) and appropriate procedure coding (e.g., debridement, I&D) impacting DRG assignment and payment.
  • Coding quality directly affects CMI and hospital case mix index reporting for osteomyelitis cases, influencing overall facility reimbursement.
  • POAs like malnutrition and stage of infection influence osteomyelitis hospital reimbursement impacting MS-DRG assignment and length of stay.
  • Accurate osteomyelitis documentation and coding are critical for quality reporting programs (HACs, PSI) impacting value-based payments and hospital rankings.

Streamline Your Medical Coding

Let S10.AI help you select the most accurate ICD-10 codes. Our AI-powered assistant ensures compliance and reduces coding errors.

Frequently Asked Questions

Common Questions and Answers

Q: What are the most effective evidence-based antibiotic treatment protocols for acute hematogenous osteomyelitis in children, considering pathogen-specific sensitivities and minimizing the risk of antibiotic resistance?

A: Acute hematogenous osteomyelitis in children often requires prolonged antibiotic therapy, guided by pathogen identification and sensitivity testing. Empiric therapy typically begins with broad-spectrum antibiotics like vancomycin or clindamycin, covering Staphylococcus aureus (the most common pathogen). Once culture results are available, antibiotics should be tailored for optimal efficacy. For methicillin-sensitive S. aureus (MSSA), options include nafcillin or cefazolin. For MRSA, vancomycin, clindamycin, or linezolid are often considered. Duration of therapy typically ranges from 4 to 6 weeks, sometimes longer depending on clinical response and disease severity. Explore how multidisciplinary collaboration with infectious disease specialists can optimize antibiotic stewardship and minimize the risk of antibiotic resistance development. Consider implementing local antibiograms to inform empiric therapy choices based on regional pathogen prevalence and resistance patterns.

Q: How can I differentiate between chronic osteomyelitis and other bone lesions, such as bone tumors or stress fractures, using advanced imaging techniques like MRI and nuclear medicine bone scans, and what are the key diagnostic criteria to look for?

A: Differentiating chronic osteomyelitis from other bone lesions requires a combination of clinical findings, laboratory tests, and advanced imaging. MRI offers high sensitivity for detecting bone marrow edema, soft tissue inflammation, and sequestrum formation, key features of osteomyelitis. Nuclear medicine bone scans, particularly three-phase technetium-99m methylene diphosphonate (Tc-99m MDP) scans, can identify areas of increased bone turnover, aiding in differentiating infection from stress fractures. However, both MRI and bone scans can show non-specific findings. Key diagnostic criteria for chronic osteomyelitis on MRI include cortical irregularity, periosteal reaction, cloacae (draining sinuses), and the presence of sequestrum. In contrast, bone tumors may exhibit specific imaging characteristics like a soft tissue mass, matrix mineralization, or cortical destruction patterns distinct from osteomyelitis. Learn more about integrating these imaging modalities with clinical and laboratory data to establish a definitive diagnosis and guide appropriate management.

Quick Tips

Practical Coding Tips
  • Code M86 for acute osteomyelitis
  • Specify site, laterality for M86
  • Document infection source, organism
  • Use Z86.0 for osteomyelitis history
  • Consider G00 for Brodie's abscess

Documentation Templates

Patient presents with complaints consistent with osteomyelitis.  Symptoms include localized bone pain, tenderness, swelling, erythema, and warmth at the affected site (e.g., tibia, femur, spine).  Patient may also exhibit systemic symptoms such as fever, chills, fatigue, and malaise.  Onset of symptoms may be acute or insidious.  Medical history includes recent trauma, surgery, or infection (e.g., cellulitis, bacteremia).  Risk factors for osteomyelitis include diabetes mellitus, peripheral vascular disease, intravenous drug use, and immunosuppression.  Physical examination reveals point tenderness, limited range of motion, and possible purulent drainage.  Laboratory tests, including complete blood count (CBC) with differential, erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), and blood cultures, are ordered to evaluate for signs of infection.  Imaging studies, such as X-ray, MRI, CT scan, or bone scan, may be indicated for diagnosis confirmation and assessment of the extent of bone involvement.  Differential diagnosis includes septic arthritis, soft tissue infection, stress fracture, and bone tumor.  Based on clinical findings and diagnostic results, a diagnosis of acute or chronic osteomyelitis is made.  Treatment plan includes antibiotic therapy (oral or intravenous) based on culture and sensitivity results, pain management, and surgical debridement or drainage if necessary.  Patient education provided regarding medication adherence, wound care, and follow-up appointments.  ICD-10 code assigned (e.g., G00.00, G00.01, G00.08) for acute osteomyelitis, M86.0, M86.1 for chronic osteomyelitis,  and appropriate CPT codes documented for procedures performed. Prognosis depends on factors such as the causative organism, patient's overall health, and timeliness of treatment.
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