PR 33 denial code

Claim adjustment reason code 33. Often reported as PR 33 or CO 33.

Subscriber has no dependent coverage

Unofficial reference. This is our own plain-English explanation, not the official code text. Payer rules differ. Verify with the payer and the official X12 code list. AlphaPrefix is not affiliated with X12, CMS or any payer. Data last updated Nov 11, 2026.

What 33 means

The subscriber's policy covers only the subscriber, so the dependent patient on the claim has no coverage under it.

The subscriber has coverage, but the policy does not include dependents at all, for example an employee only plan. Any dependent billed under it will be denied with this code.

The dependent may have coverage elsewhere, such as under the other parent's plan or a government program.

Group codes seen with 33

On a remittance, 33 comes after a group code. These are the ones it is most often reported with:

• PR 33 (Patient Responsibility): The amount is assigned to the patient. Deductibles, coinsurance and copays are the everyday examples. Whether you can collect it still depends on your contract and the patient's plan.
• CO 33 (Contractual Obligation): The provider's side of the ledger. The reduction comes from the payer contract or a rule the provider has to follow, and the patient normally cannot be billed for it.

The payer chooses the group code for each adjustment, so the same reason code can appear with another group code on your remittance. Read the two together. More about group codes.

Common causes

• The subscriber chose employee only coverage and did not add family members.
• The claim was billed under the wrong parent's or spouse's policy.
• Dependent coverage was dropped at open enrollment or after a life event.

What to do next

1. Ask the family which plan covers the patient and verify it.
2. Bill the correct policy or subscriber if the dependent is covered elsewhere.
3. Correct the subscriber details and resubmit if the claim used the wrong subscriber.
4. Confirm the group code before moving any balance to the patient.

Related codes

• 32 (reason code) Patient not an eligible dependent
• 34 (reason code) Subscriber has no newborn coverage
• 22 (reason code) Another payer may be primary