# Medical vs. pharmacy benefits. Two ways your plan pays for drugs.

Source: https://ethosbenefits.com/benefits-101/medical-vs-pharmacy-benefits
Type: Benefits 101
Topic: Pharmacy and PBMs
Author: Meghan Anderson, Account Executive
Reviewed by: Patrick Ansara, Partner and Director of Client Operations
Publisher: Ethos Benefits
Published: 2025-12-05
Last updated: 2026-11-03
Cite as: "Medical vs. pharmacy benefits," Ethos Benefits, https://ethosbenefits.com/benefits-101/medical-vs-pharmacy-benefits, updated 2026-11-03.

**Short answer:** The medical benefit and the pharmacy benefit are two ways your health plan pays for care. The medical benefit, run by your carrier or TPA, pays for drugs a provider gives in a clinic or hospital and bills after the visit. The pharmacy benefit, run by a PBM, pays for prescriptions filled at a pharmacy, in real time.

## How do medical and pharmacy benefits compare?

Medical and pharmacy benefits are two separate systems your health plan uses to pay for drugs. The medical benefit pays for care and for drugs a provider gives in a clinic, hospital or infusion center. The pharmacy benefit pays for prescriptions filled at a pharmacy. Each has its own administrator, claim format, pricing and rules.

| | **Medical benefit** | **Pharmacy benefit** |
|---|---|---|
| **Who administers it** | Your insurance carrier (fully insured) or your TPA (self-funded) | A pharmacy benefit manager (PBM), contracted directly or through the carrier or TPA |
| **How claims are paid** | The provider bills after the visit on a standard medical claim, using procedure and drug codes. The claim is priced days or weeks later | The pharmacy submits the claim electronically at the counter. It is approved and priced in seconds, by the drug's NDC |
| **Cost sharing** | The medical deductible, copays and coinsurance. The member often learns the cost when the bill or EOB arrives | Formulary tiers with copays or coinsurance, sometimes a separate pharmacy deductible. The member pays at pickup |
| **Prior authorization** | Run by the carrier or TPA's medical management team under its medical policies | Run by the PBM, along with step therapy, quantity limits and formulary exclusions |
| **Specialty drugs** | Drugs a provider administers, such as infusions and many injectables (oncology, immunology, some biologics) | Drugs the member takes or self-injects at home, filled by a specialty pharmacy |
| **Site of care** | Hospital outpatient department, physician office, ambulatory infusion center or home infusion | Retail, mail-order or specialty pharmacy, delivered or picked up |
| **Data your plan gets** | Medical claims, often with drug codes that are less specific than an NDC and drug cost bundled into a facility bill | Line-level pharmacy claims with the NDC, quantity, days' supply and ingredient cost |
| **Manufacturer rebates** | Historically limited | Negotiated by the PBM. How much reaches the plan depends on the PBM contract |

Both benefits are part of the same group health plan, and both are subject to the same federal rules on appeals, preventive care and out-of-pocket limits. The split is about administration and pricing, not about whether something is covered.

## What does the medical benefit cover?

The medical benefit pays for nearly everything a provider does: office visits, specialist visits, emergency care, inpatient stays, surgery, lab work, imaging and preventive care. It also pays for drugs given to the patient as part of that care.

Those provider-administered drugs are usually paid through what the industry calls **buy and bill**. The hospital or physician practice buys the drug, stores it, gives it to the patient and then bills your plan for both the drug and the administration. The plan pays whatever its carrier or TPA contract allows for that drug at that site.

Two things make buy and bill hard to manage:

- **Pricing follows the facility.** A hospital outpatient department, a physician office and a home infusion provider can bill very different amounts for the same drug and dose. The drug price is set by the provider contract, not by a drug-specific negotiation.
- **Visibility is limited.** Medical claims report drugs with procedure codes and units, and on facility claims the drug can sit inside a larger bill. That makes it harder to see what the plan paid for a specific drug than on the pharmacy side.

