M02.369
BillableReiter's disease, unspecified 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 an unspecified knee joint, a reactive arthritis that develops following an infection in another part of the body.
Coding Tips
- •Use this code only when the specific knee (right or left) is not documented; query provider if laterality can be determined
- •Document the triggering infection to establish the reactive nature of this arthritis
Clinical Significance
Reiter's disease affecting unspecified knee indicates reactive arthritis when laterality documentation is insufficient or bilateral knee involvement exists. This chronic inflammatory condition significantly impacts weight-bearing function and mobility, requiring comprehensive management with important implications for disability and healthcare costs.
Documentation Requirements
- ✓Documented diagnosis of Reiter's disease involving knee joint(s)
- ✓Clinical rationale for unspecified laterality or bilateral knee involvement
- ✓Evidence of bacterial infection preceding arthritis development
- ✓Assessment of knee joint inflammation and functional limitations
- ✓Synovial fluid analysis results if arthrocentesis performed
- ✓Laboratory evidence of inflammatory arthritis
- ✓Mobility evaluation and weight-bearing capacity assessment
- ✓Treatment plan including immunosuppressive medications
Commonly Confused Codes
M06.069 — Rheumatoid arthritis of unspecified knee has symmetric presentation patternM02.869 — Other reactive arthropathies of unspecified knee is broader diagnostic categoryM17.9 — Osteoarthritis of unspecified knee represents degenerative joint diseaseM25.569 — Knee pain, unspecified represents symptom rather than definitive diagnosis
Code Hierarchy
└M02Postinfective and reactive arthropathies└M02.3Reiter's disease└M02.36Reiter's disease, knee└M02.369Reiter's disease, unspecified knee
└M02.369Reiter's disease, unspecified knee