ADR Response Deadlines Explained: How Many Days You Really Have and How to Request More Time

Introduction

"How many days do we have?" is usually the first question a provider asks after opening a Medicare Additional Documentation Request (ADR). The answer matters because Medicare rules allow contractors to deny a claim when requested documentation is not received on time. A late response can turn a valid claim into a denial or, in postpayment review, an overpayment.

The basic deadlines are well established, but they differ by contractor and type of review, and several related timeframes apply to signatures, late documentation, CERT requests, and appeals. Providers also frequently ask whether they can get more time. The answer is that extensions are limited, but contractors may accept late documentation for good cause, and CMS encourages providers to work with their contractor if they need more time.

This article explains the ADR deadlines for each contractor, how the days are counted, related timeframes that affect your response, what good cause means, how to request more time, what happens if you miss the deadline, and how to build a deadline management process. It is educational and does not replace professional advice. Always follow the deadline stated in your ADR letter.

The Core ADR Deadlines

CMS's Additional Documentation Request webpage and the Medicare Program Integrity Manual, Chapter 3, Section 3.2.3.2, set out the standard timeframes.

Prepayment Review

• MACs: 45 calendar days, as outlined in 42 CFR 405.903.

• UPICs: 30 calendar days, as outlined in 42 CFR 405.903.

Postpayment Review

• MACs, the Supplemental Medical Review Contractor (SMRC), and Recovery Audit Contractors (RACs): 45 calendar days, as outlined in 42 CFR 405.929.

• UPICs: 30 calendar days, as outlined in 42 CFR 405.929.

Comprehensive Error Rate Testing (CERT)

The CERT program uses a different approach. CMS states that if no documentation is received within 75 days of the initial CERT request, the claim is classified as a "no documentation" claim and counted as an error. Late CERT documentation may still be reviewed if received before the report cutoff and the provider has not appealed the CERT-initiated denial.

Targeted Probe and Educate

ADRs issued during Targeted Probe and Educate (TPE) are MAC requests and follow the MAC timeframe. Each TPE response affects the provider's error rate for that round.

Third-Party ADRs

CMS's manual explains that when a contractor requests documentation from a third party, such as an ordering physician, the billing provider must be asked for the same information first or at the same time. The third party has 45 days (30 days for UPIC requests) from the date of the most recent ADR to respond. If responses from either source fail to support the claim, the claim may be denied in full or in part.

How the Days Are Counted

Calendar Days, Not Business Days

The deadlines are stated in calendar days. Weekends and holidays count.

When the Clock Starts

Contractor guidance commonly explains that the response timeframe begins with the date of the ADR letter, not the date you received it. This makes prompt mail handling and portal monitoring essential, because time spent in transit or sitting in an inbox reduces the time available to respond.

When a Submission Counts as Received

For documentation submitted through the Electronic Submission of Medical Documentation (esMD) system, CMS's manual states that the esMD cloud receipt date controls. For other methods, contractors generally rely on their receipt date. Because mail can take several days, providers should send paper submissions well before the deadline and use a trackable method.

Where the Letter Is Sent

CMS explains that ADRs are sent to the practice address on file with Medicare and encourages providers to update their Medical Review Correspondence Address in PECOS to make sure ADRs reach them. An outdated address is one of the most common reasons providers miss deadlines.

Other Timeframes That Affect Your Response

Signature Logs and Attestations: 20 Days

If a reviewer finds a missing or illegible signature and determines that a signature log or attestation would be appropriate, CMS's manual directs the contractor to contact the provider. The provider has 20 calendar days to submit the log or attestation, counted from the date of phone contact or the date the provider receives the letter. If the submission resolves the issue, the contractor's review timeframe is extended by 15 calendar days from receipt. These 20-day and 15-day timeframes do not apply to CERT.

Late Documentation Reopening: About 15 Days

CMS's manual explains that if a claim is denied because documentation was not received, MACs may reopen the claim if the documentation arrives within a reasonable period, generally 15 calendar days after the denial date. The MAC must notify the provider within three business days and make a determination within 60 calendar days of receiving the documentation. RAC postpayment reviews handle late documentation differently depending on whether a demand letter has been issued.

Unsolicited Documentation (PWK)

When providers send documentation with a claim using the paperwork (PWK) process, CMS's manual instructs MACs to allow seven calendar days for unsolicited documentation to arrive (or ten days if mailed) before issuing an ADR.

Statistical Sampling Reviews

When a contractor conducts a statistical sampling review, CMS's manual generally provides 30 calendar days for the provider to submit or make records available, unless otherwise specified in the request.

