M01

Non-billable

Direct infections of joint in infectious and parasitic diseases classified elsewhere

M01 is the ICD-10-CM code for Direct infections of joint in infectious and parasitic diseases classified elsewhere. It is a non-billable category code — use a more specific child code such as M01.X for billing.

Status
Header (non-billable)
Chapter
M00-M99
Subcodes
1
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

What this means — in plain language

MedlinePlus · NIH

Most kinds of arthritis cause pain and swelling in your joints. Joints are places where two bones meet, such as your elbow or knee. Infectious arthritis is an infection in the joint. The infection comes from a bacterial, viral, or fungal infection that spreads from another part of the body. Symptoms of infectious arthritis include: Intense pain in the joint Joint redness and swelling Chills and fever Inability to…

Read more about Infectious Arthritis at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

  • 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

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

Frequently asked questions

What is ICD-10 code M01?
M01 is the ICD-10-CM code for "Direct infections of joint in infectious and parasitic diseases classified elsewhere". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M01 a billable code?
No — M01 is a non-billable header code. Use a more specific child code (such as M01.X) for billing.
What are the subcodes of M01?
M01 has 1 more specific child code, including M01.X.
What is excluded from M01?
Excludes1 (not coded here): arthropathy in Lyme disease (A69.23); gonococcal arthritis (A54.42); meningococcal arthritis (A39.83); mumps arthritis (B26.85).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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