Cost sharing for medical claims runs through the plan's medical deductible, copays and coinsurance. Because the claim is priced after the visit, members often don't know their share until the explanation of benefits arrives.

## What does the pharmacy benefit cover?

The pharmacy benefit pays for outpatient prescriptions: generics, brand drugs, maintenance medications and self-administered specialty drugs, filled at a retail pharmacy, by mail order or by a specialty pharmacy.

A PBM runs it. The PBM:

- **Builds the formulary,** the list of covered drugs and the tier each one sits on.
- **Contracts the pharmacy network** and sets what each pharmacy is paid.
- **Processes claims in real time** at the pharmacy counter.
- **Negotiates rebates** with drug manufacturers.
- **Runs utilization management,** including prior authorization, step therapy and quantity limits.

Pharmacy claims move on a national electronic standard. Federal HIPAA transaction rules adopt the NCPDP Telecommunication Standard for retail pharmacy drug claims and the ASC X12 837 formats for professional and institutional medical claims ([45 CFR 162.1102](https://www.law.cornell.edu/cfr/text/45/162.1102)). That difference is why a pharmacy claim is approved in seconds and a medical claim takes weeks.

Cost sharing usually follows tiers. A common design puts generics on the lowest tier, preferred brands next, non-preferred brands above that, and specialty drugs on the highest tier. Members pay their share at pickup.

How the PBM is paid matters as much as the formulary. Spread pricing, rebate retention and network pricing terms all sit in the PBM contract. See [PBM spread pricing](https://ethosbenefits.com/benefits-101/pbm-spread-pricing) and [what a pharmacy benefits administrator does](https://ethosbenefits.com/benefits-101/pharmacy-benefits-administrator).

## Why can one drug be billed either way?

Many specialty drugs, particularly injectables and infusions, can be covered under either benefit. Which one applies depends on who gives the drug, where, and how it reaches the provider. Your plan's medical policy and the PBM's formulary decide the rules, and they don't always agree.

There are four common paths:

| Path | How the drug gets to the patient | Which benefit pays for the drug |
|---|---|---|
| **Buy and bill** | The hospital or clinic buys the drug, administers it and bills the plan | Medical |
| **Specialty pharmacy** | A specialty pharmacy dispenses a self-administered drug to the member at home | Pharmacy |
| **White bagging** | A specialty pharmacy dispenses the drug for a specific patient and ships it to the clinic or hospital, which administers it | Pharmacy for the drug, medical for the administration |
| **Brown bagging** | The member receives the drug from a specialty pharmacy and carries it to the provider's office to be administered | Pharmacy for the drug, medical for the administration |

**White bagging** lets the plan pay the PBM's negotiated price instead of the facility's markup, and it brings the drug into the PBM's rebate and reporting stream. Some hospitals push back on it because they lose control of the drug's handling and storage, and some decline to administer drugs they didn't source.

**Brown bagging** is the least common. Many providers won't accept a drug the patient carries in, because they can't verify how it was stored or handled. For temperature-sensitive biologics, that concern is real.

Another variation, sometimes called **clear bagging**, is when a health system's own specialty pharmacy dispenses the drug to its own infusion clinic. The drug runs through the pharmacy benefit but stays inside the hospital system.

## How does the benefit change plan cost?

The benefit a drug runs through can change what your plan pays for it, often by more than any formulary or rebate decision. For a self-funded employer, three things drive the difference.

1. **Who sets the price.** Under buy and bill, the price comes from the provider contract and the site of care. Under the pharmacy benefit, it comes from the PBM contract. The same drug can be priced very differently by each.
2. **Site of care.** Infusions given in a hospital outpatient department often cost the plan more than the same drug in a physician office, an independent infusion center or at home. Site-of-care programs that move stable patients to a lower-cost setting are one of the more direct ways to manage medical drug spend.
3. **Rebates and data.** Pharmacy claims carry the NDC, so the PBM can tie rebates and reports to each drug. Medical drug claims are coded less precisely, which has historically made rebates rarer and drug-level reporting harder.

