Two reasons Revenue Cycle Management (RCM) is worth knowing:

It's Tuesday morning. Biscuit the corgi (from here) is back at Dr. Singh's clinic, three weeks after his ER trip for that twisted ankle. The ankle feels fine. Today's visit is a follow-up to make sure it healed clean.

Biscuit walks through the door at 9:10 AM and heads straight for the front desk, where Sage is already expecting him.

Sage is a border collie, navy sweater, white collar, the kind of front-office person who runs everything and never seems rushed. She's been at Dr. Singh's clinic for six years. She knows Biscuit by name. She also knows his insurance is active for today's visit, because she ran the eligibility check before the lobby opened this morning. Biscuit doesn't know that. Most patients don't.

In about fifteen minutes, Biscuit will walk into Dr. Singh's exam room. Dr. Singh will check the ankle, declare it fully healed, write up the visit notes, and send him home. Biscuit will think he's done with healthcare for the day.

He's not. He's only done with the part of healthcare patients see.

After he leaves, four different people will keep working on his visit. Sage will pull his chart back up to assign the right billing codes. She'll submit the claim electronically to BHC, Biscuit's insurance company, where a payer rep will review it against his plan and decide what BHC pays and what Biscuit owes. Three to six weeks from now, an envelope will land in Biscuit's mailbox.

That entire chain (front desk to mailbox) is what we call Revenue Cycle Management. And it has four main characters.

Four people. Three different organizations: the clinic, the patient, the insurance company. One bill at the end. Now let's walk Biscuit through the whole thing, step by step.

The revenue cycle has three phases: before the visit, the visit and the claim, and after the claim. Within each phase, here's what happens.

Different industry sources count this as anywhere from seven to thirteen steps depending on how they group them. The exact count doesn't matter. What matters is the flow, and where things break.

When Biscuit called to book his follow-up appointment, the receptionist who picked up the phone was already starting step 1 of the chain. She updated his record, confirmed his phone number, asked for the insurance card on file, and noted that the visit was a follow-up for the ankle. None of that felt like billing. All of it was.

When you call to book or fill out forms in the patient portal, the clinic is collecting (or confirming) a specific set of data points that will follow your visit through the rest of the chain:

Every one of these fields ends up on the claim that gets sent to your insurer later. A transposed digit in your insurance member ID, or a name that doesn't exactly match what your insurer has on file, can cause a claim to bounce weeks later for reasons that look unrelated.

This is why clinics ask you to confirm your information at every visit, even if you've been a patient for years. They're trying to catch errors before they cascade downstream.

Sage runs the front office at Dr. Singh's clinic. Before the lobby opens, she runs eligibility verification for every patient on the day's schedule.

Eligibility verification is a check the clinic does before the visit, to make sure the patient's insurance will actually pay for the appointment. If it won't, the patient and the clinic need to know before any care is delivered, not after.

Sage runs this check through a verification system, managed by an eligibility vendor, that queries the insurer's database in real time. The system returns a yes, a no, or "this looks off, take a closer look."

Today, Biscuit has a 9:15 AM follow-up for his ankle. His eligibility check comes back clean.

The patient after Biscuit gets a yellow flag. Her employer switched insurance carriers three weeks ago and the clinic still has the old plan on file. Sage notes it and flags the front desk to ask for the new card at check-in. Without that catch, the claim would have been submitted to the wrong insurer, denied two months from now, and the patient would have received a surprise bill for a visit she thought was covered.

Per the Experian Health State of Claims 2025 survey, eligibility errors at registration are the single largest source of preventable denials, accounting for about a quarter of all claim denials. Coverage had changed, or the data didn't match what the insurer had on file, or a small detail was off. This is the easiest type of error to prevent and the most common to miss.

Biscuit walks in at 9:15 AM. Dr. Singh examines his ankle, asks how it's been feeling, checks his range of motion, declares it fully healed, and sends him home. Total time in the exam room: maybe fifteen minutes. For most patients, this is the only part they think of as "healthcare." The rest of the chain is invisible to them.

For certain services, your insurer requires the doctor to get approval in advance before the service can be billed. This is called prior authorization.

