M36.8
BillableSystemic disorders of connective tissue in other diseases classified elsewhere
HCC Category Mapping
V24HCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease
0.307ESRDHCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease
0.000RxHCCHCC 84 — Vasculitis and Other Autoimmune Disorders
0.000What This Code Means
Systemic connective tissue disease that occurs as a complication of another disease classified elsewhere in the medical coding system.
Coding Tips
- •Code the underlying disease first, then this code as a secondary manifestation
- •Document the specific connective tissue involvement and its relationship to the primary condition
Clinical Significance
Systemic connective tissue disorders occurring as manifestations of other classified diseases represent secondary autoimmune phenomena requiring treatment of both the underlying condition and the connective tissue involvement. This indicates complex multi-system disease requiring coordinated subspecialty care.
Documentation Requirements
- ✓Documentation of primary underlying disease classified elsewhere
- ✓Evidence of secondary systemic connective tissue involvement
- ✓Clear relationship between primary disease and connective tissue manifestations
- ✓Assessment of organs/systems affected by connective tissue involvement
- ✓Treatment response of both primary disease and connective tissue features
- ✓Functional impact of systemic connective tissue involvement
- ✓Specialist management plan for both conditions
Code First
Commonly Confused Codes
M35.9 — Systemic involvement of connective tissue, unspecified (primary condition)M35.89 — Other specified systemic involvement of connective tissue (primary)The underlying disease code alone (misses connective tissue component)M79.9 — Soft tissue disorder, unspecified (not systemic)M25.9 — Joint disorder, unspecified (joint-specific)
Code Hierarchy
└M36Systemic disorders of connective tissue in diseases classified elsewhere└M36.8Systemic disorders of connective tissue in other diseases classified elsewhere
└M36.8Systemic disorders of connective tissue in other diseases classified elsewhere