M06.862

Billable

Other specified rheumatoid arthritis, left knee

HCC Category Mapping

V28HCC 93 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.175

V24HCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.307

ESRDHCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.000

RxHCCHCC 83 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.000

What This Code Means

A form of rheumatoid arthritis affecting the left knee joint, characterized by inflammation and joint damage that doesn't fit into other specific rheumatoid arthritis categories.

Coding Tips

•Ensure left knee laterality is clearly documented in the medical record
•Knee involvement in RA often requires imaging confirmation; review radiology reports for supporting documentation

Clinical Significance

Other specified rheumatoid arthritis of the left knee represents an atypical RA variant affecting a major weight-bearing joint essential for mobility and functional independence. Left knee involvement significantly impacts ambulation, transfers, and activities requiring lower extremity stability.

Documentation Requirements

✓Confirmed rheumatoid arthritis diagnosis with specific atypical characteristics
✓Clinical examination documenting left knee joint involvement
✓Description of features that distinguish this as 'other specified' RA type
✓Assessment of left knee function, stability, and weight-bearing tolerance
✓Laboratory findings consistent with active rheumatoid disease
✓Functional evaluation of gait pattern, stair navigation, and mobility aids
✓Documentation of inflammatory signs including effusion or synovitis
✓Treatment plan addressing both inflammation control and functional mobility

Commonly Confused Codes

M06.861 — Other specified rheumatoid arthritis, right knee (incorrect laterality)M06.869 — Other specified rheumatoid arthritis, unspecified knee (when left side documented)M05.862 — Other rheumatoid arthritis with rheumatoid factor of left knee (different RA classification)M25.562 — Pain in left knee (symptom without inflammatory disease)M17.12 — Unilateral primary osteoarthritis, left knee (degenerative joint disease)

Code Hierarchy

└M06Other rheumatoid arthritis └M06.8Other specified rheumatoid arthritis └M06.86Other specified rheumatoid arthritis, knee └M06.862Other specified rheumatoid arthritis, left knee

└M06.862Other specified rheumatoid arthritis, left knee