The Aetna update, decoding pushback, and your 3-step claim rescue plan

Hi Reader,

Let’s address the elephant in the room right off the bat: the abrupt Aetna denials.

We know many of you have been blindsided by Aetna suddenly denying Medical Nutrition Therapy (MNT) coverage for patients with a BMI under 30. Dropping a policy change like this with zero warning has left practices scrambling, revenue paused, and patients without the care they were relying on.

Please know you aren't fighting this alone. The Academy of Nutrition and Dietetics is actively addressing this issue directly with Aetna leadership to advocate for our profession. We will keep you updated as soon as we hear more on their progress.

While the Academy fights that battle on the policy front, let’s focus on the billing battles you have the power to win right now in your own practice.

As promised last month, we are dedicating this issue to the most common reasons your claims bounce back—and a simple, 3-step plan to clean up your billing routine.

Step 1: Decoding the Pushback (Rejection vs. Denial)

Not all returned claims are created equal. Knowing exactly where a claim was stopped dictates how you fix it.

• A Rejected Claim: This never even made it to the payer. It was kicked back by the clearinghouse due to a formatting error, missing data, or an invalid code. The Fix: Because it was never officially processed by the insurance company, you simply correct the missing or invalid information and submit it as a brand-new claim.
• A Denied Claim: This was received and processed by the payer, but they refused to pay it based on their coverage rules (like the recent Aetna BMI policy), lack of medical necessity, or a billing error. The Fix: You cannot just submit a new claim. You must submit a "Corrected Claim" or a formal appeal, directly referencing the original claim number.

Step 2: Spotting the Traps

The easiest way to handle bounced claims is to stop them before you hit submit. Here are the most common traps on a CMS 1500 form that trigger instant kicks:

• Mismatched Demographics: The patient’s name, DOB, or ID number doesn’t perfectly match what the insurer has on file (e.g., using "Bill" instead of "William").
• Invalid Diagnosis Codes: Using outdated or truncated ICD-10 codes, or failing to point the correct diagnosis code to the corresponding CPT code (like 97802 or 97803).
• Missing Provider Info: Forgetting the referring provider’s NPI (if a referral is required) or leaving your own rendering NPI out of the correct box.
• Place of Service (POS) Errors: Using the in-office POS code (11) when the session was actually telehealth (02 or 10).

Step 3: The Resubmission Rescue

When a claim comes back unpaid, don't write it off. Here is exactly what to do so you can still recover your money:

1. Read the Codes: Look at the Electronic Remittance Advice (ERA) or Explanation of Benefits (EOB). Find the specific Claim Adjustment Reason Code (CARC) to see the exact reason the payer denied it.
2. Make the Fix: Update your EHR or CMS 1500 form with the accurate information.
3. Bill as Corrected: If it was a denial, change the Resubmission Code in Box 22 to a "7" (Replacement of prior claim) and include the Original Reference Number provided by the payer.
4. Beat the Clock: Pay close attention to the payer's timely filing limits for corrected claims—they are often much shorter than initial submission windows.

Stop Guessing, Start Growing

If you keep guessing your way through claim submissions, you risk leaving thousands of dollars on the table. But when you learn the rules of the game, you build a sustainable practice where direct deposits just happen on repeat.

Take a few minutes this week to audit your most recent batch of unpaid claims using this 3-step method. The money is there—you just have to know how to ask for it.

See you next month... 🔮

Laura Poland, RDN

The Insurance-Ready Dietitian

October Blog & Video

Resource of the Month:

📋 The Dietitian’s Insurance Cheat Sheet - check out an example below:

Still haven’t grabbed the Cheat Sheet?

Learn more about becoming an Insurance-Ready Dietitian at my website.

See You Next Month...🔮

Coming Up in November:

Did you know Medicare MNT for diabetes requires your referrals to come strictly from an MD or DO? In honor of National Diabetes Awareness Month this November, we’re unpacking exactly how dietitians need to handle these specific claims—from CMS-1500 referring provider rules to keeping your documentation audit-proof. Watch your inbox next month so you don't leave any earned revenue on the table!