Non-Billable / Non-Specific Code
ICD-10-CM M05.64 is the diagnosis code for Rheumatoid arthritis of hand with involvement of other organs and systems. 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.
Understanding where M05.64 sits in the ICD-10-CM classification helps ensure proper coding:
No, M05.64 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
M05.64 is the ICD-10-CM diagnosis code for "Rheumatoid arthritis of hand with involvement of other organs and systems". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of M05.64 is M05.6 ("Rheumatoid arthritis with involvement of other organs and systems"). M05.64 provides a more specific classification within this category.
M05.64 is located in Section M05-M14 — "Inflammatory polyarthropathies" within Chapter 13 of the ICD-10-CM Tabular List.
M05.64 has 3 sub-code(s) that provide more specific detail: M05.641, M05.642, M05.649.
Use M05.64 when the patients documented diagnosis matches "Rheumatoid arthritis of hand with involvement of other organs and systems" 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 of hand with involvement of other organs and systems is M05.64.
No, M05.64 is non-billable. Use a more specific sub-code for primary diagnosis billing.
M05.64 is in Chapter 13 of the ICD-10-CM Tabular List.
Yes, M05.64 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.