Remark Code M123 on Your EOB — Meaning & What to Do
Remittance Advice Remark Code (RARC)
Remark codes add detail to a claim decision. They appear alongside the main adjustment codes on your Explanation of Benefits or remittance notice, giving the specific reason behind remark code M123.
Seeing remark code M123 on your EOB?
A denial code tells you what the payer reported, but it may not tell the whole story. Reviewing your EOB and bill together can help clarify what may need attention.
Related codes
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Frequently asked questions about Remark code M123
What does remark code M123 mean on my EOB?
The drug name, strength, or quantity information is missing.
What should I do about remark code M123?
Ask the provider's billing office to explain or correct this, and resubmit if needed.
Seeing this code on your own EOB?
Upload the EOB, the bill, or both — MD Bill Check reads the codes on your documents, compares them side by side, and flags what's worth questioning. Free, no account needed.