M01

ICD-10Non-billable category

Direct infect of joint in infec/parastc dis classd elswhr

Official ICD-10-CM descriptor (FY2026)

Direct infections of joint in infectious and parasitic diseases classified elsewhere

M01 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

  • arthropathy in Lyme disease (A69.23)
  • gonococcal arthritis (A54.42)
  • meningococcal arthritis (A39.83)
  • mumps arthritis (B26.85)
  • postinfective arthropathy (M02.-)
  • postmeningococcal arthritis (A39.84)
  • reactive arthritis (M02.3)
  • rubella arthritis (B06.82)
  • sarcoidosis arthritis (D86.86)
  • typhoid fever arthritis (A01.04)
  • tuberculosis arthritis (A18.01-A18.02)

Code first

Sequence the underlying condition before this code.

  • underlying disease, such as:
  • leprosy [Hansen's disease] (A30.-)
  • mycoses (B35-B49)
  • O'nyong-nyong fever (A92.1)
  • paratyphoid fever (A01.1-A01.4)

More specific codes under M01

Where this code sits

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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