Annual Physical vs. Wellness Visit: How Billing Codes Change What You Pay

You scheduled your "free yearly checkup," saw a $0 copay listed in the portal, and then a bill arrived anyway. What happened? The short answer is that "annual physical" and "wellness visit" aren't interchangeable terms — your insurer codes them differently, covers them differently, and charges you differently.

Why the Two Terms Mean Different Things to Your Insurer

The confusion is baked into the system, not a quirk of your specific plan. When a provider submits a claim, they attach billing codes that tell your insurer what type of service was performed. Preventive wellness visits use a specific set of CPT codes (99381–99397 for new and established patients by age group) paired with Z-code diagnoses, which flag the visit as screening-based rather than problem-based.

Under the Affordable Care Act, most non-grandfathered plans are required to cover preventive wellness visits at 100%, no copay, no deductible, when those visits are billed with the correct preventive codes. That zero-dollar coverage is tied to the billing codes, not to the name you used when you made the appointment.

A traditional annual physical that includes problem-focused work (reviewing a blood pressure medication, following up on a chronic condition, evaluating a new symptom) can pull in different billing codes even if everything happened in the same hour. Your visit gets coded partly as preventive (covered at 100%) and partly as a diagnostic office visit (subject to your normal cost-sharing). Neither your doctor's front desk nor your insurer is necessarily doing anything wrong. The distinction is structural.

What a Preventive Wellness Visit Actually Covers

A preventive wellness visit, as defined under the ACA, focuses on health maintenance and risk screening rather than treating existing conditions. Covered services for adults include blood pressure screening, BMI measurement, depression screening, and age-appropriate cancer screenings — all without cost-sharing on qualifying plans. Immunizations recommended by the Advisory Committee on Immunization Practices (ACIP) and counseling for certain chronic-disease risk factors also fall under that no-cost-sharing umbrella.

What preventive coverage doesn't automatically include is treatment for a condition you already have, evaluation of a new problem, or management of anything you'd normally address at a sick visit. If your provider brings up a knee injury, reviews your diabetes labs, or changes a prescription while they're in the room with you, that portion of the visit is clinically distinct from the preventive screening.

That's where the split bill comes from. One encounter, two billing events: one preventive, one diagnostic. The preventive portion stays at $0. The diagnostic portion flows through your regular benefits, meaning your deductible (the amount you pay out of pocket before insurance starts contributing) and your copay or coinsurance (your share of the cost after the deductible) both apply.

When a Physical Becomes a Billable Office Visit

CMS guidelines allow providers to bill both a preventive visit code and a separate evaluation-and-management (E/M) code in the same encounter when a significant, separately identifiable problem is addressed. The provider appends a modifier (-25) to the E/M code to signal that the problem-focused work was distinct from the preventive visit, not redundant with it. This is legitimate billing practice, not a workaround. If your provider spent 10 minutes on preventive screenings and another 15 discussing a chronic condition, those were two different clinical activities, and the coding reflects that.

What this means for your wallet depends on your specific plan:

High-deductible health plan (HDHP): If you haven't met your deductible yet, you'll likely owe the full negotiated rate for the E/M portion.
Copay-based plan: You may owe a flat copay for the office visit portion, regardless of what the preventive component cost.
Out-of-pocket maximum: Once you've hit your plan's annual cap, cost-sharing stops, so the timing of your physical within the plan year matters.

The only way to know exactly what you'll owe is to ask your insurer before the appointment, not after.

Medicare Annual Wellness Visits Are a Different Program Entirely

If you're on Medicare, the rules shift significantly. Medicare Part B covers an Annual Wellness Visit (AWV) once every 12 months after the first year of Part B enrollment. The AWV is covered at no cost to you, but it is not a traditional head-to-toe physical exam.

The AWV is structured around a personalized prevention plan: a health-risk assessment, a review of your medical and family history, cognitive screening, and updates to a list of current providers and medications. It is designed for prevention planning, not for examining and treating the body. A provider who performs a physical exam during the AWV may bill for it separately, and Medicare generally won't cover that portion.

Medicare also offers a one-time "Welcome to Medicare" preventive visit during your first 12 months of Part B coverage, separate from the AWV.

If you want a traditional physical exam and you're on Medicare, ask your provider ahead of time whether it's covered under your specific plan or whether you may receive a separate bill. Some Medicare Advantage plans (Part C) do cover routine physicals, but benefit structures vary by plan. Calling your plan directly is the clearest path to an answer.

How to Avoid a Surprise Bill at Your Next Checkup

A few steps before and during the appointment go a long way.

Before you go:

Call your insurer's member services line and ask which CPT codes are covered at 100% under your preventive benefits. You don't need to memorize the codes, just ask them to confirm that a "preventive wellness visit" with your age and sex will be covered with no cost-sharing at this provider.
Confirm the provider is in-network. An out-of-network provider can flip a $0 visit to a several-hundred-dollar one regardless of how the visit is coded.
If you have ongoing conditions you want to discuss, ask whether it makes sense to schedule a separate follow-up appointment to keep the preventive visit clean.

During the visit:

Let your provider know at the start that your goal is a preventive wellness visit, and ask them to flag if the conversation is moving toward services that will be billed separately.
You're not obligating your provider to skip necessary care, you're just opening a conversation about how the appointment will be coded.

After the visit:

Request your Explanation of Benefits (EOB), a document your insurer sends that shows how a claim was processed, what was covered, and what you owe. Review it to confirm that preventive services were not billed with cost-sharing.
If you believe a covered preventive service was incorrectly billed, you have the right to appeal. Your insurer's EOB will include instructions. A patient advocate at your provider's billing office can also help identify coding errors.

Most split bills aren't mistakes. They're the system working as designed. Understanding the mechanics just means you're less likely to be surprised.

Where to Go From Here

If you're looking for a primary care provider who accepts your insurance and offers preventive wellness visits, the ProviderQuoHealth directory lets you search by location, specialty, and insurance. For more on what primary care providers do and when to see one, visit the primary care specialty page.

If you've already received a bill you think was coded incorrectly, start with your insurer's member services line and your EOB. From there, your provider's billing office is the right next call.

Important note

This article is for general information and is not medical advice. It is not a substitute for professional care from a licensed clinician. If you have a medical concern, talk to a healthcare provider. If you are experiencing a medical emergency, call 911 (in the U.S.) or your local emergency number.