M23.5
Non-billableChronic instability of knee
Chronic instability of knee
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- joints of the spine (M40-M54)
- current injury - see injury of knee and lower leg (S80-S89)
- recurrent dislocation or subluxation of joints (M24.4)
- recurrent dislocation or subluxation of patella (M22.0-M22.1)
Child Codes (3)
Also Known As / Clinical Terms
Frequently Asked Questions
What is the ICD-10 code for chronic instability of knee?
The ICD-10-CM code for chronic instability of knee is M23.5. The full clinical description is "Chronic instability of knee". M23.5 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code M23.5 mean?
ICD-10-CM code M23.5 represents "Chronic instability of knee". It is classified under Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue and is a non-billable header code. Use a more specific child code for billing purposes.
Is M23.5 a billable code?
No, M23.5 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 3 child codes under M23.5.
What chapter is M23.5 in?
M23.5 is in Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (codes M00-M99).
What codes cannot be used with M23.5?
M23.5 has Excludes1 notes indicating codes that cannot be used together with it, including: ankylosis (M24.66); deformity of knee (M21.-); osteochondritis dissecans (M93.2).
What are the subcategories under M23.5?
M23.5 has 3 child codes, including: M23.50 (Chronic instability of knee, unspecified knee), M23.51 (Chronic instability of knee, right knee), M23.52 (Chronic instability of knee, left knee).
What are the UMLS CUIs for M23.5?
M23.5 is linked to 1 UMLS Concept Unique Identifier: C0451820. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.