Here's the part most patients miss. Prior auth isn't a mandatory step for every visit. It only activates when, during a visit, the doctor recommends a service the insurer has flagged as requiring approval. Prior auth typically applies to higher-cost or higher-scrutiny categories: planned surgery, advanced imaging (MRI, CT, PET scans), specialty medications, genetic testing, durable medical equipment, etc.

So the sequence works like this. The patient sees the doctor. The doctor examines them and recommends, say, an MRI. At that point, the clinic identifies whether the MRI needs prior auth on the patient's plan. If it does, the prior auth process kicks off after the visit, before the MRI can be scheduled. The visit itself didn't need prior auth. The MRI the doctor recommended does.

Biscuit's follow-up didn't trigger any new services, so no prior auth was needed for him. But the data on prior auth is worth pausing on.

Per the AMAs 2025 Prior Authorization Physician Survey, 95% of physicians report that prior authorization delays patient care, and 79% report that patients sometimes abandon recommended treatment because of authorization difficulties. That makes it a leading cause of delayed care in American healthcare. We'll spend a full issue on it later, because the mechanics matter and so do the protections.

After the visit, two things happen in quick succession.

(Remember these terms from Medical Billing 101?)

Both codes have to be on the claim. The CPT tells the insurer what they're paying for. The ICD-10 tells them why it was necessary. If the two don't match (e.g., a CPT code for surgery without a diagnosis that justifies surgery), the insurer can't process the claim and sends it back.

The coded claim is sent electronically to Biscuit's insurer through the clearinghouse. The clearinghouse runs its formatting checks, and if everything looks right, forwards the claim to BHC. This usually takes a day or two from the visit.

This is where your insurance company runs the math on your claim. Their system checks whether the service was covered, applies your deductible and coinsurance (the plan terms covered in Health Insurance 101), and calculates what they'll pay the clinic vs. what you'll owe.

For a clean claim, adjudication takes about one to four weeks. For a claim that gets pulled for additional review, it can take (much, much) longer.

The insurer then sends the clinic a payment and sends you an Explanation of Benefits (EOB) showing the math. (Remember the EOB from Medical Billing 101? It's the document that says "THIS IS NOT A BILL" at the top, the one most people throw away.)

The clinic records the insurer's payment in the patient's account and checks it against what was billed. If the payment was less than expected, or the claim was denied, this is where the clinic's billing team starts the follow-up: a phone call to the insurer, a corrected resubmission, or an appeal.

This step is invisible to patients but it's where a lot of revenue work happens behind the scenes.

Once the insurer has paid their share, the clinic sends you a bill for the remaining balance you owe. That's the envelope in your mailbox, three to six weeks after the visit.

If you've ever wondered why a bill arrives so long after a visit, that's why. Every step had to happen first.

Most billing problems aren't bad intent. They're upstream data errors that nobody caught at the time. And the cost of catching them changes dramatically depending on when in the chain they're found.

A small mismatch caught at the eligibility step before the claim goes out costs roughly the price of a sandwich to fix. The same mismatch caught after the bill is in your mailbox costs four to eighteen times more, plus the patient's time on the phone.

That's why understanding RCM is useful. Most billing problems are easier to prevent than to fix. The earlier in the chain you catch them, the less they cost everyone.

Three things you can do before any visit, in order of how much they help.

1. For scheduled procedures: get the CPT code before you go

If your visit is for a planned procedure, test, or imaging (MRI, CT, X-ray, lab test, surgery, colonoscopy, infusion, physical therapy), the clinic already has the CPT code in their scheduling system. Ask for it.

Then call your insurance, give them the code, and ask three things:

Write down the answers and the reference number for the call. If the bill doesn't match what they quoted, that reference number is your evidence.

Fifteen-minute phone call. No surprises later.

(This doesn't work for routine office visits. The CPT code for a regular checkup is determined after the doctor sees you, based on what actually happened.)

2. If you're uninsured or self-pay: ask for a Good Faith Estimate

Under the No Surprises Act (in effect since January 2022), uninsured and self-pay patients have a federal right to a written estimate before any scheduled service.

Ask the scheduling office: "I'd like a Good Faith Estimate for this." They're required to provide it at least three business days before the service. If the final bill exceeds the estimate by more than $400, you can file a formal dispute within 120 days.

(For insured patients, HHS has delayed enforcement of the parallel process.)

That's it for this issue. Hit reply. I read everything.

— Shivang