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ICD-10-CM 2027

ICD-10 code for Prepatellar bursitis

M70.4

Prepatellar bursitis

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Bursitis › prepatellar”. Page updated September 29, 2026.

About coding Prepatellar bursitis

The ICD-10-CM code for Prepatellar bursitis is M70.4 (Prepatellar bursitis).

Within M70 (soft tissue disorders related to use, overuse and pressure), M70.4 is specifically for Prepatellar bursitis. Related codes cover Crepitant synovitis (acute) (chronic) of hand and wrist (M70.0), bursitis of hand (M70.1), olecranon bursitis (M70.2), other bursitis of elbow (M70.3), other bursitis of knee (M70.5), trochanteric bursitis (M70.6), other bursitis of hip (M70.7), other soft tissue disorders related to use, overuse and pressure (M70.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: M70.40 (unspecified knee), M70.41 (right knee) and M70.42 (left knee).

Use an additional code for: external cause code to identify activity causing disorder (Y93.-).

Common questions about Prepatellar bursitis ICD-10 codes

What is the ICD-10 code for Prepatellar bursitis?

M70.4 — Prepatellar bursitis (a header code; report a more specific subcode).

Is M70.4 billable?

No. M70.4 is a header code. Report one of its more specific subcodes instead.