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

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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