M05.00 – Felty's syndrome, unspecified site
ICD-10-CM 2027 diagnosis code · Inflammatory polyarthropathies
ICD-10-CM code
M05.00
- Code
M05.00(claims format:M0500)- Description
- Felty's syndrome, unspecified site
- Billable
- Yes – valid for HIPAA-covered transactions
- 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 › M05.0
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
Excludes1 (not coded here):
M05.0 – Felty's syndrome
Applicable to:
- Rheumatoid arthritis with splenoadenomegaly and leukopenia
Index terms for M05.00
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in M05.0
- M05.01 – Felty's syndrome, shoulderHeader
- M05.02 – Felty's syndrome, elbowHeader
- M05.03 – Felty's syndrome, wristHeader
- M05.04 – Felty's syndrome, handHeader
- M05.05 – Felty's syndrome, hipHeader
- M05.06 – Felty's syndrome, kneeHeader
- M05.07 – Felty's syndrome, ankle and footHeader
- M05.09 – Felty's syndrome, multiple sitesBillable
Frequently asked questions
What is ICD-10 code M05.00?
M05.00 is the ICD-10-CM code for felty's syndrome, unspecified site, in the block M05-M14 (Inflammatory polyarthropathies).
Is M05.00 a billable code?
Yes. M05.00 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does M05.00 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.