The plan has to look at both sides together. A drug that moves off the pharmacy benefit can look like a savings in the PBM report while the medical claims for the same drug go up. Shifting a drug the other way can lower its price but add administration fees and access issues if the provider won't accept white-bagged drugs.

Federal reporting already treats them together. Under the prescription drug and health care spending report, often called RxDC, group health plans report total spending broken out by hospital costs, provider and clinical service costs, prescription drug costs and other medical costs, along with rebates and their effect on premiums ([29 U.S.C. 1185n](https://www.law.cornell.edu/uscode/text/29/1185n)). Carriers, TPAs and PBMs usually file it for the plan, but the plan can ask for the data behind it.

New federal PBM rules in the Consolidated Appropriations Act, 2026 (Public Law 119-75) add reporting to plan sponsors and rebate pass-through requirements for PBMs serving ERISA plans, with most obligations starting in later plan years. Those rules reach the pharmacy benefit. Drugs paid under buy and bill run through the medical claim system, so they generally won't appear in a PBM's report.

## How do deductibles and out-of-pocket limits work?

Medical and pharmacy benefits can have separate deductibles and even separate out-of-pocket limits, but the Affordable Care Act caps the total. The Departments of Labor, HHS and Treasury allow plans to use separate out-of-pocket limits for different categories of benefits, such as one for medical and one for prescriptions from a PBM, as long as the combined limits for essential health benefits don't exceed that year's federal maximum ([DOL ACA FAQ Part XVIII](https://www.dol.gov/agencies/ebsa/about-ebsa/our-activities/resource-center/faqs/aca-part-18)). Mental health parity rules add one more limit: a plan cannot run a separate out-of-pocket maximum for mental health and substance use disorder benefits apart from medical and surgical benefits in the same classification.

Preventive care gets special treatment on both sides. The ACA requires non-grandfathered plans to cover recommended preventive services, including immunizations recommended by the Advisory Committee on Immunization Practices, without cost sharing ([42 U.S.C. 300gg-13](https://www.law.cornell.edu/uscode/text/42/300gg-13)). A vaccine given at the doctor's office is usually paid under the medical benefit, and the same vaccine at a retail pharmacy is usually paid under the pharmacy benefit. The member pays nothing either way, if the plan covers that vaccine in that setting and the provider is in network.

What members feel day to day:

- **Timing.** Pharmacy cost sharing is known and paid at the counter. Medical cost sharing often arrives weeks later.
- **Approvals.** A drug on the pharmacy side may need PBM prior authorization or step therapy. The same drug on the medical side goes through the carrier or TPA's medical management instead. Neither path is automatically easier.
- **Appeals.** For ERISA plans, federal claims and appeals rules apply to both. The appeal runs through whichever administrator handled the claim.

## Medical vs. pharmacy, by example.

A cancer patient who receives IV chemotherapy at a hospital infusion center uses the **medical benefit**. The hospital buys the drug, gives it and bills the plan.

If the same patient's oncologist prescribes an oral cancer drug taken at home, it runs through the **pharmacy benefit**, filled by a specialty pharmacy.

If the plan's PBM requires that the infused drug be sourced through its specialty pharmacy and shipped to the infusion center, that is **white bagging**. The drug is paid under the pharmacy benefit, and the infusion visit is paid under the medical benefit.

A patient with rheumatoid arthritis may switch between benefits for the same condition: a self-injected biologic at home under the pharmacy benefit, and later an infused biologic at a clinic under the medical benefit. The plan's cost for that patient can change sharply with that switch, even if the drug class does not.

## What should you ask your vendors?

For an employer plan, the useful questions sit where the two benefits meet.

1. **Which specialty drugs are paid on each side?** Ask your TPA or carrier for medical drug spend by drug and site of care, and your PBM for specialty spend by drug.
2. **What does the plan pay for the top medical drugs at each site?** Hospital outpatient, physician office and home infusion prices for the same drug are worth comparing.
3. **Does the plan have a site-of-care or white bagging policy?** If so, how many members does it apply to, and are any providers refusing it?
4. **Are rebates collected on medical drugs?** If not, ask why, and whether the PBM or TPA could do it.
5. **Who owns the data?** Confirm the plan can get line-level claims from both sides, so drug spend can be seen in one place.

