M24.669 – Ankylosis, unspecified knee
ICD-10-CM 2027 diagnosis code · Other joint disorders
ICD-10-CM code
M24.669
- Code
M24.669(claims format:M24669)- Description
- Ankylosis, unspecified knee
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
- Block
- M20-M25 Other joint disorders
- Parent codes
- M24 › M24.6 › M24.66
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M24 – Other specific joint derangements
Excludes1 (not coded here):
- current injury - see injury of joint by body region
Excludes2 (not included here):
M24.6 – Ankylosis of joint
Excludes1 (not coded here):
- stiffness of joint without ankylosis (M25.6-)
Excludes2 (not included here):
- spine (M43.2-)
Block M20-M25
Related codes in M24.66
- M24.661 – Ankylosis, right kneeBillable
- M24.662 – Ankylosis, left kneeBillable
Frequently asked questions
What is ICD-10 code M24.669?
M24.669 is the ICD-10-CM code for ankylosis, unspecified knee, in the block M20-M25 (Other joint disorders).
Is M24.669 a billable code?
Yes. M24.669 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does M24.669 belong to?
It belongs to category M24 – Other specific joint derangements.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.