- Concord Health Supply offers the best authorized dealer pricing on premium pulse oximeters, with the Nonin 9590 at $199 with free shipping.
- Allegro Medical carries the widest range of medical supplies, from wound care to mobility aids, all from one authorized retailer.
- Amazon delivers the fastest shipping (1-2 days with Prime) and the most generous return policy in e-commerce.
A Nonin Onyx Vantage 9590 pulse oximeter costs $199 at Concord Health Supply with free USPS shipping and a 4-year warranty. The same device runs $195 to $250 on Amazon depending on the seller, and $195 to $210 at Allegro Medical. That price difference matters less than where the device actually comes from, because authorized dealer status determines whether your warranty is valid and whether the device is guaranteed genuine.
Concord, Allegro, and Amazon each solve a different problem. Concord is the pulse oximeter specialist. Allegro is the full-catalog medical supply store. Amazon is the speed-and-convenience play. Here's who wins for what.
Product Selection: What Can You Actually Buy?
Concord Health Supply focuses on pulse oximeters, blood pressure monitors, thermometers, nebulizers, and CPAP supplies. The catalog is intentionally focused. Within that niche, the selection runs deep: they carry their own budget-friendly Concord brand alongside premium names like Nonin, Masimo, Contec, and Omron. If you specifically need a pulse oximeter, Concord's range of models and brands is the deepest of the three.
Allegro Medical is a full-service online medical supply retailer with thousands of products across dozens of categories. Wound care, mobility aids, bathroom safety, incontinence supplies, orthopedic supports, diabetic supplies, respiratory equipment, and monitoring devices. You can buy a blood pressure monitor, a raised toilet seat, compression stockings, and wound care dressings in a single order. For anyone outfitting a home for an aging parent or managing ongoing medical supply needs, this breadth of catalog is genuinely useful.
Amazon carries everything in the medical supply category, from $15 fingertip oximeters to $400 Masimo devices to full hospital beds. The selection is unmatched by any single retailer. Omron, one of the most trusted names in home blood pressure monitors, sells directly on Amazon as an authorized channel. For categories where major brands have an official Amazon presence, the selection and pricing are strong.
Selection winner: Allegro Medical for the widest range of legitimate medical supplies from one retailer. Concord for the deepest pulse oximeter selection from authorized sources. Amazon for categories where brands sell directly on the platform.
Pricing: Where Does Your Dollar Go Furthest?
Nonin Onyx Vantage 9590 (Clinical-Grade Pulse Oximeter)
- Concord Health Supply: $199 with free USPS shipping. Authorized dealer with full 4-year manufacturer warranty included.
- Allegro Medical: $195 to $210. Authorized dealer with manufacturer warranty.
- Amazon: $170 to $250 depending on seller. Omron and some brands sell directly, but for Nonin specifically, check that the seller is authorized to ensure your warranty stays valid.
Concord and Allegro are neck and neck on the Nonin 9590. The 4-year warranty through Concord's authorized dealer status is a strong perk. Amazon's pricing varies by seller, and the lowest prices come with full warranty protection when you buy from authorized sellers on the platform.
Basic Fingertip Pulse Oximeter (Budget Category)
- Concord Health Supply: $15 to $25 for the Concord brand. A solid entry point with a known seller and clear return policy.
- Allegro Medical: $20 to $40 across various brands.
- Amazon: $10 to $30 with dozens of brands available, including well-reviewed options from iHealth and Zacurate.
For casual spot-checking, all three offer affordable options. Concord's budget line is purpose-built for home use and comes from a company that specializes in exactly this product category.
Omron Blood Pressure Monitor (Upper Arm, Basic Model)
- Concord Health Supply: $40 to $55.
- Allegro Medical: $45 to $60.
- Amazon: $35 to $50, often on sale. Omron sells directly on Amazon as an authorized channel.
Pricing winner: Concord Health Supply for premium pulse oximeters with authorized warranty protection. Amazon for blood pressure monitors and other categories where brands sell directly on the platform.
Authorized Dealer Status and Warranty Protection
For medical devices, authorized dealer status matters because it determines whether your manufacturer warranty is valid. A device purchased from an unauthorized seller may work perfectly, but if something goes wrong, the manufacturer has no obligation to honor the warranty.
