# What Is a Clean Claim in Medicaid Billing? Meaning and NEMT Examples

Canonical URL: https://nemtguide.com/glossary/clean-claim/ · Updated 2026-09-29

A clean claim is a claim the payer can process without asking you or anyone else for more information. Under federal Medicaid rule 42 CFR 447.45, the 30 and 90 day payment standards count from the day the state receives one. A NEMT claim is usually unclean when it lacks a valid member ID, the trip or authorization number, the right codes and modifiers, or the rider's signature.

- Federal Medicaid rules define a clean claim as one that can be processed without more information from you or a third party.
- The 30 and 90 day payment standards count from the date the payer receives a clean claim, so a claim with missing details loses that protection.
- A claim from a provider under fraud investigation, or under medical necessity review, is never a clean claim.
- Brokers can add their own tests: MTM Health's Virginia handbook requires the trip ID, four trip times, and the member's signature.
- A clean claim can still be denied, so match every claim to the trip record, the authorization, and the rider's eligibility.

## What a clean claim means

Federal Medicaid rule [42 CFR 447.45(b)](https://www.ecfr.gov/current/title-42/chapter-IV/subchapter-C/part-447/subpart-A/section-447.45) defines a clean claim as "one that can be processed without obtaining additional information from the provider of the service or from a third party." The definition has three parts:

- **It can be processed as sent.** Nobody has to call you, write to you, or ask another payer for anything.
- **The state's own errors do not count against you.** A claim with errors that started in the state's claims system is still clean.
- **Two kinds of claims are never clean.** A claim from a provider under investigation for fraud or abuse, and a claim under review for medical necessity.

The same rule defines a claim as a bill, a single line item, or all services for one rider within a bill. Each state's Medicaid state plan says which of those it uses to measure its payment speed, and the choice can differ by type of service.

States can write the definition into their own law. Arizona's Medicaid statute, A.R.S. 36-2904(G), defines clean claims in nearly the same words for AHCCCS and its health plans.

## Why a clean claim starts the payment clock

The 30 and 90 day deadlines only protect clean claims. They count from the date of receipt, which the rule defines as the date the agency stamps on the claim. The date of payment is the date of the check or other payment.

| Who pays you | Deadline for clean claims | Rule |
|---|---|---|
| State Medicaid, fee-for-service | 90 percent of clean claims from practitioners within 30 days of receipt, 99 percent within 90 days. All other claims within 12 months. | 42 CFR 447.45(d) |
| Medicaid health plan | The same 30 and 90 day standards, unless the plan and its providers agree to a different schedule written into the contract | 42 CFR 447.46 |
| NEMT broker | Whatever your agreement says. Verida pays Indiana clean claims received by Wednesday within 14 days. MTM Health's standard agreement, in the January 1, 2023 version Pennsylvania posts, pays uncontested invoices within 30 days after online submission. Georgia requires 15 business days for undisputed invoices unless the service agreement says otherwise. | Your broker agreement and state broker rules |
| Medicare, for ambulance suppliers | 95 percent of clean claims within 30 calendar days, with interest after that | 42 U.S.C. 1395u(c)(2) |

The 30 and 90 day standards are measured across all of a state's claims and are written for practitioners, so no single NEMT claim is promised payment in 30 days. For every other claim the federal outer limit is 12 months. See [how long Medicaid takes to pay](https://nemtguide.com/guides/how-long-medicaid-takes-to-pay/) for state payment calendars and broker cycles.

Filing limits use the idea too. Arizona requires a claim to be first submitted within six months of the date of service and to reach clean claim status within 12 months, counted from the later of the service date or the date eligibility posts. See [timely filing limits](https://nemtguide.com/glossary/timely-filing-limit/) for other states.

## What makes a NEMT claim unclean

Before paying any claim, a state must check that the rider was eligible, that you were authorized to give the service, that the claim does not duplicate another, that it stays within the state's rates, and whether other insurance should pay first (42 CFR 447.45(f)). Most unclean NEMT claims fail one of those checks, or miss a field the payer requires.

| What is missing or wrong | An example payer rule |
|---|---|
| Member ID | Texas wants the 10-digit patient number from the ride's authorization form in box 1a (handbook, September 2026) |
| Trip or authorization number | Texas puts the prior authorization number in box 23. New York wants the 11-digit number from the transportation roster (billing guidelines, version 2026-02, August 5, 2026). |
| Trip log data | MTM Health's Virginia handbook requires the trip ID, the scheduled pickup, actual pickup, departure, and arrival times, the member's signature, and a completed trip status |
| Codes and modifiers | Indiana puts [origin and destination modifiers](https://nemtguide.com/glossary/origin-destination-modifiers/) on the base line and the mileage line |
| Mileage units | Indiana and South Dakota require whole miles. New York requires tenths of a mile for dates of service since August 1, 2019, and warns that rounded-up miles may be treated as fraud and recovered. |
| Addresses | South Dakota requires the pickup and drop-off addresses on every transportation claim |
| Provider details | Texas asks for your complete name, address, and provider identifier to avoid processing delays, and recommends taxonomy 343800000X for demand response providers |
| Diagnosis code | Texas requires Z753 on every Medical Transportation Program claim |
| Same-day trips split up | Indiana wants all of one member's rides on the same date billed together on one claim |

These standard adjustment reason codes on a remittance can point to one of those gaps:

- **Code 31:** "Patient cannot be identified as our insured."
- **Code 197:** "Precertification/authorization/notification/pre-treatment absent."
- **Code 4:** "The procedure code is inconsistent with the modifier used."
- **Code 18:** "Exact duplicate claim/service."