Appeal Deadlines After a Denial

If a claim is denied, appeal deadlines begin:

• Redetermination by the MAC: generally within 120 days of receiving the initial determination.

• For postpayment overpayments: filing a redetermination within 30 days of the demand letter can limit recoupment under 42 CFR 405.379.

Can You Get More Time?

What the Rules Say

CMS's guidance provides that MACs, the SMRC, and RACs may accept documentation received after 45 calendar days for good cause, and that UPICs may accept documentation received after 30 calendar days for good cause. CMS describes good cause as situations such as natural disasters, interruptions in business practices, or other extenuating circumstances that the contractor deems good cause. CMS also states that it encourages providers and suppliers to work with their designated MAC if additional time is needed to respond to an ADR.

What This Means in Practice

• There is no automatic extension. Do not assume that asking for more time means you will get it.

• Contractors have discretion to accept late documentation for good cause.

• Some contractors publish their own procedures for requesting additional time, particularly for postpayment reviews. Check your contractor's website and the ADR letter for instructions.

• Historically, CMS has at times instructed reviewers not to grant extensions for prepayment reviews, so providers should be especially cautious with prepayment ADRs, where claims may be denied automatically when the deadline passes.

Examples of Situations That May Support Good Cause

• A natural disaster or emergency that closes your facility or disrupts operations.

• A significant system outage, such as an EHR failure or a cyberattack, that prevents access to records.

• Other extenuating circumstances, such as the sudden unavailability of records due to circumstances beyond your control.

Routine staffing shortages or simple oversight are less likely to be considered good cause.

How to Request More Time

If you believe you cannot meet the deadline, act early. A request made before the deadline is far more likely to be considered than an explanation after the claim is denied.

Step 1: Check the Letter and Contractor Guidance

Read the ADR letter's instructions and the contractor's website for any process for requesting additional time.

Step 2: Contact the Contractor Before the Deadline

Call or write to the contact listed on the ADR. Ask whether additional time can be granted and how to submit the request.

Step 3: Put the Request in Writing

Include:

• Provider name, NPI, and PTAN.

• Contractor name and ADR reference or document control number.

• Beneficiary name, Medicare number, claim number, and dates of service.

• The original due date.

• A clear explanation of the reason you need more time and how it qualifies as good cause.

• Supporting evidence, such as notice of a system outage or disaster declaration.

• The date by which you expect to submit.

Step 4: Keep Records

Save copies of the request, any confirmation, and notes from phone calls, including the date, time, and name of the person you spoke with.

Step 5: Submit What You Can

If part of the documentation is available, consider whether submitting it on time, with a note that additional documentation will follow, is appropriate under the contractor's instructions. Label each submission clearly, for example "Submission 1 of 2."

Step 6: Do Not Rely on Approval Until Confirmed

Continue working toward the original deadline until the contractor confirms that more time is allowed.

What Happens If You Miss the Deadline

Under 42 CFR 405.930 and CMS's manual, reviewers deny claims when the requested documentation is not received within the expected timeframe, including any extensions. CMS's manual directs MACs to deny non-response claims using group code CO, Claim Adjustment Reason Code 50, and Remittance Advice Remark Code M127.

Your Options

1. Late documentation reopening. If you send the documentation within a reasonable period after the denial, generally within 15 calendar days, the MAC may reopen the claim.

2. Appeal. If the reopening window has passed, submit the documentation with a redetermination request. For postpayment overpayments, file within 30 days of the demand letter to limit recoupment.

3. Fix the root cause. Determine why the deadline was missed and correct the problem.

Deadlines by Situation: Practical Scenarios

The following hypothetical scenarios show how the deadline rules apply in practice.

Scenario 1: The Letter Arrived Late

A MAC ADR is dated June 1, but the practice does not open it until June 12 because it was sent to an old address. The 45-day period is generally counted from the letter date, so the practice has about 34 days left, not 45. The practice should respond as quickly as possible and update its Medical Review Correspondence Address in PECOS to prevent a repeat.

Scenario 2: A UPIC Request

A home health agency receives a UPIC ADR. Because UPIC requests allow 30 calendar days, not 45, the agency sets an internal target of day 20. UPIC requests can also relate to broader investigations, so the agency involves its compliance officer and considers whether to consult legal counsel.

Scenario 3: A Cyberattack

A hospital's EHR system is disabled by a ransomware attack two weeks before an ADR due date. The hospital contacts the contractor immediately, explains the situation in writing, provides evidence of the outage, and requests additional time. This type of business interruption is the kind of extenuating circumstance that may support good cause, but acceptance is at the contractor's discretion.