Concord Health Supply is an authorized dealer for Nonin, Masimo, and other brands they carry. Every product comes with the manufacturer's full warranty (4 years on the Nonin 9590), and they source directly from the manufacturer. This is their strongest selling point for premium devices.
Allegro Medical is also a legitimate authorized medical supply retailer that sources from authorized channels. They've been in business for years and carry FDA-cleared products. The warranty situation is clear and straightforward.
Amazon works well for brands that sell directly on the platform. Omron, for example, has an official Amazon storefront. For those brands, you get the same warranty protection as buying from any authorized retailer. For brands like Nonin and Masimo, check the seller carefully: look for “Ships from and sold by Amazon” or the brand's own storefront to ensure warranty coverage.
Authenticity winner: Concord Health Supply and Allegro Medical for guaranteed authorized dealer status across their entire catalog. Amazon for brands with official storefronts on the platform.
Shipping Speed and Cost
- Concord Health Supply: Free standard USPS shipping on all orders. Delivery takes 5 to 7 business days. Expedited options available at extra cost for urgent needs.
- Allegro Medical: Free shipping on orders over $50 to $75 (varies by promotion). Standard delivery in 5 to 10 business days. Similar timeline to Concord.
- Amazon: Prime members get free 1 to 2 day shipping on most items. Non-Prime orders typically arrive in 3 to 5 days. The fastest option by a wide margin.
Shipping winner: Amazon. Prime's 1-2 day delivery is unmatched. Concord's free USPS shipping on all orders (no minimum) is a solid perk for planned purchases where speed isn't critical. Allegro's free shipping threshold means you'll want to consolidate orders.
Customer Service and Returns
Concord Health Supply operates as a focused, specialized retailer. Their support team handles inquiries by email and phone. Returns accepted within 30 days for unopened items, and defective items are replaced under the manufacturer's warranty. The specialized focus means the team knows their product category well.
Allegro Medical offers phone support during business hours, email support, and detailed product information on their website. Returns are accepted within 30 days. Their broader catalog means they field a wider range of product questions, and the support team is knowledgeable across categories.
Amazon has the most generous return policy in e-commerce. Most items can be returned within 30 days for a full refund with free return shipping. Drop-off options at UPS, Whole Foods, and Kohl's make the process convenient. Customer service is available 24/7 by phone, chat, and email. Refunds process quickly.
Customer service winner: Amazon for the easiest returns and 24/7 availability. Concord for product-specific expertise on pulse oximeters and monitoring equipment.
Who Wins for Each Situation
- Premium pulse oximeter (Nonin, Masimo): Concord Health Supply. Best authorized dealer pricing with full manufacturer warranty and free shipping.
- Multiple pulse oximeters for family or clinic: Concord Health Supply. Deepest selection in the category with competitive volume pricing.
- Blood pressure monitor: Amazon. Omron sells directly on the platform with strong pricing and Prime shipping.
- Full home health setup (multiple supply categories): Allegro Medical. One order covers monitoring, mobility, bathroom safety, wound care, and more.
- Outfitting a home for aging parents: Allegro Medical. The broadest catalog of home health products from one trusted source.
- Urgent need (need it tomorrow): Amazon. Prime 1-2 day delivery is unbeatable for time-sensitive purchases.
- Budget fingertip oximeter for casual use: Amazon or Concord. Both have solid options under $25.
- CPAP supplies: Concord Health Supply for oximeters and monitoring accessories. Allegro Medical for a wider range of respiratory supplies.
The Bottom Line
Buy the important monitoring devices (pulse oximeters, clinical-grade equipment) from Concord or Allegro, where authorized dealer status guarantees your warranty and product authenticity. Buy commodity supplies and items from brands with official Amazon storefronts from Amazon, where Prime shipping and easy returns add real convenience.
Concord's sweet spot is premium pulse oximeters at the best authorized price with free shipping. Allegro's sweet spot is one-stop shopping for a full range of medical supplies. Amazon's sweet spot is speed and convenience for brands that sell directly on the platform.
For pulse oximeters, Concord Health Supply is the winner: $199 for the Nonin 9590 with free shipping, a 4-year warranty, and zero question marks about authenticity. For everything else in the medical supply world, Allegro or Amazon will serve you better depending on whether you need breadth of catalog or speed of delivery.
