CVS vs. Walgreens vs. Walmart: Part D Costs (2026–2027)
Bottom Line
No pharmacy chain is consistently cheapest for Part D: preferred status depends on the plan and exact store. Compare CVS, Walgreens, Walmart and designated mail order using identical prescriptions and supply lengths, including annual premiums and drug spending.
CVS, Walgreens and Walmart can each be the lower-cost choice under Medicare Part D. Compare the same prescriptions, quantities and coverage year under the same plan at each pharmacy, then repeat with other plans and mail order. A pharmacy that accepts your plan may have standard rather than preferred cost sharing, which can change your bill.
If you are also reviewing life insurance for your family or estate, comparing guaranteed universal life rates is a separate coverage and budgeting decision. Life insurance is not a Medicare benefit or a condition of getting prescription coverage.
Start with the right coverage comparison
When you explore Medicare prescription drug coverage, distinguish a standalone Part D plan from Medicare Advantage with drug coverage, often called MA-PD. A standalone plan can supplement Original Medicare, Parts A and B; an MA-PD plan combines medical and drug coverage. This page focuses on standalone plans. If you have MA-PD, compare pharmacies within that plan and consider its medical coverage before changing plans.
Medigap, also called Medicare Supplement insurance, helps with certain Original Medicare expenses. Policies sold after 2005 do not include prescription coverage, so Medigap is not the drug plan to select in a pharmacy comparison.
CVS vs. Walgreens vs. Walmart: what actually differs?
Preferred status belongs to a particular plan’s network. It is not a permanent designation that makes a chain cheapest for everyone.
These documented 2026 examples show why all three chains deserve a place in your comparison. They are not personalized quotes or confirmation that a particular store participates.
| Pharmacy option | Documented 2026 example | What to check before choosing |
|---|---|---|
| CVS | Wellcare lists CVS among preferred pharmacies for Value Script. | Confirm your store’s status and your prescriptions’ tiers in the exact plan. |
| Walgreens | Wellcare also lists Walgreens among preferred pharmacies for Value Script. | Compare the complete drug list against CVS; preferred status alone does not establish the lowest annual total. |
| Walmart | Humana Value Rx lists Walmart among preferred pharmacies and advertises $0 copays for covered Tier 1 and Tier 2 drugs at preferred pharmacies. | Check local plan availability and whether your medications fall into those tiers. |
| Mail order | Wellcare identifies Express Scripts Pharmacy as its preferred mail service; Humana Value Rx lists CenterWell Pharmacy. | Price the plan’s designated service using the same days’ supply as retail. |
For 2026, Wellcare lists CVS and Walgreens as preferred pharmacies for Value Script, while Humana Value Rx includes Walmart among preferred locations. Wellcare’s designated preferred mail service is Express Scripts Pharmacy. Confirm the exact location before transferring prescriptions.
Some plans structure their networks differently. Aetna says its 2026 SilverScript Choice plans do not require preferred pharmacies to obtain their lowest cost sharing.
To evaluate Wellcare and SilverScript prescription cost differences, compare locally available plans using the identical medication list and pharmacy addresses. A preferred-pharmacy label cannot replace that comparison.
A concrete prescription example
Consider atorvastatin 20 mg tablets, quantity 30 for 30 days, as a coverage illustration. Wellcare’s October 2026 Value Script formulary lists this strength in Tier 1, with a quantity limit of 30 tablets per 30 days. This is an example for comparing an existing prescription, not a dosing recommendation.
For California’s 2026 Value Script plan, the published Tier 1 schedule is $0 at preferred retail pharmacies and $15 at standard retail pharmacies, with no Tier 1 deductible. For an eligible 90-day fill, preferred retail and preferred mail order both have a $0 Tier 1 copay.
The standard-retail charge can be below $15 when the drug’s price is lower than the copay.
This illustrates a real benefit difference, but it does not establish a Walmart price or verify your nearest CVS or Walgreens. Match the store to the plan’s current directory before applying the preferred or standard rate.