Scenario 4: Missing Third-Party Records

A DME supplier needs the treating physician's notes to support a claim. The physician's office does not respond for three weeks. The supplier should have requested the notes on day one and followed up regularly. Delays by a third party generally do not extend the billing provider's deadline, so early requests and persistent follow-up are essential.

Scenario 5: A Signature Request After Submission

After a timely submission, the contractor calls to ask whether the provider wants to submit a signature attestation for an unsigned progress note. The provider has 20 calendar days from the call to submit the attestation from the author of the note. The provider calendars the deadline immediately.

Scenario 6: A Denial for Non-Response

A clinic misses an ADR deadline and the claim is denied. Five days later, it finds the records. Because the MAC may reopen if documentation arrives within a reasonable period, generally 15 calendar days after the denial, the clinic sends the records immediately with a request for reopening, rather than waiting to file an appeal.

Who Should Own ADR Deadlines?

Clear ownership prevents missed deadlines. Many organizations assign:

• An ADR coordinator to log requests, calculate due dates, and track submissions.

• A backup coordinator to cover absences.

• Department leads to gather records by internal target dates.

• A compliance officer to monitor timeliness and review missed deadlines.

Common Deadline Mistakes

• Counting from the date received instead of the date on the letter.

• Counting business days instead of calendar days.

• Mailing documentation close to the deadline without tracking.

• Assuming an extension request will be granted.

• Missing the 20-day signature log or attestation window.

• Not updating the Medical Review Correspondence Address in PECOS.

• Treating TPE ADRs as less urgent.

• Missing the 30-day window to limit recoupment after a postpayment denial.

• Confusing the CERT 75-day rule with the 45-day rule.

• Overlooking third-party documentation needs until it is too late.

Building a Deadline Management Process

Centralize Intake

Route all ADRs, from mail, portals, claims systems, and esMD, to a designated coordinator.

Use a Tracking Log

For each ADR, record the contractor, review type, letter date, received date, official due date, internal target date, and submission date.

Set Internal Targets

Set internal targets well ahead of the official deadline, for example day 30 for a 45-day request and day 20 for a 30-day UPIC request.

Automate Reminders

Use calendar or workflow tools to send reminders at set intervals.

Monitor Portals and esMD

Check MAC portals and electronic channels regularly. Consider registering for electronic medical documentation requests (eMDR) through esMD so ADRs arrive electronically.

Plan for Third-Party Records

Request records from ordering providers immediately and follow up weekly.

Prepare for Disruptions

Include ADR deadlines in your business continuity plan, so that a system outage or disaster does not cause missed deadlines. Document any disruptions in case you need to show good cause.

Report and Review

Report ADR timeliness to leadership and the compliance committee, and review any missed deadlines to identify root causes.

A Quick Reference of Medicare Documentation Timeframes

• MAC prepayment ADR: 45 calendar days.

• MAC, SMRC, and RAC postpayment ADR: 45 calendar days.

• UPIC prepayment and postpayment ADR: 30 calendar days.

• CERT request: no documentation within 75 days counts as an error.

• Third-party ADR: 45 days (30 for UPIC) from the most recent ADR.

• Signature log or attestation request: 20 calendar days (not CERT).

• Late documentation reopening by MAC: generally within 15 calendar days after denial.

• Unsolicited PWK documentation: 7 calendar days (10 if mailed) before an ADR is issued.

• Statistical sampling review records: generally 30 calendar days.

• Redetermination appeal: generally 120 days; 30 days from demand letter to limit recoupment.

A Sample Internal Timeline for a 45-Day ADR

• Day 1: Log the ADR, confirm the due date, and assign an owner.

• Days 2 to 5: Identify required documents and request third-party records.

• Days 5 to 20: Gather records and follow up on third-party requests.

• Days 20 to 25: Conduct the pre-submission review and address signature issues.

• Days 25 to 30: Assemble and submit the packet.

• Days 30 to 35: Confirm receipt.

• Days 35 to 45: Reserve as a buffer.

If problems arise that may prevent timely submission, contact the contractor immediately rather than waiting until the end of the period.

Frequently Asked Questions

How many days do I have to respond to a Medicare ADR?

Generally 45 calendar days for MAC, SMRC, and RAC requests and 30 calendar days for UPIC requests. CERT counts no documentation within 75 days as an error.

Does the deadline start when I receive the letter?

Contractor guidance commonly explains that the timeframe starts on the date of the ADR letter. Act quickly when a letter arrives.

Can I get an extension?

