2026 ICD-10-CM Diagnosis Code M01Direct infections of joint in infectious and parasitic diseases classified elsewhere
M01 is a non-billable ICD-10-CM category code for direct infections of joint in infectious and parasitic diseases classified elsewhere, so it cannot be submitted on claims. Use a more specific code from this category instead, such as M01.X0, M01.X11, M01.X12, and M01.X19.
Code Identity
Code Classification
Specific Coding for Direct infect of joint in infec/parastc dis classd elswhrOverview
Non-specific codes like M01 require more characters. Use one of these billable codes instead:
M01.X for Direct infection of joint in infectious and parasitic diseases classified elsewhere
Use M01.X0 for Direct infection of unspecified joint in infectious and parasitic diseases classified elsewhere
M01.X1 for Direct infection of shoulder joint in infectious and parasitic diseases classified elsewhere
M01.X2 for Direct infection of elbow in infectious and parasitic diseases classified elsewhere
M01.X3 for Direct infection of wrist in infectious and parasitic diseases classified elsewhere
M01.X4 for Direct infection of hand in infectious and parasitic diseases classified elsewhere
M01.X5 for Direct infection of hip in infectious and parasitic diseases classified elsewhere
M01.X6 for Direct infection of knee in infectious and parasitic diseases classified elsewhere
M01.X7 for Direct infection of ankle and foot in infectious and parasitic diseases classified elsewhere
Use M01.X8 for Direct infection of vertebrae in infectious and parasitic diseases classified elsewhere
Use M01.X9 for Direct infection of multiple joints in infectious and parasitic diseases classified elsewhere
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
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
Type 1 Excludes
- 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
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Patient EducationClinical
Infectious Arthritis
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:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code HistoryHistory
Questions About M01Overview
Is M01 a billable code?
No. This is a category header that groups the codes for direct infections of joint in infectious and parasitic diseases classified elsewhere, and headers cannot be submitted on claims. Claims for direct infections of joint in infectious and parasitic diseases classified elsewhere need a more specific code from this category, such as M01.X0, M01.X11, and M01.X12.
