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15
Diseases of the musculoskeletal system or connective tissue
Arthropathies
Certain specified joint disorders or deformities of limbs
FA33
Internal derangement of knee
FA33.4
category
Chronic instability of knee
Exclusions
Recurrent instability of patella
(FA32.0)
3 subordinate codes
FA33.40
Chronic instability of knee, medial collateral ligament or other or unspecified part of medial meniscus
4B4Y
Other specified diseases of the immune system
4B4Z
Diseases of the immune system, unspecified
Nearby in Internal derangement of knee
FA33.0
Cystic meniscus
FA33.1
Discoid meniscus
FA33.2
Derangement of meniscus due to old tear or injury
FA33.3
Loose body in knee
4B4Y
Other specified diseases of the immune system
4B4Z
Diseases of the immune system, unspecified
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FA33.3 — Loose body in knee
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4B4Y — Other specified diseases of the immune system