There is no automatic extension, but contractors may accept documentation received late for good cause, such as natural disasters or business interruptions. CMS encourages providers to work with their MAC if more time is needed.

What if I miss the deadline by a few days?

MACs may reopen a denied claim if documentation arrives within a reasonable period after the denial, generally 15 calendar days. Otherwise, submit the documentation with an appeal.

Does esMD help with deadlines?

esMD can speed delivery, and CMS's manual states that the esMD cloud receipt date controls for timeliness.

Do weekends and holidays count?

Yes. ADR deadlines are stated in calendar days, so weekends and holidays are included.

Conclusion

Medicare ADR deadlines are short and strictly applied: 45 calendar days for most MAC, SMRC, and RAC requests, 30 days for UPICs, and 75 days before CERT counts a no documentation error. Additional timeframes apply to signature logs and attestations, late documentation, and appeals. Extensions are not automatic, but contractors may accept late documentation for good cause, and CMS encourages providers to work with their MAC when they need more time. Providers that count days correctly, keep their correspondence address current, track every request, set internal targets, ask for more time early and in writing when justified, and know their options after a missed deadline can avoid most deadline-related denials.

How HealthBridge Can Help

HealthBridge is a healthcare management consulting firm that helps providers set up ADR intake and tracking systems, manage deadlines across contractors, prepare complete and timely responses, request additional time when appropriate, and pursue reopenings and appeals after denials. If you need help meeting ADR deadlines or recovering from a missed one, please get in touch with us. We will be happy to help you with this topic.

References

• Centers for Medicare & Medicaid Services. Additional Documentation Request. https://www.cms.gov/data-research/monitoring-programs/medicare-fee-service-compliance-programs/medical-review-education/additional-documentation-request

• Centers for Medicare & Medicaid Services. Medicare Program Integrity Manual, Chapter 3, Verifying Potential Errors and Taking Corrective Actions. https://www.cms.gov/regulations-and-guidance/guidance/manuals/downloads/pim83c03.pdf

• Centers for Medicare & Medicaid Services. Medicare Program Integrity Manual, Chapter 8, Administrative Actions and Statistical Sampling for Overpayment Estimates. https://www.cms.gov/regulations-and-guidance/guidance/manuals/downloads/pim83c08.pdf

• Centers for Medicare & Medicaid Services. Medicare Program Integrity Manual, Chapter 12, Comprehensive Error Rate Testing. https://www.cms.gov/regulations-and-guidance/guidance/manuals/downloads/pim83c12.pdf

• Centers for Medicare & Medicaid Services. Improper Payment Measurement in the Medicare Fee-for-Service Program (January 2025). https://www.cms.gov/files/document/introduction-comprehensive-error-rate-testing-cert-program.pdf-0

• Centers for Medicare & Medicaid Services. Complying with Medicare Signature Requirements (MLN905364, July 2025). https://www.cms.gov/mln905364-complying-with-medicare-signature-requirements

• Centers for Medicare & Medicaid Services. Provider Enrollment, Chain, and Ownership System (PECOS). https://www.cms.gov/medicare/enrollment-renewal/providers-suppliers/chain-ownership-system-pecos

• Centers for Medicare & Medicaid Services. CMS Manual System, Pub. 100-08, Transmittal 567 (New Timeframe for Response to Additional Documentation Requests). https://www.cms.gov/Regulations-and-Guidance/Guidance/Transmittals/Downloads/R567PI.pdf

• Electronic Code of Federal Regulations. 42 CFR 405.903, Medicare Integrity Program Requirements (Prepayment Review). https://www.ecfr.gov/current/title-42/chapter-IV/subchapter-B/part-405/subpart-I/section-405.903

• Electronic Code of Federal Regulations. 42 CFR 405.929, Post-Payment Review. https://www.ecfr.gov/current/title-42/chapter-IV/subchapter-B/part-405/subpart-I/subject-group-ECFRba80b2c5e3f1227/section-405.929

• Electronic Code of Federal Regulations. 42 CFR 405.930, Failure to Respond to Additional Documentation Requests. https://www.ecfr.gov/current/title-42/chapter-IV/subchapter-B/part-405/subpart-I/subject-group-ECFRba80b2c5e3f1227/section-405.930

• Electronic Code of Federal Regulations. 42 CFR 405.379, Limitation on Recoupment of Provider and Supplier Overpayments. https://www.ecfr.gov/current/title-42/section-405.379

• Centers for Medicare & Medicaid Services. Original Medicare (Fee-for-Service) Appeals. https://www.cms.gov/medicare/appeals-grievances/fee-for-service