M24.273 Disorder of ligament, unspecified ankle

Billable ICD-10-CM code, FY2026.

Applies from M24 Other specific joint derangements

Excludes1 (never code together)

• 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-)

Applies from M24.2 Disorder of ligament

Applicable to

• Instability secondary to old ligament injury
• Ligamentous laxity NOS

Excludes1 (never code together)

• familial ligamentous laxity (M35.7)

Excludes2 (not included here)

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

MS-DRG index

Defines the logic of DRG(s) 557-558 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 728.4 Laxity of ligament (approximate)

Code annotations containing back-references to M24.273

Back-references to M24.2

• Type 1 Excludes: M25.3 Other instability of joint ("instability of joint secondary to old ligament injury (M24.2-)")
• Type 1 Excludes: M35.7 Hypermobility syndrome ("ligamentous laxity, NOS (M24.2-)")

Nearby codes

• M24.252 Disorder of ligament, left hip
• M24.259 Disorder of ligament, unspecified hip
• M24.27 Disorder of ligament, ankle and foot
• M24.271 Disorder of ligament, right ankle
• M24.272 Disorder of ligament, left ankle
• M24.273 Disorder of ligament, unspecified ankle (this code)
• M24.274 Disorder of ligament, right foot
• M24.275 Disorder of ligament, left foot
• M24.276 Disorder of ligament, unspecified foot
• M24.28 Disorder of ligament, vertebrae
• M24.29 Disorder of ligament, other specified site