To look up prescription prices, open the pharmacy's own app or website, search your exact drug, strength, and days supply, and read the cash price before checkout. Walmart shows estimated refill prices in its app under Services then Pharmacy; CVS shows them in its app with a free ExtraCare card linked; Costco lists them in its online pharmacy; and Amazon Pharmacy displays cash, coupon, and Prime prices when you search signed in (all as of 2026-05-30).
That one paragraph answers the core query. The rest of this hub explains the part the pharmacies do not make obvious: what their cash programs actually cover, where each one is genuinely the cheapest, and which optional paid tier (if any) is worth it. We use four abbreviations throughout, so let us define them up front. PBM means Pharmacy Benefit Manager, the middlemen who set insured drug prices. CMPP means the Costco Member Prescription Program, a free discount program. BMI is body mass index, which matters for the GLP-1 example below. And GLP-1, glucagon-like peptide-1, names the drug class that includes Ozempic.
01 / 08How do you look up prescription prices?
Every named pharmacy hides its cash price in a slightly different place, which is the whole reason a hub like this is useful. The general method is the same four steps regardless of chain, and it is worth doing at two or three pharmacies before you fill, because the spread on a single generic can be large.
Step one: find the lookup surface. At Walmart, that is the Walmart app under Services then Pharmacy then Refill prescriptions, signed in to a verified pharmacy account, where estimated refill prices appear (per Walmart Help, as of 2026-05-30). At CVS, it is the CVS Pharmacy app or a cvs.com account with ExtraCare linked. At Costco, it is the online pharmacy search at costco.com/pharmacy or a phone call to the counter. At Amazon, it is pharmacy.amazon.com signed in.
Step two: search the exact drug, strength in milligrams, and days supply. Step three: read the cash price, not just an insurance estimate. Amazon Pharmacy is the most transparent here, it shows price with insurance, without insurance, and the Prime or coupon price side by side. Step four: cross-check the number against a discount tool such as the RxGrab Pharmacy Finder or a GoodRx-style coupon, so you know whether the named-pharmacy price is actually competitive.
02 / 08What does each cash program cover?
Each pharmacy runs a different cash or loyalty structure, and understanding it is the difference between guessing and knowing. None of these requires you to pay to fill.
Walmart runs the $4 Generic Prescription Program: 30-day supplies start at $4 and 90-day supplies start at $10 for select generics, with the full list covering nearly 100 generic medications priced roughly $4 to $40 depending on drug and dose (GoodRx, FinanceBuzz, and SingleCare summarizing the program, as of 2026-05-30). The program needs no membership, no fee, and no insurance, per the Walmart $4 Prescriptions page (as of 2026-05-30). Antibiotics, antihistamines, and steroids are not included, prices can run higher in some states (notably California and Minnesota), and the program is unavailable in North Dakota (Walmart drug list and GoodRx, as of 2026-05-30).
CVS splits loyalty into two tiers. Free ExtraCare earns 2% back in ExtraBucks plus coupons; ExtraCare Plus, the rebranded CarePass (renamed January 2024), costs $5 per month or $48 per year and adds a $10 monthly bonus reward, free shipping, and added discounts (CVS, QuerySprout, and Fox Business reporting, as of 2026-05-30, re-verify the dollar amounts on cvs.com). Neither tier is required to get a cash price at the counter.
Costco runs the free Costco Member Prescription Program, the CMPP, which is separate from the paid warehouse membership and discounts both brand and generic drugs. Savings vary by drug and there is no published flat-rate price list, so we do not quote example CMPP prices (Costco CMPP FAQ, as of 2026-05-30). Members typically receive the deepest discounts, but you can fill at Costco pharmacy without a warehouse membership at all.
Amazon Pharmacy offers RxPass, a flat $5 per month add-on for Amazon Prime members that covers unlimited fills of more than 50 eligible generic medications spanning common conditions like diabetes, high blood pressure, and anxiety, with free delivery (Amazon, original launch January 24, 2023, still current as of 2026-05-30). RxPass requires an active Prime membership in addition to the $5 fee, and as of 2025 reporting it was available in 48 states (expanded to Texas in September 2025, still excluding California and Washington per mid-2025 reporting; verify the current state list on pharmacy.amazon.com/rxpass before relying on it). You do not need Prime or RxPass to fill at Amazon Pharmacy generally and see a cash or coupon price.
03 / 08How do the four pharmacies compare?
Here is the comparison at a glance. Because none of these pharmacies publishes a single flat per-drug price across its whole catalog, the table compares the cash program, the lowest documented generic floor, and the membership requirement rather than inventing per-drug dollar figures.
| Pharmacy | Cash program | Lowest generic floor | Membership to fill? |
|---|---|---|---|
| Walmart | $4 Generic Program | $4 / 30 days, $10 / 90 days | None |
| CVS | ExtraCare (free) + ExtraCare Plus ($5/mo) | Sale price, varies by drug | None |
| Costco | Member Prescription Program (free) | CMPP discount, varies by drug | None |
| Amazon Pharmacy | RxPass ($5/mo, Prime required) | $5/mo flat, 50+ generics | None to fill |
The visual below renders the same data as the table, so you can see at a glance where each pharmacy's cheapest documented path lands. It is a deliberately simple chart because, as noted above, three of the four programs publish no flat per-drug price, so any bar beyond Walmart's $4 floor would be invented. The honest read is: Walmart wins on single listed generics, Amazon RxPass wins on volume for people taking several generics, and CVS and Costco are drug-by-drug lookups.
04 / 08Where does Walmart win?
