M02.362
BillableReiter's disease, left knee
HCC Category Mapping
V28HCC 94 — Reactive and Specified Arthropathies
0.000V24HCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease
0.307ESRDHCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease
0.000RxHCCHCC 83 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease
0.000What This Code Means
Reiter's disease affecting the left knee joint, a reactive arthritis that develops following an infection in another part of the body.
Coding Tips
- •Confirm laterality is documented as left; if unspecified, use M02.369 instead
- •Document the triggering infection (commonly chlamydia or dysentery) to support medical necessity and treatment decisions
Clinical Significance
Reiter's disease of the left knee is a chronic inflammatory arthropathy affecting a major weight-bearing joint that significantly impairs mobility and functional capacity. This reactive arthritis condition requires ongoing rheumatologic management and has substantial implications for patient independence and healthcare resource utilization.
Documentation Requirements
- ✓Clear documentation of left knee joint involvement
- ✓Established diagnosis of Reiter's disease with clinical evidence
- ✓History of antecedent infection triggering reactive arthritis
- ✓Physical findings of knee joint swelling, effusion, and stiffness
- ✓Joint aspiration results if performed showing inflammatory fluid
- ✓Functional assessment of gait and weight-bearing tolerance
- ✓Laboratory studies demonstrating inflammatory markers
- ✓Response to anti-inflammatory and disease-modifying treatments
Commonly Confused Codes
M06.062 — Rheumatoid arthritis of left knee has different joint distribution and serologyM02.862 — Other reactive arthropathies of left knee is less specific categoryM17.12 — Unilateral primary osteoarthritis of left knee represents wear-and-tear changesM70.40 — Prepatellar bursitis, unspecified knee affects bursa rather than joint
Code Hierarchy
└M02Postinfective and reactive arthropathies└M02.3Reiter's disease└M02.36Reiter's disease, knee└M02.362Reiter's disease, left knee
└M02.362Reiter's disease, left knee