Medicare TPE Audit: The 45-Day Response Window

A Medicare Targeted Probe and Educate (TPE) letter from your Medicare Administrative Contractor (MAC) carries a 45-calendar-day Additional Documentation Request (ADR) response window per claim. The MAC selected your practice based on statistical outlier billing patterns. In the first 14 days, triage the claim list, pull records under counsel direction, and start a tab-by-tab response keyed to each claim's medical-necessity citation.

What a TPE letter actually is

Targeted Probe and Educate is the Medicare medical-review program managed by the MACs under direction from the Centers for Medicare & Medicaid Services (CMS). The program structure is described in the Medicare Program Integrity Manual, Chapter 3 and the TPE process overview.

TPE is pre-payment in most cases — claims under review are paused or held while documentation is evaluated. The structure is three rounds:

• Round 1 — MAC requests 20 to 40 claims, reviews documentation against medical-necessity and coding rules, scores the error rate, and offers one-on-one education on identified deficiencies.
• Round 2 — If Round 1 error rate exceeds the MAC threshold, a fresh sample is pulled after a 45-day cooling-off period. Same structure.
• Round 3 — Same process. If the error rate fails across three rounds, the case is referred to CMS for further action under 42 CFR § 424.535.

Each round is independent. Passing Round 1 closes the matter on that service. Failing all three triggers escalation: UPIC referral, 100% pre-payment review, or revocation of Medicare billing privileges.

The first 14 days

In the audit work d3rx has supported, the practices that pass TPE Round 1 cleanly are the ones who treat the first 14 days as the most consequential — not the last 14. Use that time to triage and pull records, not to draft narrative.

1. Log the ADR letter against the deadline. Each claim has its own 45-day clock running from the date on the ADR letter. Calendar every deadline.
2. Assign an internal owner. Single named person, not a committee. Owner reports to the practice's compliance officer and works with billing and clinical leads.
3. Identify counsel. TPE response is operational, but a high-volume probe or one paired with prior CMS contact warrants counsel from day one — particularly if the claim selection suggests a pattern.
4. Pull the claim list and reconcile to the chart. Every claim in the ADR list maps to a date of service, a CPT code, a provider, and a diagnosis. Pull the chart for each one before drafting any response.
5. Read the MAC's coverage policy. Every TPE probe targets a specific service, and the MAC's Local Coverage Determination (LCD) — or the National Coverage Determination (NCD) where one exists — is the rule the records will be measured against. Read it before you write a word.
6. Identify the probe's likely error category — medical necessity, signature, time documentation, modifier use, units billed, or absent provider documentation. The MAC letter usually hints at the category in its rationale.

What the MAC is checking

TPE document review follows the Medicare Program Integrity Manual, Chapter 3, Section 3.3. The reviewer maps every claim to:

• Coverage — does the service meet the LCD or NCD criteria for the diagnosis billed
• Medical necessity — does the documentation in the chart support the service as reasonable and necessary under Social Security Act § 1862(a)(1)(A)
• Documentation — provider signature and credentials per Medicare Program Integrity Manual Chapter 3, Section 3.3.2.4, date of service, time entries where required (e.g., time-based E/M, anesthesia, infusion)
• Coding — CPT/HCPCS selection, modifier use, units billed, place of service
• Order — physician order on file for diagnostic services per 42 CFR § 410.32
• Beneficiary eligibility — Medicare coverage on the date of service

A claim missing any one of these elements can be denied on a single ground, regardless of the underlying clinical care quality.

Building the per-claim response

The response is per-claim, not aggregate. Each claim gets its own tab in the response package:

• ADR letter for the claim
• Chart documentation supporting the date of service
• The signed and dated provider order if applicable
• The signed and dated physician documentation for the encounter
• Time entries where the code is time-based
• Any cross-reference documentation (lab results, imaging, prior auth, ABN)
• A one-paragraph cover note tying the documentation to the specific LCD or NCD coverage criteria
• The HCPCS/CPT crosswalk if a coding decision is in question

Common drafting errors that turn a defensible claim into a denial:

• The narrative cover note contradicts the chart (do not narrate; let the chart speak)
• Missing co-signature on a resident or scribe note
• Provider signature on the encounter is illegible or missing credentials
• Time entries are inconsistent with the billed code's required threshold
• The medical-necessity rationale is implied but not documented in the chart

What not to do

• Do not back-date or amend records to fill a gap. Late entries are permitted if clearly labeled with date of entry and identity of the entrant per CMS signature guidance; fabrication is a False Claims Act exposure.
• Do not submit an aggregate narrative response. TPE reviewers score claim-by-claim.
• Do not over-respond. Documents not requested widen the audit surface.
• Do not delay refund of any overpayment identified during review. The 60-day refund clock at 42 USC § 1320a-7k(d) runs from identification.
• Do not skip the MAC's offered education session after Round 1. Declining the education is itself a flag and removes the practice's ability to claim it was uninformed in any later escalation.

The Round 1 education session

If Round 1 identifies an error rate above the MAC threshold (typically 15 to 30% depending on MAC and service), the MAC offers a one-on-one education session before Round 2 begins. Treat it as substantive, not a courtesy:

• Identify the lead provider and billing manager who will attend
• Read the MAC's summary of identified errors before the session
• Document the session date, attendees, topics covered, and identified corrective actions
• Implement the corrective actions before Round 2's 45-day cooling-off period ends
• Re-train staff on the specific deficiencies identified

The education record itself becomes part of the practice's compliance documentation and is a material asset if the matter ever escalates.

After Round 3: escalation pathways

Failure across three TPE rounds, or a sufficiently severe Round 1 finding, can route the matter to:

• Unified Program Integrity Contractor (UPIC) — broader fraud investigation under Medicare Program Integrity Manual Chapter 4
• 100% pre-payment review — every claim of the probed type is reviewed before payment, often for 12 months or longer
• Recovery Audit Contractor (RAC) referral — post-payment recovery on a wider claim set
• Medicare enrollment revocation under 42 CFR § 424.535, including the resulting one- to ten-year reapplication bar
• OIG referral — false claims, exclusion under 42 CFR § 1001.901, or criminal investigation in the most serious cases

Escalation is the reason to treat TPE Round 1 as the response that matters most, not the one to deprioritize.

State-law overlay

Federal Medicare rules above. State law may add layered obligations on the same underlying records:

• California: practices participating in Medi-Cal face parallel state program-integrity review with its own document-request structure.
• Texas: HHS-OIG (state) operates Medicaid program-integrity audits that can overlap with federal TPE-style review.
• New York: the Office of the Medicaid Inspector General (OMIG) runs an independent audit program.
• Massachusetts: MassHealth program-integrity audits overlap with Medicare reviews on dual-eligible patients.

If your practice bills any state Medicaid program, expect the underlying chart documentation to be requested by multiple reviewers in parallel.

Restraint about claims

No vendor or guide can promise a TPE outcome. The MAC's decision rests on the documentation in the chart at the time of service. The practice's job is to produce that documentation completely, on schedule, and against the right coverage policy. A well-organized, source-grounded response package materially outperforms a scrambled one.

How d3rx fits

The d3rx compliance binder holds the underlying program documentation a TPE response is built from — billing-compliance policies, provider signature standards, internal coding-review evidence, and the LCD/NCD tracker. The d3rx audit defense workflow walks the ADR triage steps, the per-claim tabbing structure, and the Round 1 education-session documentation. d3rx does not represent the practice in any MAC proceeding and does not replace counsel; it is a point-in-time administrative documentation aid that the practice and counsel work from.