M77.51 Other enthesopathy of right foot and ankle

Billable ICD-10-CM code, FY2026.

Applies from M77 Other enthesopathies

Excludes1 (never code together)

• bursitis NOS (M71.9-)

Excludes2 (not included here)

• bursitis due to use, overuse and pressure (M70.-)
• osteophyte (M25.7)
• spinal enthesopathy (M46.0-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 726.79 Other enthesopathy of ankle and tarsus (approximate)

Code annotations containing back-references to M77.51

Back-references to M77.5

• Type 2 Excludes: M76 Enthesopathies, lower limb, excluding foot ("enthesopathies of ankle and foot (M77.5-)")

Back-references to M77

• Type 1 Excludes: M65.2 Calcific tendinitis ("tendinitis as classified in M75-M77")
• Type 2 Excludes: M70 Soft tissue disorders related to use, overuse and pressure ("enthesopathies (M76-M77)")
• Type 1 Excludes: M71 Other bursopathies ("enthesopathies (M76-M77)")

Nearby codes

• M77.40 Metatarsalgia, unspecified foot
• M77.41 Metatarsalgia, right foot
• M77.42 Metatarsalgia, left foot
• M77.5 Other enthesopathy of foot and ankle
• M77.50 Other enthesopathy of unspecified foot and ankle
• M77.51 Other enthesopathy of right foot and ankle (this code)
• M77.52 Other enthesopathy of left foot and ankle
• M77.8 Other enthesopathies, not elsewhere classified
• M77.9 Enthesopathy, unspecified