PR 178 denial code

Claim adjustment reason code 178. Often reported as PR 178.

Spend down not met

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 178 means

The patient had not yet met their spend down amount, a Medicaid rule in most cases, so the plan did not pay this service.

Some people qualify for Medicaid only after their medical bills reach a set amount for a period, called spend down. Until that amount is met, the plan does not pay, and the bills count toward reaching it.

The patient usually owes these charges. Once the spend down is met, later claims in the period may be paid.

Group codes seen with 178

On a remittance, 178 comes after a group code. These are the ones it is most often reported with:

• PR 178 (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.

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 patient's medical expenses for the period had not reached the spend down amount.
• Bills that count toward the spend down were not yet reported to the agency.
• The claim was processed before the spend down was recorded as met.

What to do next

1. Check the patient's spend down status with the Medicaid agency or payer.
2. Give the patient documentation of the charges so they can count them toward spend down.
3. Resubmit if the spend down was met by the date of service but not yet recorded.

Related codes

• 142 (reason code) Monthly Medicaid patient liability
• 177 (reason code) Eligibility requirements not met