The Complete Guide to Billing MetroPlus Health Plan in 2026

:::info Quick answer The standard MetroPlus timely filing limit is 120 days from the date of service. For secondary claims, billers have 120 days from the date on the primary payer's Explanation of Benefits (EOB). Reconsiderations and appeals must be filed within 45 days of the initial remit date. :::

If you bill medical claims in the five boroughs of New York City, you deal with MetroPlus Health Plan. As the managed care arm of NYC Health + Hospitals, MetroPlus captures a massive share of the city's Medicaid, Medicare Advantage, and Essential Plan populations.

Handling their claims requires a specific cadence. They run a tight ship regarding filing limits, coordinate heavily with New York State Department of Health (DOH) regulations, and reject claims outright if your state enrollment data misses a single digit. Here is how to keep your MetroPlus claims out of the denial queue in 2026.

How MetroPlus Operates

MetroPlus is not a national commercial payer; it is deeply regional. Its network operations, fee schedules, and coverage rules mirror New York State Medicaid guidelines, even for their commercial and marketplace products.

Before you drop a claim, you need to identify the exact line of business on the patient's card. In 2026, MetroPlus divides its membership into several distinct buckets:

• Medicaid Managed Care (MMC): The largest segment. Reimbursement is typically tied to the New York State Medicaid fee schedule.
• Essential Plan (EP): New York's basic health program for low-income residents who do not qualify for Medicaid. Following the 2026 state income limit expansions, hundreds of thousands of members shifted from MMC to EP. You must verify eligibility on the exact date of service, as patients frequently transition between these two plans mid-month.
• Child Health Plus (CHP): Subsidized coverage for children under 19.
• Medicare Advantage and Dual Special Needs Plans (D-SNP): For members eligible for both Medicare and Medicaid. These require precise Coordination of Benefits (COB) billing.
• Health and Recovery Plan (HARP): Specialized Medicaid plans for adults with significant behavioral health needs.

Because MetroPlus is tied to NYC Health + Hospitals, referrals and prior authorizations for out-of-network or non-facility care face heavy scrutiny. If an in-network NYC H+H facility can provide the service, MetroPlus will rarely authorize an out-of-network exception.

Claim Submission and Timelines

Failing to watch the clock is the most common reason billers lose revenue here. The standard MetroPlus timely filing limit is 120 days from the date of service. If the patient is admitted to a facility, the clock starts on the date of discharge.

Missing this window results in a CO-29 denial (The time limit for filing has expired). Unlike some commercial payers that grant 180 or 365 days, MetroPlus enforces the 120-day rule aggressively.

Coordination of Benefits (Secondary Claims)

When MetroPlus is the secondary payer—most commonly acting as the Medicaid wrap-around for a Medicare Advantage primary plan—the filing rules shift slightly. You have 120 days from the date printed on the primary payer's Explanation of Benefits (EOB) or Electronic Remittance Advice (ERA) to submit the secondary claim to MetroPlus.

To get secondary claims paid electronically, your 837 file must contain perfectly balanced COB loops. The amount charged, minus the primary payer's paid amount, minus the primary payer's contractual adjustments (CAS segments), must equal the remaining balance. If your practice management system pushes unbalanced COB data, the MetroPlus EDI gateway will kick the claim back with a 999 functional rejection before it ever reaches the adjudication system.

Retroactive Eligibility

New York frequently grants retroactive Medicaid eligibility. A patient might walk into your clinic on March 1 as a self-pay patient, apply for Medicaid in May, and receive retroactive coverage back to February.

In these cases, you have 120 days from the date the eligibility was entered into the state system (the determination date). However, you cannot just send the claim electronically and expect it to pay. You must drop the claim to paper, attach the state's Notice of Decision letter proving the retroactive determination date, and mail it with a cover letter explicitly stating "Retroactive Eligibility - Override Timely Filing."

Clearinghouse and Payer IDs

MetroPlus uses Availity as its primary portal and clearinghouse partner in 2026.

• Electronic Payer ID: 13265
• Paper Claims Address: MetroPlus Health Plan, PO Box 8011, El Monte, CA 91734. (Note: Always verify the back of the member's 2026 ID card, as Medicare Advantage claims occasionally route to a different lockbox).

Do not rely on your clearinghouse's "Sent to Payer" status. Always pull the 277CA (Claim Acknowledgement) report to verify MetroPlus actually accepted the batch. A 277CA acceptance is the only documentation MetroPlus accepts as proof of timely filing if you need to appeal a CO-29 denial later.

