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CO-176 Denial Code: Prescription Is Not Current

CO-176 means the prescription supporting the claim was not current on the date of service. It may have expired, exceeded its length of need, or been replaced by a newer order the payer requires. A current prescription is needed before the service can be paid.

Quick facts

Code
CO-176 (CARC 176)
Status
Active In use since June 30, 2005; last modified September 30, 2007.
Code set
Claim Adjustment Reason Codes (CARC)
Group codes
  • CO (Contractual Obligation): The provider or supplier is responsible for services delivered on an expired order. Not billable to the patient.
Official description
Prescription is not current.
X12 Claim Adjustment Reason Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What CO-176 means

CARC 176 reads “Prescription is not current.” An order existed at some point, but it wasn’t valid on the date of service. Orders can stop being current because the prescriber’s stated length of need ran out, the payer requires renewal after a set period, the patient’s condition or regimen changed, or a plan of care needed recertification.

This denial is most common on recurring services: monthly supply shipments, DME rentals, oxygen, home infusion, and ongoing therapy.

Example: a supplier ships diabetic supplies every 90 days. The original order specified a length of need of 12 months. The fifth shipment goes out after the order has lapsed and is denied CO-176.

Common causes

  • Length of need expired and no renewal was obtained.
  • Payer renewal rules requiring a new order after a set time for certain items.
  • Plan of care expired for therapy or home health, and recertification was late.
  • Change in the patient’s regimen, making the old order outdated.
  • Automatic reorders that don’t check order status before shipping.

How to fix it

  1. Check the order dates and length of need against the date of service in box 24A.
  2. Obtain a current order from the prescriber for future services.
  3. If a renewal existed but wasn’t on file, get a copy and appeal or resubmit with it.
  4. If the service date was wrong, submit a corrected claim with resubmission code 7.
  5. For services truly delivered on an expired order, write off the CO amount unless the payer offers a remedy.

How to prevent it

  • Track order expiration dates in your system and request renewals well before they lapse.
  • Block automatic shipments when the order has expired.
  • Calendar therapy recertification dates based on the plan of care.
  • Communicate with prescribers on a regular renewal schedule for long-term patients.
  • Watch for recurring CO-176 on the same patients or items as a sign your renewal workflow is broken. ERA Analyzer can group denials by code and patient to show this.

Specialty notes

DME and supply companies are most exposed. For PT/OT, a lapsed plan of care certification can produce similar denials under different codes depending on the payer, so confirm how each payer reports it.

Remark codes that may appear with CO-176

  • N668 (Incomplete/invalid prescription.): The prescription is considered incomplete or invalid, which includes being out of date.
  • N331 (Missing/incomplete/invalid physician order date.): The order date is missing or invalid, so the payer cannot confirm it was current.
  • CO-174 (Service was not prescribed prior to delivery.): The prescription was written after the item was delivered.
  • CO-175 (Prescription is incomplete.): The prescription is missing required elements.
  • CO-173 (Service/equipment was not prescribed by a physician.): There is no valid prescription from an eligible prescriber at all.

CO-176 FAQ

How long is a prescription or order valid?

It depends on the payer, the item, and the length of need the prescriber wrote. Some supplies and rentals need periodic renewal, and therapy plans of care often need recertification. Check the payer's policy for the item.

Can I get a new prescription and rebill old dates?

A new order generally supports services from its date forward. It usually doesn't cover past deliveries made while the order was expired, unless the payer's rules allow it.

What's the difference between CO-176 and CO-174?

With CO-174 the order came after delivery. With CO-176 an order existed but had already lapsed by the date of service.

Should I stop shipping when an order expires?

Generally hold further deliveries until a current order is on file, unless the payer's policy allows a grace period. Shipping on an expired order puts the supplier at risk for the full cost.