Septic Arthritis of the Right Knee
Find information on septic arthritis of the right knee including clinical documentation, diagnosis codes (ICD-10 M00.061), medical coding guidelines, healthcare provider resources, and treatment options. Learn about the symptoms, causes, and management of right knee septic arthritis for accurate medical record keeping and appropriate billing. This resource provides relevant information for physicians, coders, and other healthcare professionals dealing with right knee joint infections.
Joint inflammation caused by infection.
Swollen, red, hot, painful knee with limited range of motion and fever.
Hematogenous spread, direct inoculation, or from adjacent infection.
ICD-10 Code Families
Complete code families applicable to M00.961
When to use each related code
| Description | When to use |
|---|---|
| Right Knee Septic Arthritis | Infection in right knee joint. Confirmed bacterial/fungal cause. Use when pus/positive culture present. |
| Right Knee Arthritis (NOS) | Right knee joint inflammation, cause unspecified. Use when infection ruled out and no other specific type applies. |
| Right Knee Reactive Arthritis | Right knee inflammation after infection elsewhere. No infection in knee itself. Culture negative. |
Best-practice checklist
- ✓Right knee septic arthritis: Synovial fluid analysis results
- ✓Right knee septic arthritis: Blood culture results
- ✓Right knee septic arthritis: Imaging study findings (X-ray, MRI, etc.)
- ✓Right knee septic arthritis: Signs/symptoms (pain, swelling, fever)
- ✓Right knee septic arthritis: Antibiotics administered and response
Best-practice tips
- 01Document aspiration results, WBCs, cultures for ICD-10 A49.01 accuracy.
- 02Timely antibiotics crucial: Note onset, duration for optimal coding, compliance.
- 03Image knee pre-antibiotics: MRI preferred, X-ray acceptable for diagnosis clarity.
- 04Specify organism if known (e.g., Staph) for targeted treatment, precise coding.
- 05Surgical intervention? Document procedure, findings for A49.01, CDI compliance.
Step-by-step checklist
- 1
1. Right knee joint pain, swelling, limited ROM? (ICD-10 J03.0)
- 2
2. Fever, chills, elevated WBCs, ESR, CRP? (Sepsis codes)
- 3
3. Synovial fluid analysis: WBC >50,000/mm3? (CPT 88700)
- 4
4. Blood cultures obtained before antibiotics? (Patient safety)
- 5
5. Consider imaging (X-ray, MRI) if diagnosis unclear. (CPT 73000, 73721)
Ready-to-paste narrative
Patient presents with right knee pain, swelling, erythema, and warmth, consistent with suspected septic arthritis. Onset of symptoms was reported as acute, beginning approximately three days prior to presentation. Patient reports significant pain with any movement of the right knee and difficulty bearing weight. Range of motion is severely limited due to pain and swelling. Fever of 101.5 degrees Fahrenheit was documented. Patient denies any recent trauma to the knee. Medical history includes type 2 diabetes mellitus and hypertension. Physical examination reveals marked tenderness to palpation of the right knee joint, with notable effusion. Labs ordered include complete blood count with differential, erythrocyte sedimentation rate, C-reactive protein, and joint aspiration for synovial fluid analysis and culture. Differential diagnosis includes gout, pseudogout, and reactive arthritis. Given the clinical presentation and elevated inflammatory markers, septic arthritis of the right knee is the leading diagnosis. Initial treatment includes intravenous antibiotics and pain management. Orthopedic consultation is requested for possible joint drainage and further management. Patient education provided regarding the importance of antibiotic adherence and follow-up care. ICD-10 code M00.061 and CPT codes for joint aspiration and injection will be applied based on procedures performed. Continued monitoring for response to treatment and potential complications is warranted.
Clinical accuracy: This information is provided for documentation and coding guidance and should not replace professional medical judgment.
Coding standard: ICD-10-CM, current FY guidelines.