Diagnosis Code


Code Information

Diagnosis Code: M77.50

Short Description: Other enthesopathy of unspecified foot and ankle

Long Description: Other enthesopathy of unspecified foot and ankle

The code M77.50 is VALID for claim submission

Code Classification:

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Other soft tissue disorders (M70-M79)
      • Other enthesopathies (M77)
        • M77.50 Other enthesopathy of unspecified foot and ankle

Code Version: 2020 ICD-10-CM


  • Bursitis of foot region
  • Disorder of flexor hallucis longus tendon
  • Enthesopathy of ankle AND/OR tarsus
  • Enthesopathy of lower leg and ankle region
  • Intermetatarsal bursitis
  • Tendinitis of flexor hallucis longus
  • Tendinitis of foot
  • Tendinitis of metatarsophalangeal joint of second toe

Diagnostic Related Group(s)

The code M77.50 is grouped in the following Diagnostic Related Group(s) (MS-DRG v37.0)
  • Tendonitis, Myositis And Bursitis With Mcc (557)
  • Tendonitis, Myositis And Bursitis Without Mcc (558)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
M77.50 Right Arrow 726.79 Ankle enthesopathy NEC

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
M77 Other enthesopathies
M77.0 Medial epicondylitis
M77.00 Medial epicondylitis, unspecified elbow
M77.01 Medial epicondylitis, right elbow
M77.02 Medial epicondylitis, left elbow
M77.1 Lateral epicondylitis
M77.10 Lateral epicondylitis, unspecified elbow
M77.11 Lateral epicondylitis, right elbow
M77.12 Lateral epicondylitis, left elbow
M77.2 Periarthritis of wrist
M77.20 Periarthritis, unspecified wrist
M77.21 Periarthritis, right wrist
M77.22 Periarthritis, left wrist
M77.3 Calcaneal spur
M77.30 Calcaneal spur, unspecified foot
M77.31 Calcaneal spur, right foot
M77.32 Calcaneal spur, left foot
M77.4 Metatarsalgia
M77.40 Metatarsalgia, unspecified foot
M77.41 Metatarsalgia, right foot
M77.42 Metatarsalgia, left foot
M77.5 Other enthesopathy of foot and ankle
M77.51 Other enthesopathy of right foot and ankle
M77.52 Other enthesopathy of left foot and ankle
M77.8 Other enthesopathies, not elsewhere classified
M77.9 Enthesopathy, unspecified

This page was last updated on: 10/1/2020