AutoICD API

M23.9

Non-billable

Unspecified internal derangement of knee

Unspecified internal derangement of knee

This is a header/category code. For billing purposes, use a more specific child code from the list below.

Status

Non-billable / Header

Block

M20-M25

Parent Code

M23

Child Codes

3

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)

M23.90

Unspecified internal derangement of unspecified knee

BillableM23.91

Unspecified internal derangement of right knee

BillableM23.92

Unspecified internal derangement of left knee

Billable

Also Known As / Clinical Terms

UMLS

Frequently Asked Questions

What is ICD-10 code M23.9?

ICD-10-CM code M23.9 represents "Unspecified internal derangement of knee". It is a non-billable header code — use a more specific child code for billing purposes.

Is M23.9 a billable code?

No, M23.9 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 M23.9.

What chapter is M23.9 in?

M23.9 is in Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (codes M00-M99).

What codes cannot be used with M23.9?

M23.9 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 M23.9?

M23.9 has 3 child codes, including: M23.90 (Unspecified internal derangement of unspecified knee), M23.91 (Unspecified internal derangement of right knee), M23.92 (Unspecified internal derangement of left knee).

What are the UMLS CUIs for M23.9?

M23.9 is linked to 1 UMLS Concept Unique Identifier: C0158053. 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.