M13.8

Non-billable

Other specified arthritis

M13.8 is the ICD-10-CM code for Other specified arthritis. It is a non-billable category code — use a more specific child code such as M13.80 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Parent
M13
Subcodes
10
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

Includes

  • Allergic arthritis

Excludes1 — not coded here

Frequently asked questions

What is ICD-10 code M13.8?
M13.8 is the ICD-10-CM code for "Other specified arthritis". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M13.8 a billable code?
No — M13.8 is a non-billable header code. Use a more specific child code (such as M13.80) for billing.
What are the subcodes of M13.8?
M13.8 has 10 more specific child codes, including M13.80, M13.81, M13.82.
What is excluded from M13.8?
Excludes1 (not coded here): osteoarthritis (M15-M19).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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