Nevada Medicaid gives in-state providers 180 days from the date of service to file a claim, according to the Nevada Medicaid billing manual. Out-of-state providers get 365 days. Claims where another insurer pays first also get 365 days. Managed care organizations (MCOs) set their own limits in their provider contracts. When a patient is enrolled in a plan, the plan's limit applies instead of the state rule. This guide lists each deadline as of October 2026, along with the rules for corrected claims, secondary claims, and appeals. For the full billing process, see how to bill Nevada Medicaid.
Timely Filing Limits by Payer (October 2026)
| Payer | Initial Claim (In-State) | Out-of-State | Other Insurance Primary | Corrected Claims | Source |
|---|---|---|---|---|---|
| Nevada Medicaid (fee for service) | 180 days from date of service or eligibility decision, whichever is later | 365 days | 365 days | Same limits apply; reference the last paid ICN | Nevada Medicaid billing manual and web announcement 2531 |
| Anthem Blue Cross and Blue Shield Healthcare Solutions | 180 days (participating and non-participating) | 365 days for non-participating out-of-state providers | Counted from the other carrier's payment or denial date | Not stated in the policy | Anthem Nevada Medicaid policy (effective 3 June 2025) |
| CareSource | 180 days from date of service or eligibility decision | 365 days | 365 days; if passed, primary payer proof within 60 days of its payment or denial | Treated as a new claim within the 180 days | CareSource Nevada Medicaid provider manual |
| SilverSummit Healthplan | 180 days from date of service or eligibility | Not specified in the manual | 365 days | 60 days from the remittance date | SilverSummit billing manual (July 2026) |
| Molina Healthcare of Nevada | Check plan manual | Check plan manual | Check plan manual | Check plan manual | Molina Nevada Medicaid provider manual |
| Health Plan of Nevada | Check plan manual | Check plan manual | Check plan manual | Check plan manual | Health Plan of Nevada provider manual |
How the Filing Clock Is Counted
The Nevada Medicaid billing manual counts the days between the last date of service and the date Gainwell Technologies receives the claim. If eligibility is decided later, the clock starts on the eligibility decision date instead.
Here is an example using the counting rule in the Nevada Medicaid billing manual. A provider sees a patient on 15 March 2026. Gainwell receives the claim on 10 September 2026. The claim is 179 days old, so it meets the 180-day limit. Now suppose the patient's eligibility is backdated to 1 April 2026 after an appeal. In that case, the 180 days start on 1 April.
A first denial does not restart the clock. Suppose a claim is denied for a fixable error, such as a missing modifier. The corrected claim must still arrive within the original window, counted from the date of service.
Service date
March 15, 2026
179 days
Meets 180-day limit
Claim received
September 10, 2026
Limits for Each Managed Care Plan
The state's 180-day rule does not govern claims for patients enrolled in a plan. Before you file, confirm the patient's plan using our guide to Nevada Medicaid plans by county.
Anthem Blue Cross and Blue Shield Healthcare Solutions. The Anthem Nevada Medicaid policy allows 180 days from the date of service for participating and non-participating providers. Out-of-state non-participating providers have 365 days.
CareSource. The CareSource provider manual matches the state rule: 180 days from the date of service or eligibility decision. Out-of-state providers have 365 days. CareSource uses payer ID NVCS1.
SilverSummit Healthplan. The SilverSummit July 2026 billing manual allows 180 days from the date of service or eligibility determination. SilverSummit uses payer ID 68069. The manual does not list a separate out-of-state limit.
Molina Healthcare of Nevada and Health Plan of Nevada. We have not confirmed these limits from a current published source. Check each plan's provider manual, or call provider services, before filing an older claim.
Corrected Claims, Adjustments and Voids
Fee-for-service adjustments follow the same 180-day and 365-day limits as first claims. On the adjustment, reference the internal control number (ICN) from the last paid claim.
The plans handle corrections differently:
- CareSource treats a corrected claim as a new claim, per its provider manual. It must arrive within the first 180-day window.
- SilverSummit gives you 60 days from the remittance advice date, per its billing manual.
- Anthem, Molina, and Health Plan of Nevada do not state a corrected-claim window in the sources we reviewed.
A void cancels the original claim. Any replacement must be filed as a new claim within the timely filing limit.
When Another Insurer Pays First
For fee-for-service claims, the 365-day window starts on the date of service. It does not start on the date the primary payer sent its explanation of benefits. Attach the primary payer's remittance advice to the Nevada Medicaid claim.
The plans count this window in different ways:
- Anthem starts counting from the date the other carrier paid or denied the claim. A slow primary payer can therefore extend your window.
- CareSource gives you 60 days after the primary payer's decision if the 365 days have already passed. You must include proof of that decision.
- SilverSummit allows 365 days.
Appeals and Fair Hearings
The Nevada Medicaid claim appeals guide requires an appeal postmarked within 30 calendar days of the remittance advice showing the denial. Include the claim number, the date of service, the reason for the appeal, and supporting records. If the appeal is denied, you may request a fair hearing within 90 days of the decision notice.
That appeals guide dates from 2016, so confirm the current deadlines with Gainwell Technologies before you appeal. Each plan publishes its own appeal steps in its provider manual.
- 01
Claim denied
Remittance advice shows denial
- 02
30-day appeal
Postmarked within 30 calendar days
- 03
90-day fair hearing
If appeal is denied: request within 90 days of the decision notice
How to Prevent Late Claims
A claim received after the limit is denied for timely filing, and Nevada Medicaid will not pay it. These habits keep claims inside the window:
- Submit claims within seven days of the visit. This leaves time to fix rejections.
- Work rejections the same day they arrive. The clock keeps running while a rejection waits.
- Track backdated eligibility. Use the eligibility decision date as the start of the window.
- Flag out-of-state and other-insurance claims. They follow the 365-day limit.
- Review your aging report every week. Give priority to any claim older than 150 days.
- Confirm plan enrollment before filing. The plan's limit may differ from the state's.
Have claims close to their deadline? Nevada Med Billing offers a free aged A/R review. Contact us to request one.
Recovering Old Nevada Medicaid A/R
Claims past the limit cannot be billed to Nevada Medicaid or the plan. An audit often finds other problems, though. Some claims were miscoded, sent to the wrong payer, or never submitted. Nevada Med Billing handles A/R follow up and old A/R recovery for Nevada practices. We review your aging report, correct and resubmit billable claims, and work denials through to payment.
Frequently Asked Questions
Can I bill the patient if a claim is denied for late filing? No. Providers who accept Nevada Medicaid agree not to bill patients for covered services. A timely filing denial must be written off.
Where do I find the date a patient's eligibility was approved? Check eligibility in the Nevada Medicaid provider portal, or call the Gainwell Technologies provider line. If coverage was backdated, keep a copy of the determination letter in the patient's file.
Does a rejected claim stop the filing clock? No. A rejection means the claim was never accepted, so the original deadline still applies.