ICD-10-CM 2027
ICD-10 code for joint internal derangement
From the official ICD-10-CM alphabetic index entry “Derangement › joint (internal)”. Page updated September 29, 2026.
About coding joint internal derangement
The ICD-10-CM code for joint internal derangement is M24.9 (Joint derangement, unspecified). The official index lists 20 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M24.9.
Within M24, choose M24.9 (Joint derangement, unspecified) only when documentation doesn't support a more specific option: Loose body in joint (M24.0), other articular cartilage disorders (M24.1), disorder of ligament (M24.2), pathological dislocation of joint, not elsewhere classified (M24.3), recurrent dislocation of joint (M24.4), contracture of joint (M24.5), ankylosis of joint (M24.6), Protrusio acetabuli (M24.7) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 564 (Other Musculoskeletal System and Connective Tissue Diagnoses with MCC, relative weight 1.4908), DRG 565 (Other Musculoskeletal System and Connective Tissue Diagnoses with CC, relative weight 0.9783) and DRG 566 (Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC, relative weight 0.7378), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific joint internal derangement codes (official index)
- ankylosis
- articular cartilage M24.10 — Other articular cartilage disorders, unspecified site
- ankle M24.17 — Other articular cartilage disorders, ankle and foot
- elbow M24.12 — Other articular cartilage disorders, elbow
- foot M24.17 — Other articular cartilage disorders, ankle and foot
- hand M24.14 — Other articular cartilage disorders, hand
- hip M24.15 — Other articular cartilage disorders, hip
- knee NEC M23.9 — Unspecified internal derangement of knee
- loose body
- shoulder M24.11 — Other articular cartilage disorders, shoulder
- specified site NEC M24.19 — Other articular cartilage disorders, other specified site
- wrist M24.13 — Other articular cartilage disorders, wrist
- contracture
- current injury
- knee, meniscus or cartilage
- dislocation
- pathological
- recurrent
- knee
- ligament
- loose body
- recurrent
- specified type NEC M24.80 — Other specific joint derangements of unspecified joint, not elsewhere classified
- ankle M24.87 — Other specific joint derangements of ankle and foot, not elsewhere classified
- elbow M24.82 — Other specific joint derangements of elbow, not elsewhere classified
- foot joint M24.87 — Other specific joint derangements of ankle and foot, not elsewhere classified
- hand joint M24.84 — Other specific joint derangements of hand, not elsewhere classified
- hip M24.85 — Other specific joint derangements of hip, not elsewhere classified
- shoulder M24.81 — Other specific joint derangements of shoulder, not elsewhere classified
- specified site NEC M24.89 — Other specific joint derangement of other specified joint, not elsewhere classified
- wrist M24.83 — Other specific joint derangements of wrist, not elsewhere classified
- temporomandibular M26.69 — Other specified disorders of temporomandibular joint
Common questions about joint internal derangement ICD-10 codes
What is the ICD-10 code for joint internal derangement?
- M24.9 — Joint derangement, unspecified. More specific codes apply when the documentation supports them: M24.10, M24.17, M24.12, M24.17 and others below.
What is the ICD-10 code for articular cartilage joint internal derangement?
- M24.10 — Other articular cartilage disorders, unspecified site.
What is the ICD-10 code for temporomandibular joint internal derangement?
- M26.69 — Other specified disorders of temporomandibular joint.
Is M24.9 billable?
- Yes. M24.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M24.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M24.9 as a principal diagnosis.
Is M24.9 a CC or MCC?
- No. M24.9 is neither a CC nor an MCC under MS-DRG v44.0.