Walmart wins on single, listed generic drugs. If your medication is on the $4 list, you will struggle to beat $4 for a 30-day supply or $10 for a 90-day supply anywhere, and you need no membership, fee, or insurance to get it (Walmart $4 Prescriptions page, as of 2026-05-30). The catch is coverage: the list runs to nearly 100 generics priced $4 to $40, and it explicitly excludes antibiotics, antihistamines, and steroids, so a one-off course of medication may not qualify.
The lookup itself is mildly awkward. For drugs on the $4 list, no per-drug lookup is needed; the price is the price. For anything off the list, you open the Walmart app under Services then Pharmacy then Refill prescriptions to see an estimated refill price, or you ask the counter for a cash quote. Our full walkthrough, including the state exceptions and the downloadable drug-list PDF, is in the Walmart deep-dive linked at the bottom of this hub.
Cheapest documented floor on listed generics.
If your drug is on the $4 list, Walmart is the default winner: $4 for 30 days or $10 for 90 days, no membership, no insurance (as of 2026-05-30). Check the list first, because exclusions (antibiotics, antihistamines, steroids) and state pricing (CA, MN, and unavailable in ND) can change the answer.
05 / 08Where does CVS win?
CVS wins on convenience and footprint, and on one specific high-cost path that is easy to misread. The everyday story is simple: free ExtraCare earns 2% back in ExtraBucks plus coupons, and the optional ExtraCare Plus tier ($5 per month or $48 per year) adds a $10 monthly bonus reward (CVS, QuerySprout, and Fox Business reporting, as of 2026-05-30). For a cash price on a given drug, the CVS app or the counter quotes it, and ExtraCare sale prices apply automatically.
The path people misread is brand GLP-1s. Ozempic is a brand drug, FDA-approved for type 2 diabetes (not weight loss), and it is not on any cheap generic list. Its retail cash price at major pharmacies including CVS runs roughly $935 to $969 per month (2025 to 2026 reporting, as of 2026-05-30). The genuinely cheap path is not a CVS discount: it is Novo Nordisk's self-pay program, which is accessible at 9,000-plus CVS retail locations and via NovoCare and ozempic.com. As of 2026-05-30 that program prices the two lowest doses at a $199 per month introductory price through March 31, 2026, then $349 per month (0.25, 0.5, and 1 mg) and $499 per month (2 mg) (PRNewswire and CNBC, November 2025). If you are reading this near or after March 31, 2026, treat the $199 introductory price as likely ended and check current pricing.
06 / 08Where does Costco win?
Costco wins on a fact that surprises most people: you do not need a Costco membership to fill a prescription at Costco pharmacy, online or in warehouse (Costco customer service, Clark.com, and RxSaver, as of 2026-05-30). The mechanism is partly legal: some states require warehouse-club pharmacies to serve non-members, and California explicitly mandates it (though it may permit a small surcharge). This is state law that varies by state, not a single federal statute (ConsumerAffairs and RxSaver, as of 2026-05-30).
On top of that, the free Costco Member Prescription Program discounts brand and generic drugs and is separate from the paid warehouse membership (Costco CMPP FAQ, as of 2026-05-30). Savings vary by drug, members typically get the deepest discounts, and there is no published flat-rate price list, so we do not invent example prices. To look up a Costco price, search the drug in the online pharmacy or call the counter for a cash quote. The no-membership entry tip and the CMPP enrollment walkthrough are in the Costco deep-dive below.
07 / 08Where does Amazon Pharmacy win?
Amazon Pharmacy wins on two fronts: price transparency and volume economics. On transparency, it is the only one of the four that shows price with insurance, without insurance, and the Prime or coupon price side by side when you search a drug signed in, before you commit. On volume, RxPass is the standout: a flat $5 per month for Prime members covering unlimited fills of more than 50 generics (Amazon, as of 2026-05-30). For someone on several maintenance generics, that flat fee can undercut even per-drug $4 pricing.
The fine print matters. RxPass requires an active Amazon Prime membership in addition to the $5 fee (re-verify the current Prime price on amazon.com), and the state list is the most change-prone item: 48 states as of 2025, expanded to Texas in September 2025, still excluding California and Washington per mid-2025 reporting. Verify the current state list on pharmacy.amazon.com/rxpass before relying on it (as of 2026-05-30). For non-RxPass drugs, Amazon shows per-drug cash and coupon prices at checkout.
Compare all four named-pharmacy prices for your exact drug
The four guides below walk each pharmacy's lookup screen step by step. To pull live cross-pharmacy prices for a specific medication, start with the Pharmacy Finder.
08 / 08Which lookup should you start with?
Start with the pharmacy whose cash program fits your situation. If you take one or two common generics, check the Walmart $4 list first, it is the cheapest documented floor (as of 2026-05-30). If you take several maintenance generics, price out Amazon RxPass, because a flat $5 per month for 50-plus generics can beat per-drug pricing on volume. If you already shop Costco or live in a state that mandates non-member pharmacy access, run your drug through the free CMPP. And if you want the widest retail footprint with automatic loyalty pricing, use the CVS app, just do not mistake the manufacturer Ozempic self-pay price for a CVS discount.
Whichever you start with, look up the same drug at a second pharmacy before you fill. The cash spread on a single generic can be several multiples, and the only way to know is to check. The four deep-dive guides below show you exactly where each pharmacy surfaces its price.
Every figure cited and dated, no exceptions.
We cite each price and program term to a primary or named secondary source and stamp it with a verification date, because pharmacy pricing changes constantly. Read the full methodology →
Primary first
Pharmacy program pages, FDA, and NovoCare quoted before any aggregator.
Dated figures
Every dollar amount carries an "as of 2026-05-30" freshness stamp.
No invented prices
Where a program publishes no flat price, we say "varies" rather than guess.
Re-verify flags
Volatile items (Ozempic, RxPass state list) are flagged for re-check at publish.