A broker can set its own test. MTM Health's Virginia handbook says a clean claim "refers to the supporting data submitted with the trip id at time of submission." If any of its required data points is missing, or the trip is no longer in a completed status, the claim is denied. Providers have 6 months from the date of service to submit a clean claim and 365 calendar days to appeal a denial.

## What happens when a claim is not clean

There are two outcomes, and they need different fixes.

- **Rejected as unprocessable.** Remark code MA130 reads: "Your claim contains incomplete and/or invalid information, and no appeal rights are afforded because the claim is unprocessable. Please submit a new claim with the complete/correct information." Texas, for example, rejects every claim from a provider whose enrollment is pending until its atypical provider identifier is issued.
- **Denied for missing information.** Reason code 16 reads "Claim/service lacks information or has submission/billing error(s)." It must come with at least one remark code that names the problem.

Either way, the clock that protects clean claims never started. Fix the claim and send it again as soon as you can, because your filing limit keeps running. See [corrected NEMT claims](https://nemtguide.com/guides/corrected-nemt-claims/) for how to resubmit, and [NEMT claim denials](https://nemtguide.com/guides/nemt-claim-denials/) for the most common denial reasons.

A clean claim can still be denied on its merits. Reason code 29, "The time limit for filing has expired," and code 27, "Expenses incurred after coverage terminated," are two examples.

## How to send clean NEMT claims

1. **Check eligibility before every ride.** A rider can gain or lose coverage between trips. See [eligibility verification](https://nemtguide.com/glossary/eligibility-verification/).
2. **Get the trip number first.** MTM Health tells Virginia providers never to transport a member without its unique trip ID.
3. **Complete the trip record at the ride.** Record the times, the signature, and the miles from the odometer or mapping software, as Indiana requires. See [NEMT trip documentation](https://nemtguide.com/guides/nemt-trip-documentation/).
4. **Match the codes to the ride.** Use the base code for the level of service, the mileage code, and every modifier your payer lists.
5. **Check your own details.** Your NPI, taxonomy, and billing address should match your Medicaid enrollment.
6. **Bill each rider's day together** where your payer asks, and search for duplicates before you send.
7. **Track the receipt date.** Save the acceptance report for each batch, so you know when each claim's payment clock started.

## Frequently asked questions

### What is the federal definition of a clean claim?

Under 42 CFR 447.45(b), a clean claim is "one that can be processed without obtaining additional information from the provider of the service or from a third party." It includes a claim with errors that started in the state's own claims system. It does not include a claim from a provider under investigation for fraud or abuse, or a claim under review for medical necessity.

### Does a clean claim always get paid?

No. Clean means the payer has what it needs to decide. It can still deny the claim, for example when the rider was not eligible that day, the trip had no authorization, or the filing limit passed. Federal rules require states to check eligibility, provider authorization, duplicates, rate limits, and other insurance before paying any claim.

### How long does Medicaid have to pay a clean claim?

A state must pay 90 percent of clean claims from practitioners within 30 days of receipt and 99 percent within 90 days, measured across all claims. Every other claim must be paid within 12 months. Health plans follow the same 30 and 90 day standards unless the contract sets another schedule. Brokers pay on their agreement's terms, such as within 14 days for Verida's Indiana clean claims received by Wednesday.

### Is the Medicare definition of a clean claim different?

The wording is. Medicare defines a clean claim as one with "no defect or impropriety (including any lack of any required substantiating documentation) or particular circumstance requiring special treatment that prevents timely payment." Its contractors must pay 95 percent of clean claims within 30 calendar days and owe interest after that. It matters for NEMT companies that also bill Medicare as ambulance suppliers.

### What happens when my claim is not clean?

The payer either rejects it or denies it and tells you what is missing. A rejected claim with remark code MA130 is unprocessable and has no appeal rights, so you send a new claim with the correct information. A denial with reason code 16 means the claim lacks information or has a billing error, and it comes with a remark code that names the problem.

## Official resources

- [eCFR: 42 CFR 447.45, Timely claims payment](https://www.ecfr.gov/current/title-42/chapter-IV/subchapter-C/part-447/subpart-A/section-447.45)
- [X12: Claim Adjustment Reason Codes](https://x12.org/codes/claim-adjustment-reason-codes)
- [X12: Remittance Advice Remark Codes](https://x12.org/codes/remittance-advice-remark-codes)