Run a matched comparison for your prescriptions
Use Medicare’s plan comparison tool to estimate monthly and yearly expenses for the drugs you enter.
- Set the location and coverage year. Use your ZIP code and county, then select standalone drug plans. Keep 2026 refill decisions separate from shopping for 2027 coverage.
- Enter every prescription exactly. Include name, strength, tablet or other form, quantity, refill frequency and brand or generic. Do not substitute a different drug to make an estimate cheaper.
- Select actual pharmacy locations. Compare your nearby CVS, Walgreens and Walmart, plus the plan’s mail-order option. Record network status separately for each plan.
- Keep the prescription list unchanged. First compare pharmacies within one plan. Then repeat for the other plans on your shortlist.
- Record both annual and early-year costs. Save the annual estimate for drugs and premiums, deductible treatment, individual drug costs and coverage restrictions. Note whether Extra Help is reflected in the estimate.
For readers taking Eliquis, checking Eliquis coverage under Part D means verifying the exact strength, quantity, formulary tier and pharmacy for each plan. For example, if your existing prescription is 5 mg tablets, quantity 60 for 30 days, use that same entry across all options. Do not compare it with a starter pack or a different strength.
A listed drug can still have prior authorization, step therapy or quantity limits. Confirm those rules before enrolling; a low estimate is less useful if the prescription cannot be filled under the plan’s requirements.
Compare mail order with an equal retail supply
Some plans offer up to a three-month supply through mail order, and some retail pharmacies also dispense longer supplies. Compare 90 days with 90 days whenever both are available.
Do not assume home delivery from a local store uses the plan’s mail-order benefit. Wellcare, for example, says retail pharmacies’ home deliveries use retail cost sharing.
Mail order may fit a stable maintenance prescription. Before choosing it, ask about delivery timing, temperature-sensitive shipping if relevant, refill approvals and how to obtain an urgent supply locally. For a new medicine or a changing dose, discuss the appropriate fill quantity with your prescriber.
Compare annual spending, not just the next copay
For a full-year comparison, add annual plan premiums to estimated out-of-pocket prescription expenses. Include deductible-stage spending once; do not add the deductible again if it is already included in the estimate.
Hypothetical calculation: a $20 monthly premium plus $300 in annual prescription expenses totals $540. A $5 premium plus $600 in prescription expenses totals $660. These invented figures illustrate the arithmetic and are not available plan or pharmacy quotes.
For 2026, the maximum Part D deductible is $615, although some plans have lower deductibles or exempt certain drugs. The annual out-of-pocket threshold for covered Part D drugs is $2,100; after reaching it, you pay nothing for covered Part D drugs for the rest of the year.
Understanding what counts toward the Part D spending cap keeps that limit in perspective. Covered-drug deductibles, copays and coinsurance count, along with certain payments made on your behalf. Premiums, noncovered drugs and Part A or Part B drug expenses do not. Check the plan’s Explanation of Benefits for your running total.
If a pharmacy offers a lower cash or discount-card price, ask the plan whether that purchase can be credited or reimbursed. Do not assume it counts automatically. Keep receipts: Wellcare specifically instructs members to submit receipts for covered drugs bought at special prices outside its benefit.
Recheck the plan and pharmacy before renewal
When considering options after a Part D premium increase, compare total annual expenses, formulary changes and pharmacy status. Review the Annual Notice of Change and the next year’s plan documents before deciding whether to stay.
The 2026 benefits above are not 2027 quotes. For coverage starting January 1, 2027, use 2027 plan details and estimates. Medicare’s annual Open Enrollment runs October 15 through December 7, with changes effective January 1 of the following year.
That enrollment window does not generally guarantee the right to buy Medigap without medical underwriting; Medigap has separate enrollment protections.
Gather your current plan name, prescription list and pharmacy addresses, then use Medicare Plan Finder to compare CVS, Walgreens, Walmart and mail order under your strongest plan candidates. Save the best two annual estimates and confirm drug coverage, restrictions and pharmacy status with each plan before enrolling.