CO-140 Denial Code: Patient ID and Name Do Not Match

The CO-140 denial code means the patient's or insured's health identification number and name do not match the payer's records. The plan cannot confirm the member because the two identifiers disagree — the ID points to one person and the name to another, or one of them is simply mistyped. It is a pure data denial: nothing about the service is in question, only whether the claim names the member correctly.

What is the CO-140 denial code? CO-140 is a Claim Adjustment Reason Code (CARC) indicating the patient or insured health identification number and name on the claim do not match the payer's records, applied under the Contractual Obligation group until the identifiers are corrected.

Undeny's Take

CO-140 is the most fixable denial there is, and the most preventable — it lives entirely in the registration data. The ID and the name are supposed to identify the same person, and when they don't, it is almost always a keystroke story: a transposed member ID, a maiden name the payer still has on file, a Jr./Sr. or hyphenated-name mismatch, or the subscriber's name entered where the dependent's belonged. None of that requires an appeal; it requires comparing the claim to the insurance card and the payer's eligibility record and fixing the field that drifted. The lasting fix is upstream: capture the name exactly as it appears on the card at registration, because CO-140 is a front-desk accuracy problem that surfaces as a billing denial.

What CO-140 Means

CO-140 reports that the member's health ID number and name on the claim do not correspond to the same person in the payer's records. The plan validates the subscriber or patient by matching both identifiers; when they conflict, it cannot confirm eligibility and returns the claim. Under the Contractual Obligation group, the amount is the provider's responsibility until the identifiers are corrected, not a patient charge.

Why the ID and Name Disagree

A typo or transposition in the member ID number or the patient name.
A name change — marriage or divorce — not yet reflected in the payer's records.
Name variations, suffixes, or hyphenation that do not match the card on file.
The subscriber's and dependent's information entered in the wrong fields.

How to Fix a CO-140

Compare the member ID and name on the claim against the insurance card and the payer's eligibility record.
Identify which identifier drifted — the ID number, the spelling, or a name change not on file.
Correct the field to match the payer's records exactly and refile the claim.
If the payer's record is outdated after a legitimate name change, have it updated, or dispute a correctly identified claim with the appeal generator.

Related Codes

CO-140 is an eligibility and data denial alongside CO-16 (claim lacks information needed for adjudication) and CO-27 (expenses after coverage terminated). Browse the full set under denial codes.

Frequently Asked Questions

What does CO-140 mean?

CO-140 means the patient or insured health identification number and name on the claim do not match the payer's records. The plan cannot confirm the member because the ID and the name point to different information.

Is CO-140 a coding denial?

No. It is a demographic data denial — the service and codes are not in question, only the member identification. The fix is correcting the ID number or name to match the payer's records.

Can I bill the patient for a CO-140?

No. CO-140 carries the Contractual Obligation group, so the amount is a provider write-off until the identifiers are corrected. Fix the data and refile rather than billing the patient.

How do I prevent CO-140 denials?

Capture the patient and subscriber names exactly as shown on the insurance card at registration, verify the member ID, and update records after name changes. Most CO-140 denials come from registration keystroke errors or outdated names.

Informational only — not legal, medical, or billing advice. Always verify against current payer eligibility records.

Fix CO-140 denials automatically

Undeny pinpoints the mismatched identifier and drafts the corrected claim in seconds. Generate an appeal · Browse denial codes