Remark Code M38 on Your EOB — Meaning & What to Do
Remittance Advice Remark Code (RARC)
What remark code M38 means: This service requires prior authorization that wasn't obtained.
What to do about remark code M38: If you believe this is wrong, you can appeal with supporting notes from your doctor.
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 M38.
Related codes
RARC M25The information doesn't support the need for this service.
RARC M39This service isn't covered because it's considered routine.
RARC M16Refer to the payer's bulletin or notice for more details.
RARC M51The procedure code is missing, incomplete, or invalid.
Keep reviewing your bill
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- How to Dispute a Medical Bill — Find Billing Errors Before You Pay
Frequently asked questions about Remark code M38
What does remark code M38 mean on my EOB?
This service requires prior authorization that wasn't obtained.
What should I do about remark code M38?
If you believe this is wrong, you can appeal with supporting notes from your doctor.
Found this code on your bill or EOB?
Upload the document — MD Bill Check decodes every code, checks the math line by line, and explains what's worth questioning.