Non-Billable / Non-Specific Code
ICD-10-CM M05 is the diagnosis code for Rheumatoid arthritis with rheumatoid factor. This code falls under the section "Inflammatory polyarthropathies" within Chapter 13 — Diseases of the musculoskeletal system and connective tissue (M00-M99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as M05. They are mutually exclusive:
Understanding where M05 sits in the ICD-10-CM classification helps ensure proper coding:
No, M05 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
M05 is the ICD-10-CM diagnosis code for "Rheumatoid arthritis with rheumatoid factor". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
M05 is located in Section M05-M14 — "Inflammatory polyarthropathies" within Chapter 13 of the ICD-10-CM Tabular List.
M05 has 11 sub-code(s) that provide more specific detail: M05.0, M05.1, M05.2, M05.3, M05.4 and more.
Use M05 when the patients documented diagnosis matches "Rheumatoid arthritis with rheumatoid factor" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Rheumatoid arthritis with rheumatoid factor is M05.
No, M05 is non-billable. Use a more specific sub-code for primary diagnosis billing.
M05 is in Chapter 13 of the ICD-10-CM Tabular List.
Type 1 Excludes for M05 include: rheumatic fever (I00); juvenile rheumatoid arthritis (M08.-); rheumatoid arthritis of spine (M45.-).
Yes, M05 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.