M24.273 – Disorder of ligament, unspecified ankle

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

Billable code

ICD-10-CM code M24.273

Code: M24.273 (claims format: M24273)
Description: Disorder of ligament, unspecified ankle
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 › M24.2 › M24.27

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):

ganglion (M67.4)
snapping knee (M23.8-)
temporomandibular joint disorders (M26.6-)

M24.2 – Disorder of ligament

Applicable to:

Instability secondary to old ligament injury
Ligamentous laxity NOS

Excludes1 (not coded here):

familial ligamentous laxity (M35.7)

Excludes2 (not included here):

internal derangement of knee (M23.5-M23.8X9)

Block M20-M25

Excludes2 (not included here):

joints of the spine (M40-M54)

Related codes in M24.27

M24.271 – Disorder of ligament, right ankleBillable
M24.272 – Disorder of ligament, left ankleBillable
M24.274 – Disorder of ligament, right footBillable
M24.275 – Disorder of ligament, left footBillable
M24.276 – Disorder of ligament, unspecified footBillable

Frequently asked questions

What is ICD-10 code M24.273?

M24.273 is the ICD-10-CM code for disorder of ligament, unspecified ankle, in the block M20-M25 (Other joint disorders).

Is M24.273 a billable code?

Yes. M24.273 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does M24.273 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.