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M70.4

⚠ Non-billable (Header)

Prepatellar bursitis

Diseases of the musculoskeletal system and connective tissue (M00-M99)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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❌ Excludes1

inherited from M70

Rules from parent category M70: Soft tissue disorders related to use, overuse and pressure

  • • bursitis NOS (M71.9-)

⚠️ Excludes2

inherited from M70

Rules from parent category M70: Soft tissue disorders related to use, overuse and pressure

  • • bursitis of shoulder (M75.5)
  • • enthesopathies (M76-M77)
  • • pressure ulcer (pressure area) (L89.-)

📋 Code Instructions

from M70
  • • external cause code to identify activity causing disorder (Y93.-)

Child Codes (3)

M70.40Prepatellar bursitis, unspecified kneeM70.41Prepatellar bursitis, right kneeM70.42Prepatellar bursitis, left knee

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Code Information

CodeM70.4
BillableNo — Header code
ParentM70
CategoryDiseases of the musculoskeletal system and connective tissue (M00-M99)
Excludes11 rule(s)
Excludes23 note(s)
Child codes3

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)