M76.51 Patellar tendinitis, right knee

Billable ICD-10-CM code, FY2026.

Applies from M76 Enthesopathies, lower limb, excluding foot

Excludes2 (not included here)

• bursitis due to use, overuse and pressure (M70.-)
• enthesopathies of ankle and foot (M77.5-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 726.64 Patellar tendinitis (approximate)

Code annotations containing back-references to M76.51

Back-references to M76

• 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

• M76.40 Tibial collateral bursitis [Pellegrini-Stieda], unspecified leg
• M76.41 Tibial collateral bursitis [Pellegrini-Stieda], right leg
• M76.42 Tibial collateral bursitis [Pellegrini-Stieda], left leg
• M76.5 Patellar tendinitis
• M76.50 Patellar tendinitis, unspecified knee
• M76.51 Patellar tendinitis, right knee (this code)
• M76.52 Patellar tendinitis, left knee
• M76.6 Achilles tendinitis
• M76.60 Achilles tendinitis, unspecified leg
• M76.61 Achilles tendinitis, right leg
• M76.62 Achilles tendinitis, left leg