Audits & Appeals

Insurance Audits for Dietitians: Triggers & the First Letter

What triggers a payer audit of an RD's claims, and what the first letter means: records request, ADR, overpayment letter, recoupment. Plain-language guide.

By Javier Alvarez · Published July 12, 2026 · Updated September 29, 2026 · 7 min read

The audit letter doesn't announce itself as a crisis. It's a bland envelope (or portal message) asking you to send records for ten or twenty dates of service. But for a solo RD, it lands like one: the payer is questioning money you already earned — and in some cases already spent — and the burden of proof is entirely on your documentation.

Here's the reframe that makes audits survivable: an audit is not an accusation. It's a records check. If your notes support your claims, you send the notes, and the review closes. The RDs who get hurt in audits aren't usually committing fraud — they're billing correctly and documenting loosely, which to an auditor looks like the same thing.

This page answers two narrow questions: what gets a dietitian audited, and what the first letter actually means. For the complete system — the per-note checklist, the five failure modes that cause clawbacks, and how to work a records request from start to finish — read the full playbook, How to Audit-Proof Your Nutrition Claims.

The words on the letter, in plain language

Audit letters use vocabulary nobody teaches in a dietetics program. Here's what each term means for you:

And the most common phrasing we hear from RDs: "the insurance wants money back." That is almost always either an overpayment letter (they're asking) or a recoupment (they're already taking it from new payments). Both are contestable; neither is the end of the story. If you haven't received an overpayment letter and are just seeing lower deposits, look at your ERA/EOB for offset or adjustment lines that reference an older claim.

Pre-payment vs. post-payment

Pre-payment reviews sting because they freeze your cash flow. Post-payment audits sting harder because some payers extrapolate: if they review a sample, find unsupported claims, and you billed many similar claims in the lookback period, they may project that error rate across all of them.

What actually triggers audits for RDs

Payers don't read your notes looking for trouble. Their software reads your claims data looking for statistical outliers. The patterns that flag dietitians:

• Always four units. If every 97803 you bill is exactly 4 units, you look like a provider who bills the maximum by default rather than by the clock. Real caseloads have 30-minute follow-ups and 45-minute follow-ups. A natural distribution of 2s and 3s is what honest billing looks like in the data.
• Units that can't match time. Eight 4-unit sessions billed on the same calendar day implies an 8-hour day of pure face-to-face MNT with no gaps. Payers do this math.
• High 97802 frequency. 97802 is the initial assessment — once per patient per provider (or per episode, depending on the payer). A provider billing 97802 repeatedly for the same patient, or at an unusually high ratio to 97803, gets flagged fast.
• Visit frequency outliers. Weekly visits for months, for every patient, at a rate far above peer dietitians in your region.
• Telehealth anomalies. POS 10 or 02 with missing or mismatched modifiers, or telehealth claims that conflict with the payer's coverage policy. See our guide to telehealth billing for dietitians for the modifier and place-of-service rules.
• Diagnosis patterns. The same diagnosis code on every claim, or a code the payer's nutrition policy doesn't list as covered, invites a look at whether the note supports it.
• Patient complaints and referrals. A confused patient who calls the payer about a bill can trigger a manual look at your claims.

Some reviews are also simply random — Medicare runs national programs that sample claims across all provider types, and its Recovery Audit Program reviews paid claims after the fact. You can't control that — you can only control whether your records survive it.

What the first letter is really asking

Whatever it's called, the first letter is almost always a records request, and the reviewer who reads your records is answering four questions:

1. Does the documented time support the units billed? Under the CMS midpoint logic, 4 units of 97803 requires 53–67 minutes of documented MNT. If your note says "60-minute follow-up" or lists start/stop times, you're covered. If it says nothing about time, the units are unsupported — and typically downcoded or denied entirely.
2. Does the note demonstrate medical necessity? The note has to show why this patient needed MNT on this date. Our guide to charting for medical necessity breaks down what reviewers want to see.
3. Are the diagnosis codes consistent? The ICD-10 on the claim should match the note and the physician referral. A claim billed under E11.9 with a note that never mentions diabetes is a problem.
4. Is the note signed and dated? Unsigned notes, notes created long after the date of service, and template text with no patient-specific content are treated as inadequate documentation.

If you want to see what a note that answers all four looks like, start with how to write an MNT note that gets paid.

The first 48 hours after the letter

You don't need to solve the audit in two days. You need to not lose it by default:

1. Calendar the deadline the day it arrives. For Medicare, the Program Integrity Manual gives providers 45 calendar days to answer a MAC, RAC, SMRC or CERT documentation request (30 for a UPIC), and claims are denied if the documentation doesn't arrive in time. Commercial deadlines are set in the letter itself.
2. Identify the letter type using the table above: records request, overpayment letter, or a recoupment already showing on your remittance.
3. List the claims under review and pull the note, referral, and claim for each.
4. Don't edit anything. A late entry or addendum must be labeled and dated as such; changing the original note is how a documentation problem becomes a fraud problem.

Then work the full process — organizing the packet, the cover letter, appeals, challenging extrapolation — with the step-by-step in the audit-proof playbook and our guide to what to do when a payer requests your chart notes.

If they demand money back

A post-payment audit that finds unsupported claims ends in an overpayment or recoupment demand — repay directly, or the payer offsets the amount against your future remittances. You have options: appeal with the evidence (the process resembles appealing a denied nutrition claim, just with more at stake), challenge extrapolation if the payer projected an error rate across unreviewed claims, or negotiate a repayment plan if the finding stands. For large amounts, a few hours with a healthcare attorney or billing consultant is cheap insurance. Your contract defines the payer's lookback window and your appeal rights, and state law may limit both.

Audit-proofing is just documentation hygiene

Everything that survives an audit is something worth doing anyway:

• Time in every note — total minutes or start/stop, matching the units billed.
• Units that follow the clock, not a default. If the visit ran 38 minutes, bill 3.
• A structured note — ADIME or SOAP — that ties diagnosis, assessment, intervention, and plan together. Our SOAP note templates for dietitians are built to capture exactly the elements reviewers check.
• Diagnosis consistency across referral, note, and claim.
• Same-day signatures. A note signed weeks late invites the question of when it was really written.

Do this on every visit and an audit becomes a photocopying exercise instead of a financial event.

How Farela helps: Farela's AI charting documents your sessions — time included — as you deliver them, then generates codes and units that match the note, so your claims and your documentation never drift apart. That consistency is the whole audit defense, built in. Create your free account. The EHR is free; billing is 3.9% of what an insurer pays, plus your own Claim.MD plan.

Part of Denials, ERAs & appeals.