M01
Direct infections of joint in infectious and parasitic diseases classified elsewhere
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 21 never code together
M01code
Excludes1
- arthropathy in Lyme disease (A69.23)A69.23A69.23A69.23
- gonococcal arthritis (A54.42)A54.42A54.42A54.42
- meningococcal arthritis (A39.83)A39.83A39.83A39.83
- mumps arthritis (B26.85)B26.85B26.85B26.85
- postinfective arthropathy (M02.-)M02.-M02.-M02.-
- postmeningococcal arthritis (A39.84)A39.84A39.84A39.84
- reactive arthritis (M02.3)M02.3M02.3M02.3
- rubella arthritis (B06.82)B06.82B06.82B06.82
- sarcoidosis arthritis (D86.86)D86.86D86.86D86.86
- typhoid fever arthritis (A01.04)A01.04A01.04A01.04
- tuberculosis arthritis (A18.01-A18.02)A18.01-A18.02A18.01-A18.02A18.01-A18.02
M00-M99chapter
Excludes2
- arthropathic psoriasis (L40.5-)L40.5-
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- compartment syndrome (traumatic) (T79.A-)T79.A-
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 7
M01code
Code first
- underlying disease, such as:
- leprosy [Hansen's disease] (A30.-)A30.-A30.-A30.-
- mycoses (B35-B49)B35-B49B35-B49B35-B49
- O'nyong-nyong fever (A92.1)A92.1A92.1A92.1
- paratyphoid fever (A01.1-A01.4)A01.1-A01.4A01.1-A01.4A01.1-A01.4
M00-M25block
Includes
- Disorders affecting predominantly peripheral (limb) joints
M00-M99chapter
Notes
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Index entries leading here 1
Subordinate codes 1
Medications 2
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.