M00.129 Pneumococcal arthritis, unspecified elbow

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from M00 Pyogenic arthritis

Excludes2 (not included here)

• infection and inflammatory reaction due to internal joint prosthesis (T84.5-)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 92 — Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis
• CMS-HCC V22: HCC 39 — Bone/Joint/Muscle Infections/Necrosis
• ESRD V24: HCC 39

MS-DRG index

Defines the logic of DRG(s) 548-550 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 041.2 Pneumococcus infection in conditions classified elsewhere and of unspecified site (approximate)
• 711.02 Pyogenic arthritis, upper arm (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Nearby codes

• M00.112 Pneumococcal arthritis, left shoulder
• M00.119 Pneumococcal arthritis, unspecified shoulder
• M00.12 Pneumococcal arthritis, elbow
• M00.121 Pneumococcal arthritis, right elbow
• M00.122 Pneumococcal arthritis, left elbow
• M00.129 Pneumococcal arthritis, unspecified elbow (this code)
• M00.13 Pneumococcal arthritis, wrist
• M00.131 Pneumococcal arthritis, right wrist
• M00.132 Pneumococcal arthritis, left wrist
• M00.139 Pneumococcal arthritis, unspecified wrist
• M00.14 Pneumococcal arthritis, hand