MetroPlus Timelines Table

Enrollment and Credentialing

If your providers are not properly credentialed, your claims will deny with CO-109 (Claim not covered by this payer/contractor). MetroPlus credentialing is notoriously exacting because it stacks state rules on top of standard managed care rules.

The OPRA Requirement

To participate with MetroPlus for any Medicaid or Essential Plan line of business, the provider must be actively enrolled in the New York State Medicaid program under the OPRA (Ordering, Prescribing, Referring, Attending) mandate.

If a provider joins your practice, you cannot just add them to your MetroPlus roster. You must first ensure their NYS Medicaid Master Provider Index (MPI) number is active. If the state terminates their Medicaid ID for failing to revalidate, MetroPlus will immediately suspend their participating status and deny all pending claims.

CAQH and Roster Updates

MetroPlus relies heavily on CAQH ProView. Providers must re-attest their CAQH profiles every 120 days. If a profile expires, credentialing stalls.

For large groups submitting roster updates, MetroPlus requires a standardized Excel template via the provider portal. Adding a new provider to an existing group contract typically takes 60 to 90 days. Always bill under the rendering provider who actually performed the service. If you bill under the medical director while waiting for a new hire's credentialing to clear, you risk recoupments during a post-payment audit.

Terminations and Directory Updates

Under 2026 No Surprises Act enforcement, payer directories must be accurate. If a provider leaves your practice, you must notify MetroPlus within 30 days. Failing to remove terminated providers can result in contract penalties or delays in loading new providers to your group.

Denials and Appeals

When a claim denies, you need to act fast. MetroPlus gives providers a very short leash for disputes.

Corrected Claims

If a claim denies for a simple administrative error—such as an invalid diagnosis code pointer, a missing modifier, or truncated patient details—do not file an appeal. Submit a corrected claim.

Submit the corrected claim electronically using frequency code 7 (Replacement of prior claim) in the 2300 loop of the 837 file. You must include the original MetroPlus claim number (the Document Control Number, or DCN) in the REF*F8 segment. You have 60 days from the date of the original denial to submit a correction.

The Appeals Process

If you fundamentally disagree with a denial—for example, an authorization was on file but the claim denied for no auth, or you are fighting a timely filing denial with valid 277CA proof—you must file a formal appeal.

Providers have 45 days from the date of the remittance advice to file a Level 1 appeal.

1. Administrative Appeals: These cover billing disputes, timely filing overrides, and contract rate disagreements. Submit these via the MetroPlus Provider Portal. Upload your EOBs, clearinghouse acceptance reports, and a concise cover letter.
2. Clinical Appeals: These cover medical necessity denials, level-of-care downgrades, and experimental service rejections. Clinical appeals must include complete medical records, operative notes, and a letter of medical necessity from the rendering provider.

MetroPlus has 30 days to render a decision on a standard post-service appeal. If the Level 1 appeal is upheld, you may proceed to a Level 2 appeal, which is reviewed by a medical director not involved in the initial determination.

For Medicaid lines of business, if you exhaust the internal MetroPlus appeal process, the patient (or you, as their designated representative) has the right to request a Fair Hearing with the New York State Office of Temporary and Disability Assistance (OTDA). Fair Hearings are legal proceedings; you must bring undeniable proof of authorization, eligibility, and timely claim submission.

Overpayments and Refunds

If MetroPlus overpays a claim, or if a commercial primary payer retroactively pays a claim that MetroPlus already covered as primary, you must refund the money within 60 days of identifying the overpayment. Use the MetroPlus Overpayment Recovery form and submit a check. If you fail to refund the money voluntarily, MetroPlus will unilaterally offset the amount against your future remittance advices, causing massive reconciliation headaches for your accounting team.

Frequently asked questions

What is the MetroPlus timely filing limit for initial claims?

The standard timely filing limit for MetroPlus is 120 days from the date of service or date of inpatient discharge.

How long do I have to submit a secondary claim to MetroPlus?

You have 120 days from the date printed on the primary payer's Explanation of Benefits (EOB) or Remittance Advice to file the secondary claim.

What documentation proves I met the timely filing limit if my claim is denied?

MetroPlus only accepts an EDI 277CA (Claim Acknowledgement) report showing the claim was accepted at the payer level. Practice management ledgers or clearinghouse 'sent' statuses are not accepted as proof.

Can I bill MetroPlus if the provider is not enrolled in NYS Medicaid?

No. For any Medicaid or Essential Plan line of business, the rendering provider must be actively enrolled in New York State Medicaid under OPRA guidelines, even if they are in-network with MetroPlus.

What is the MetroPlus Payer ID for electronic claims in 2026?

The electronic payer ID for MetroPlus Health Plan is 13265.