M05 — Rheumatoid arthritis with rheumatoid factor
Not billable
Is M05 billable?
No — M05 is a non-billable header code. M05 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 60 billable codes beneath M05.
Billable codes under this header
- M05.9Rheumatoid arthritis with rheumatoid factor, unspecified
- M05.AAbnormal rheumatoid factor and anti-citrullinated protein antibody with rheumatoid arthritis
- M05.00Felty's syndrome, unspecified site
- M05.09Felty's syndrome, multiple sites
- M05.10Rheumatoid lung disease with rheumatoid arthritis of unspecified site
- M05.19Rheumatoid lung disease with rheumatoid arthritis of multiple sites
- M05.20Rheumatoid vasculitis with rheumatoid arthritis of unspecified site
- M05.29Rheumatoid vasculitis with rheumatoid arthritis of multiple sites
- M05.30Rheumatoid heart disease with rheumatoid arthritis of unspecified site
- M05.39Rheumatoid heart disease with rheumatoid arthritis of multiple sites
- M05.40Rheumatoid myopathy with rheumatoid arthritis of unspecified site
- M05.49Rheumatoid myopathy with rheumatoid arthritis of multiple sites
- M05.50Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified site
- M05.59Rheumatoid polyneuropathy with rheumatoid arthritis of multiple sites
- M05.60Rheumatoid arthritis of unspecified site with involvement of other organs and systems
- M05.69Rheumatoid arthritis of multiple sites with involvement of other organs and systems
- M05.70Rheumatoid arthritis with rheumatoid factor of unspecified site without organ or systems involvement
- M05.79Rheumatoid arthritis with rheumatoid factor of multiple sites without organ or systems involvement
- M05.7ARheumatoid arthritis with rheumatoid factor of other specified site without organ or systems involvement
- M05.80Other rheumatoid arthritis with rheumatoid factor of unspecified site
- M05.89Other rheumatoid arthritis with rheumatoid factor of multiple sites
- M05.8AOther rheumatoid arthritis with rheumatoid factor of other specified site
- M05.011Felty's syndrome, right shoulder
- M05.012Felty's syndrome, left shoulder
- M05.019Felty's syndrome, unspecified shoulder
- M05.021Felty's syndrome, right elbow
- M05.022Felty's syndrome, left elbow
- M05.029Felty's syndrome, unspecified elbow
- M05.031Felty's syndrome, right wrist
- M05.032Felty's syndrome, left wrist
- M05.039Felty's syndrome, unspecified wrist
- M05.041Felty's syndrome, right hand
- M05.042Felty's syndrome, left hand
- M05.049Felty's syndrome, unspecified hand
- M05.051Felty's syndrome, right hip
- M05.052Felty's syndrome, left hip
- M05.059Felty's syndrome, unspecified hip
- M05.061Felty's syndrome, right knee
- M05.062Felty's syndrome, left knee
- M05.069Felty's syndrome, unspecified knee
- M05.071Felty's syndrome, right ankle and foot
- M05.072Felty's syndrome, left ankle and foot
- M05.079Felty's syndrome, unspecified ankle and foot
- M05.111Rheumatoid lung disease with rheumatoid arthritis of right shoulder
- M05.112Rheumatoid lung disease with rheumatoid arthritis of left shoulder
- M05.119Rheumatoid lung disease with rheumatoid arthritis of unspecified shoulder
- M05.121Rheumatoid lung disease with rheumatoid arthritis of right elbow
- M05.122Rheumatoid lung disease with rheumatoid arthritis of left elbow
- M05.129Rheumatoid lung disease with rheumatoid arthritis of unspecified elbow
- M05.131Rheumatoid lung disease with rheumatoid arthritis of right wrist
- M05.132Rheumatoid lung disease with rheumatoid arthritis of left wrist
- M05.139Rheumatoid lung disease with rheumatoid arthritis of unspecified wrist
- M05.141Rheumatoid lung disease with rheumatoid arthritis of right hand
- M05.142Rheumatoid lung disease with rheumatoid arthritis of left hand
- M05.149Rheumatoid lung disease with rheumatoid arthritis of unspecified hand
- M05.151Rheumatoid lung disease with rheumatoid arthritis of right hip
- M05.152Rheumatoid lung disease with rheumatoid arthritis of left hip
- M05.159Rheumatoid lung disease with rheumatoid arthritis of unspecified hip
- M05.161Rheumatoid lung disease with rheumatoid arthritis of right knee
- M05.162Rheumatoid lung disease with rheumatoid arthritis of left knee
M05 at a glance
| Code | M05 |
|---|---|
| Description | Rheumatoid arthritis with rheumatoid factor |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with M05 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M05, but a patient may have both at the same time. When documentation supports it, M05 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 M05? (11)
- M05.0Felty's syndromenot billable
- M05.1Rheumatoid lung disease with rheumatoid arthritisnot billable
- M05.2Rheumatoid vasculitis with rheumatoid arthritisnot billable
- M05.3Rheumatoid heart disease with rheumatoid arthritisnot billable
- M05.4Rheumatoid myopathy with rheumatoid arthritisnot billable
- M05.5Rheumatoid polyneuropathy with rheumatoid arthritisnot billable
- M05.6Rheumatoid arthritis with involvement of other organs and systemsnot billable
- M05.7Rheumatoid arthritis with rheumatoid factor without organ or systems involvementnot billable
- M05.8Other rheumatoid arthritis with rheumatoid factornot billable
- M05.9Rheumatoid arthritis with rheumatoid factor, unspecified
- M05.AAbnormal rheumatoid factor and anti-citrullinated protein antibody with rheumatoid arthritis
How long has M05 existed?
M05 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.
Which codes are confused with M05?
ICD-10-CM declares these codes mutually exclusive with M05 — exactly one of each pair can be correct for a given encounter.