Timely Filing Deadline Calculator (2027): The Last Day to File a NEMT Claim

What the timely filing calculator does

Every payer sets a last day to receive your claim for a ride. Miss it and the claim is denied, and unless an exception applies, you drove that trip for nothing. That last day is the timely filing limit, and it is usually counted from the date of service, the day of the ride.

The calculator turns a date of service and a limit into a calendar date. It adds the payer’s limit in days, handles month ends and leap years, and shows how many days are left from today. Use it for a single claim you are worried about, or to set the date by which each week’s rides must be billed.

It also works for the other clocks on a claim. To count a deadline that starts on another day, such as the date on a denial notice, put that date in the date of service box.

How to use the calculator

1. Enter the date of service, the day of the ride, as it goes on the claim.
2. Enter the payer’s time limit in days. If the payer writes it in months, use the table below.
3. Leave today’s date as it is. The box fills in with your own date when the page opens.
4. Read the last day to file or correct the claim, and the days left.

The results change as you type. Reset to example puts the example dates back, and Show the formula lists the math. If the last day has passed, the calculator says how many days ago.

What each box means

Box	What to enter	Where to find it
Date of service	The day of the ride	Your trip log, or the date on the claim line
Payer’s time limit	The days the payer allows to receive the claim	Your state Medicaid provider manual, your broker agreement, or the health plan’s provider manual
Today’s date	Filled in for you	Change it to see how many days a claim will have left on another day, such as your next billing day

The limit is the number for the payer that pays that trip. If a broker pays you, its agreement sets the limit, even when the state’s own limit is longer.

Turn the payer’s limit into days

The calculator counts calendar days. Payers write their limits in days, in months, or in months after the month of service. Enter the number from this table, and the date comes out on or before the real last day, never after it.

The payer’s limit reads	Enter	Why
A number of days: 60, 90, 95, 180, 365	That number	Day 1 is the day after the ride, as in the calculator
3 months	89	Three calendar months run 89 to 92 days
6 months	180	Six calendar months run 181 to 184 days, and 180 also covers a payer that counts 180 days
12 months or 1 year	365	A year that holds a Feb. 29 is 366 days. Medicare counts 12 months as 1 calendar year and makes a Feb. 29 service due Feb. 28 of the next year.
2 years	730	Two years run 730 or 731 days
6 months following the month of service	180, with the last day of the month of service as the date	The limit runs to the end of the sixth month after the ride’s month

South Dakota publishes its own table for the last rule: a ride in January must be received by the last day of July, a ride in February by the last day of August, and so on (General Claim Guidance, updated July 2026). Medi-Cal uses the same six months following the month of service. Its own example is a service on April 15, which must be received before October 31.

A worked example

The calculator opens with example dates. They show how the math works and are not a real claim.

Step	Math	Result
Date of service	The example ride	Sep 1, 2026
Payer’s time limit	12 months, entered as 365 days	365 days
Last day to file or correct the claim	Sep 1, 2026 + 365 days, with no Feb. 29 in between	Sep 1, 2027
Days left	Sep 1, 2027 minus the example today, Oct 1, 2026	335 days

Twelve months is the longest standard limit federal rules allow a state Medicaid program, so September 1, 2027 is the outside date for that ride unless an exception applies. Many payers want it much sooner. The same ride under WellTrans’s 60 days is due October 31, 2026, and under MTM Health’s standard 90 days, November 30, 2026.

Because today’s date fills in with your own date, the days left on your screen count from today, not from the example’s October 1.

Filing limits you can enter

Federal rule 42 CFR 447.45(d)(1) requires every state Medicaid agency to have providers submit all claims no later than 12 months from the date of service. States, health plans, and brokers may set less, and these published limits show how much less.

