M25.669 – Stiffness of unspecified knee, not elsewhere classified

ICD-10-CM 2027 diagnosis code · Other joint disorders

Billable code

ICD-10-CM code M25.669

Code: M25.669 (claims format: M25669)
Description: Stiffness of unspecified knee, not elsewhere classified
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: M25 › M25.6 › M25.66

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

M25 – Other joint disorder, not elsewhere classified

Excludes2 (not included here):

abnormality of gait and mobility (R26.-)
acquired deformities of limb (M20-M21)
calcification of bursa (M71.4-)
calcification of shoulder (joint) (M75.3)
calcification of tendon (M65.2-)
difficulty in walking (R26.2)
temporomandibular joint disorder (M26.6-)

M25.6 – Stiffness of joint, not elsewhere classified

Excludes1 (not coded here):

ankylosis of joint (M24.6-)
contracture of joint (M24.5-)

Block M20-M25

Excludes2 (not included here):

joints of the spine (M40-M54)

Related codes in M25.66

Frequently asked questions

What is ICD-10 code M25.669?

M25.669 is the ICD-10-CM code for stiffness of unspecified knee, not elsewhere classified, in the block M20-M25 (Other joint disorders).

Is M25.669 a billable code?

Yes. M25.669 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does M25.669 belong to?

It belongs to category M25 – Other joint disorder, not elsewhere classified.

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.