M02.379
BillableReiter's disease, unspecified ankle and foot
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 ankle and foot, a reactive arthritis that develops following an infection in another part of the body.
Coding Tips
- •Use this code only when the specific ankle/foot (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 ankle and foot indicates reactive arthritis when laterality cannot be determined or bilateral involvement exists. This chronic inflammatory condition significantly impacts ambulation and weight-bearing function, requiring comprehensive management with important implications for mobility and functional status.
Documentation Requirements
- ✓Documented diagnosis of Reiter's disease involving ankle and foot joint(s)
- ✓Clinical justification for unspecified laterality or bilateral involvement
- ✓Evidence of bacterial infection preceding arthritis onset
- ✓Assessment of ankle and foot joint inflammation and functional impairment
- ✓Gait evaluation and ambulation capacity assessment
- ✓Laboratory studies confirming inflammatory arthritis
- ✓Imaging studies demonstrating joint involvement
- ✓Treatment plan with disease-modifying medications
Commonly Confused Codes
M06.079 — Rheumatoid arthritis of unspecified ankle and foot has different serologyM02.879 — Other reactive arthropathies of unspecified ankle and foot is broader categoryM19.079 — Osteoarthritis of unspecified ankle and foot represents degenerative diseaseM25.579 — Ankle and foot pain, unspecified is symptomatic rather than diagnostic
Code Hierarchy
└M02Postinfective and reactive arthropathies└M02.3Reiter's disease└M02.37Reiter's disease, ankle and foot└M02.379Reiter's disease, unspecified ankle and foot
└M02.379Reiter's disease, unspecified ankle and foot