Payer	Limit as written	Enter
Any state Medicaid program (federal outer limit)	12 months from the date of service	365
New York Medicaid (18 NYCRR 540.6)	90 days	90
Texas Medical Transportation Program (September 2026 handbook)	95 days for in-state providers, 365 days for out-of-state providers	95 or 365
Indiana Medicaid, claims billed to the state (module version 8.5, February 24, 2026)	180 calendar days. Fee-for-service rides that Verida arranges are billed to Verida instead, under its agreement.	180
Illinois, non-institutional claims (as of September 2026)	180 days, for first and resubmitted claims	180
Arizona AHCCCS fee-for-service (Chapter 4, revised November 3, 2025)	6 months after the date of service	180
South Dakota Medicaid (updated July 2026)	6 months following the month of service	180 from the month’s last day
Medi-Cal (manual page updated February 2025)	Six months following the month of service	180 from the month’s last day
Ohio Medicaid (OAC 5160-1-19, effective February 1, 2023)	365 days	365
MTM Health, standard agreement (January 1, 2023 version Pennsylvania posts)	90 days, or another limit MTM’s client sets	90
MTM Health, Rhode Island (handbook updated July 1, 2026)	90 days	90
MTM Health, Virginia fee-for-service (handbook approved August 10, 2026)	6 months	180
WellTrans, Indiana (agreement revised October 16, 2025)	60 days. Invoices more than 90 days after the ride are disallowed in full.	60
Modivcare, Mississippi fee-for-service (manual of February 2024)	60 days. Later invoices lose 10 percent, and after 120 days they are disallowed.	60
MediTrans, Louisiana (as of September 2026)	365 days from the trip date	365

Health plans in the same state often set their own limits, so check each plan’s provider manual. The timely filing limit glossary entry covers the exceptions each program allows.

When a limit has two steps

WellTrans, Modivcare in Mississippi, and Medi-Cal each have a first deadline and a later one. Run the calculator once for each step. For the example ride on September 1, 2026:

Payer	First deadline	What happens after it	Final deadline
WellTrans, Indiana	60 days: Oct 31, 2026	The agreement makes invoicing within 60 days a condition of payment	After 90 days, Nov 30, 2026, invoices are disallowed in full
Modivcare, Mississippi	60 days: Oct 31, 2026	Payment drops by 10 percent	After 120 days, Dec 30, 2026, invoices are disallowed
Medi-Cal	Six months following September: received before Mar 31, 2027	Claims received April to June 2027 pay 75 percent, and July to September 2027 pay 50 percent	Claims received after September 2027 are denied

Treat the first deadline as the real one. The later date only limits the damage.

The other deadlines on a claim

Filing the first claim on time is only one clock. Fixing, resubmitting, and appealing a claim often have their own, and several start on the date of a notice rather than the ride. For these, enter the start date in the date of service box.

Payer	What you are doing	Start date	Limit
New York Medicaid	Correcting and resubmitting a claim with errors	The date of the notice	60 days
New York Medicaid	Submitting a claim delayed by circumstances outside your control	The day it came back within your control	30 days
Indiana Medicaid, claims billed to the state	Resubmitting a denied claim with corrections	The date of service	180 days, as a new first claim
Indiana Medicaid, claims billed to the state	Asking for administrative review of a denial	The date on the remittance advice	60 days
Arizona AHCCCS	Reaching clean claim status or adjusting a claim	The date of service	12 months
South Dakota Medicaid	Resubmitting after a denial	The denial	3 months
Medi-Cal	Claims Inquiry Form after a denial	The date of the remittance advice	6 months
MTM Health, Virginia	Appealing a denied claim	The denial	365 calendar days
MTM Health, Rhode Island	Appealing a denied claim	The denial	90 days in the portal section, 365 days in the claims section. Use 90.
Modivcare, Mississippi	Resubmitting a claim returned for missing information	The date it was returned	30 days for full pay, 60 days before it is denied

When Medicare must be billed first, the clock at MTM Health in Virginia, WellTrans, and Modivcare in Mississippi starts on the date Medicare denies the claim. Send a copy of the denial with your claim. The guide to corrected NEMT claims covers the codes for a replacement or a void, and how to appeal a denied claim covers the appeal itself.

How to use the answer

• Plan around your shortest limit. List every payer you drive for and its limit. If one broker allows 60 days, that is the pace for your whole billing routine.
• Pick a billing day and a cutoff. Bill every week. Then use the calculator with your shortest limit to find how many days you have to fix a rejection before any claim runs out.
• Put the last day on every open claim. Your accounts receivable list should show each claim’s date of service and its last filing day, sorted so the nearest one is on top.
• Log every denial with its own clock. A claim denial log holds the denial date, the reason, and the date the fix or appeal is due.
• Work claims closest to their last day first. When a claim has less than two weeks left, fix it before anything else. Check its status in the payer’s portal the same day. See how to check Medicaid claim status.
• Keep the payer’s proof. A timely filing denial can be overturned when you can prove the payer had your claim in time. Indiana accepts remittance advice, claim status responses, and portal screen prints, and rejects notes you wrote yourself. Save every response the day it arrives, and read each remittance advice the week it comes.

Unless an exception applies, a claim that misses its limit is lost for good. The routine above means the calculator is for checking, not rescuing.