ICDcodes.org
FY2027

M01.X6 — Direct infection of knee in infectious and parasitic diseases classified elsewhere

Not billable

Is M01.X6 billable?

No — M01.X6 is a non-billable header code. M01.X6 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 3 billable codes beneath M01.X6.

M01.X6 at a glance

CodeM01.X6
DescriptionDirect infection of knee in infectious and parasitic diseases classified elsewhere
BillableNo — header code
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Excludes1 — never code together — inherited from M01

The conditions below can never be reported together with M01.X6 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • 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 — inherited from M01

The underlying condition below must be sequenced before M01.X6. M01.X6 describes a manifestation and cannot be the principal or first-listed diagnosis.

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

Excludes2 — not included here — inherited from Chapter 13

The conditions below are not part of M01.X6, but a patient may have both at the same time. When documentation supports it, M01.X6 and the excluded code may both be reported.

  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

What codes fall under M01.X6? (3)

How long has M01.X6 existed?

M01.X6 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

What other codes are in the M01.X family? (9)