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ICD-10 Code M05.779 - Rheumatoid arthritis with rheumatoid factor of unspecified ankle and foot without organ or systems involvement

Reviewed by Medicinsk Expert•Last updated: 2026-10-22•ICD Codes

ICD-10-CM Diagnosis Code M05.779

Diagnosis Code: M05.779 (Raw: M05779)

Description: Rheumatoid arthritis with rheumatoid factor of unspecified ankle and foot without organ or systems involvement

Classification: International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM)

Fiscal Year: 2026

CMS Section 111 Status: Valid for reporting.

Overview & Clinical Details

ICD-10-CM code M05.779 is designated for Rheumatoid arthritis with rheumatoid factor of unspecified ankle and foot without organ or systems involvement. In medical documentation and insurance billing, this code is utilized to specify medical diagnosis for patient records, reimbursement workflows, and compliance under CMS Section 111 mandatory insurer reporting guidelines.

Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.