M05.0 – Felty's syndrome
ICD-10-CM 2027 diagnosis code · Inflammatory polyarthropathies
ICD-10-CM code
M05.0
- Code
M05.0(claims format:M050)- Description
- Felty's syndrome
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
- Block
- M05-M14 Inflammatory polyarthropathies
- Parent codes
- M05
Billable codes under M05.0
M05.0 is a header code and cannot be used on claims. Choose the most specific code:
- M05.00 – Felty's syndrome, unspecified siteBillable
- M05.01 – Felty's syndrome, shoulderHeader (more codes below)
- M05.02 – Felty's syndrome, elbowHeader (more codes below)
- M05.03 – Felty's syndrome, wristHeader (more codes below)
- M05.04 – Felty's syndrome, handHeader (more codes below)
- M05.05 – Felty's syndrome, hipHeader (more codes below)
- M05.06 – Felty's syndrome, kneeHeader (more codes below)
- M05.07 – Felty's syndrome, ankle and footHeader (more codes below)
- M05.09 – Felty's syndrome, multiple sitesBillable
Notes for M05.0
Applicable to:
- Rheumatoid arthritis with splenoadenomegaly and leukopenia
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M05 – Rheumatoid arthritis with rheumatoid factor
Related codes in M05
- M05.1 – Rheumatoid lung disease with rheumatoid arthritisHeader
- M05.2 – Rheumatoid vasculitis with rheumatoid arthritisHeader
- M05.3 – Rheumatoid heart disease with rheumatoid arthritisHeader
- M05.4 – Rheumatoid myopathy with rheumatoid arthritisHeader
- M05.5 – Rheumatoid polyneuropathy with rheumatoid arthritisHeader
- M05.6 – Rheumatoid arthritis with involvement of other organs and systemsHeader
- M05.7 – Rheumatoid arthritis with rheumatoid factor without organ or systems involvementHeader
- M05.8 – Other rheumatoid arthritis with rheumatoid factorHeader
- M05.9 – Rheumatoid arthritis with rheumatoid factor, unspecifiedBillable
- M05.A – Abnormal rheumatoid factor and anti-citrullinated protein antibody with rheumatoid arthritisBillable
Frequently asked questions
What is ICD-10 code M05.0?
M05.0 is the ICD-10-CM code for felty's syndrome, in the block M05-M14 (Inflammatory polyarthropathies).
Is M05.0 a billable code?
No. M05.0 is a header code with more specific child codes; report one of the billable codes listed above.
What category does M05.0 belong to?
It belongs to category M05 – Rheumatoid arthritis with rheumatoid factor.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.