These questions are part of a [PBM review](https://ethosbenefits.com/services/pharmacy-pbm), where Ethos Benefits looks at both sides of drug spend together. For how to evaluate the PBM itself, see [how to choose a PBM](https://ethosbenefits.com/benefits-101/how-to-choose-a-pbm), and for how plan funding affects your control over pharmacy, see [self-funded health insurance](https://ethosbenefits.com/benefits-101/self-funded-health-insurance). More on this topic sits under [Pharmacy and PBMs](https://ethosbenefits.com/topics/pharmacy).

## On the podcast

- [PBM Spread Pricing Hides in the Contract: Trace Voshell on generic drug costs](https://ethosbenefits.com/podcast/pbm-spread-pricing-trace-voshell), The Business of Benefits, Episode 69

## Frequently asked questions

### What are medical benefits?

Medical benefits are the part of an employer's health plan that pays for care from doctors, hospitals and other providers, including office and specialist visits, emergency care, inpatient stays, surgery, lab work, imaging and preventive care. They also pay for drugs a provider gives during that care, such as infusions. Members share the cost through the medical deductible, copays and coinsurance.

### What is the difference between a medical benefit and a pharmacy benefit?

The medical benefit pays for care and drugs a provider gives you in a clinic, hospital or infusion center, and the provider bills the plan afterward. The pharmacy benefit pays for prescriptions filled at a retail, mail-order or specialty pharmacy, and the claim is approved at the counter in real time.

### Can the same drug be covered under both the medical and pharmacy benefit?

Yes. Many specialty drugs, especially injectables and infusions, can be billed under either benefit depending on who gives the drug and where. Your plan's medical policy and PBM formulary decide which benefit a drug falls under, and the price the plan pays can differ a lot between the two.

### Do medical and pharmacy benefits have separate deductibles?

They can. A plan may use separate deductibles and even separate out-of-pocket limits for medical and pharmacy, but under the Affordable Care Act the combined out-of-pocket limits for essential health benefits cannot exceed the annual federal maximum. Mental health parity rules also bar a separate out-of-pocket maximum for mental health and substance use disorder benefits.

### What is white bagging?

White bagging is when a specialty pharmacy dispenses a provider-administered drug under the pharmacy benefit and ships it to the clinic or hospital that will give it to the patient. The plan pays the pharmacy price for the drug and pays the provider separately to administer it.

### Who manages the pharmacy benefit on a self-funded plan?

Usually a pharmacy benefit manager (PBM) that the plan contracts with directly or through its carrier or TPA. The PBM builds the formulary, runs the pharmacy network, processes claims and negotiates manufacturer rebates, under the terms of the plan's PBM contract.

### Can a plan appeal a denied drug under either benefit?

Yes. For ERISA plans, the federal claims and appeals rules apply to both medical and pharmacy claims. The process runs through whoever administers that benefit, so a denied infusion goes through the medical side and a denied prescription goes through the PBM.

## Sources

1. [29 U.S. Code § 1185n, Reporting on pharmacy benefits and drug costs](https://www.law.cornell.edu/uscode/text/29/1185n), Legal Information Institute, Cornell Law School
2. [45 CFR § 162.1102, Standards for health care claims or equivalent encounter information](https://www.law.cornell.edu/cfr/text/45/162.1102), Legal Information Institute, Cornell Law School
3. [FAQs about Affordable Care Act Implementation (Part XVIII) and Mental Health Parity Implementation](https://www.dol.gov/agencies/ebsa/about-ebsa/our-activities/resource-center/faqs/aca-part-18), U.S. Department of Labor, Employee Benefits Security Administration
4. [42 U.S. Code § 300gg-13, Coverage of preventive health services](https://www.law.cornell.edu/uscode/text/42/300gg-13), Legal Information Institute, Cornell Law School