Denial codes · Denial code
CO-96 on a nutrition claim: non-covered charge, and the remark code says why
By Javier Alvarez · Updated · 5 min read
| Official description | Non-covered charge(s). |
|---|---|
| X12 rule | At least one remark code must be provided |
| Group code | CO: the provider carries it (compare PR-204, where the patient does) |
| Common remark codes | N130, N216, N428, N95, N425 |
| First check | Diagnosis, benefit (preventive vs medical), POS and code before accepting it |
| Fix route | Corrected claim if miscoded; appeal if the plan covers it; otherwise write off |
CO-96 is the vaguest denial on a nutrition remit, and the one where the group code hurts the most. "Non-covered charge" alone tells you almost nothing; the CO in front tells you that, as the payer sees it, you absorb the amount. The good news is that X12 forces the payer to say more: CARC 96 cannot travel alone. The remark code next to it is the actual diagnosis.
What CO-96 means (official X12 wording)
The X12 Claim Adjustment Reason Code list defines CARC 96 as:
"Non-covered charge(s)."
The usage note is the important part: "At least one Remark Code must be provided (may be comprised of either the NCPDP Reject Reason Code, or Remittance Advice Remark Code that is not an ALERT.)" It also points to the 835's Healthcare Policy Identification segment (loop 2110 REF), where some payers name the policy behind the decision.
Read the remark code first
| Remark code | Official X12 description | What it usually means on an MNT claim |
|---|---|---|
| N130 | "Consult plan benefit documents/guidelines for information about restrictions for this service." | The plan limits or excludes nutrition counseling; read the plan's documents |
| N216 | "We do not offer coverage for this type of service or the patient is not enrolled in this portion of our benefit package." | Nutrition is outside this member's benefit package |
| N428 | "Not covered when performed in this place of service." | Often a telehealth POS (02 or 10) the plan does not pay for this service |
| N95 | "This provider type/provider specialty may not bill this service." | The plan does not pay RDs for this code (see also CO-170) |
| N425 | "Statutorily excluded service(s)." | Medicare: the service is outside the Medicare benefit |
If the remit shows no usable remark code, check the claim detail in the payer portal or call. Ask for the specific policy or plan provision.
The usual causes on nutrition claims
1. The plan excludes or limits nutrition counseling
Some employer plans, especially self-funded ones, exclude nutrition counseling entirely or cover it only for listed conditions. The insurer's name on the card does not tell you what the employer bought; the plan document does (billing self-funded ERISA plans). Weight-management exclusions are common: a plan may cover MNT for diabetes but exclude it when the only diagnosis is obesity. When the plan puts the amount on the patient, you see PR-204; when it puts it on you, CO-96.
2. The wrong benefit was hit
Many plans cover nutrition counseling under the ACA preventive benefit for certain risk factors, and separately under the medical benefit for conditions like diabetes or kidney disease, each with its own diagnosis rules. A claim that lands on the wrong side of that line can read as non-covered. Preventive vs medical benefits explains how diagnosis order decides which benefit a claim hits.
3. Telehealth not covered for that service or place of service
With N428, check the place of service and modifier. Some plans pay nutrition visits only in person, or only with a specific POS and modifier combination, and a few changed their rules as pandemic-era flexibilities ended. See telehealth billing for dietitians.
4. A code the plan does not pay RDs for
Preventive counseling codes (99401-99404), obesity counseling (G0447) or E/M codes billed under an RD's NPI often come back as non-covered for that provider type. See 99401-99404 and G0447 for who can bill what.
5. Medicare outside the MNT benefit
Medicare covers MNT only for diabetes and kidney disease, on a physician's referral. CMS's manual tells contractors to deny MNT claims without a diabetes or renal diagnosis under section 1862(a)(1)(A) of the Act (Pub. 100-04, Ch. 4 §300.5), which usually reaches you as a medical-necessity or diagnosis denial rather than CO-96. Other nutrition services Medicare never covers can come back as non-covered with N425.
How to fix a CO-96
- Read the remark code and the policy reference. Identify which of the causes above applies.
- Rule out a billing cause. Is the primary diagnosis one the plan covers for nutrition? Did the claim use the benefit (preventive or medical) that matches the visit? Is the POS/modifier the plan's telehealth combination? Is the code one the plan pays RDs for?
- If the claim was miscoded and the record supports a covered way of billing it, send a corrected claim (frequency code 7 with the original claim number). Never change a diagnosis just to get paid; it has to be documented.
- If the plan does cover it as billed, appeal with the plan language or medical policy and the visit note. Quote the policy by name and date.
- If it is a genuine exclusion, check your contract before touching the patient balance. With a CO group code, in-network providers generally cannot bill the member unless the contract allows it and the patient agreed in writing before the visit.
- For Medicare, patient liability follows ABN rules: for services that may be denied as not reasonable and necessary, you need a valid ABN signed before the service.
How to prevent CO-96
- Verify nutrition benefits specifically, not just active coverage: is MNT covered, for which diagnoses, under which benefit, in person and by telehealth, and by an RD? The benefits verification checklist covers most of these questions.
- Get a reference number for every benefits call. If the plan quoted coverage and then denied, that call is your appeal; see when the payer quoted the wrong benefits.
- Have patients sign a financial policy at intake that explains what happens if their plan does not cover a service, and learn which of your contracts allow member billing for non-covered services.
- Keep a per-payer sheet of covered codes, diagnoses and telehealth rules for nutrition, and update it when a remit surprises you. Our free Blue Cross and Aetna billing cheat sheets are a starting point.
For the patient-responsibility version of this denial, see PR-204. For every other code, see the denial code lookup.