American Medical Sales and Rentals Customer Service

Updated: May 1, 2023

From ordering to shipping options to processing a return, we're here to help 364 days a year. Contact us by phone, email or visit our showroom in Centennial, Colorado. Our goal to to Make Life with Oxygen Easier.

  About Us

Oxygen Concentrator Store from American Medical Sales and Rentals has been providing oxygen therapy experience since 2001 and is one of the oldest and most experienced oxygen therapy retailers in North America. We are accredited by the Accreditation Commission for Health Care and currently hold a national BBB A+ rating.

Please visit our About Us page to learn more.

  Contact Information

Our customer service department is open Monday thru Friday 8:00 am to 6:00 pm and on Saturday from 8:30 am to 4:00 pm. Please contact with us with any questions by phone, email, mail, phone or our contact form.

Customer Service Department
15055 E. Hinsdale Drive
Centennial, CO 80112

Customer Service Number: 877.774.9271
Customer Service Email:
Or complete our Support Contact Form and one of our agents will review and respond with one business day.

  Pricing, Payment and Promo Codes

Pricing: As with most aspects of the medical world, pricing on oxygen therapy equipment can be confusing. Our team of Oxygen Experts is here assist with pricing questions and help you better understand the marketplace. Additional information about pricing and sales tax is available on our Pricing and Payment Page. If you have immediate questions about pricing, please contact us at 877.774.9271

Price Matching: If you find a lower price on an identical name-brand product from a reputable website, we will happily match the price at the time of your purchase. Some exclusions and restrictions apply.

Pricing Errors: Oxygen Concentrator Store and American Medical Sales and Rentals reserves the right to change prices for products at any time, and to correct pricing errors that may inadvertently occur.

Payment Methods: We accept a variety of payment methods:
  • Care Credit
  • Cash
  • Credit Cards or Debit Cards: American Express, Discover, MasterCard, Visa
  • Affirm
  • PayPal
Promo Code or Coupon Code: On the Shopping Cart Checkout page enter the Discount Codes then click "Apply Coupon." The coupon code will be applied to your order. You can also enter a promo code on the final checkout page.

  Returns and Exchange Policy

We want our customers to be happy with our products and service. Our customer satisfaction policy allows you to return or exchange any item you purchase from us within 15 days of receipt of unit. Please see satisfaction policy links below for specific terms and conditions. It is our goal to ensure that you are 100% completely satisfied with your purchase of any of our products. Please contact us with any questions or concerns.

Please visit our Customer Return Policy page or go directly to the Concentrator Customer Satisfaction Policy page or the CPAP and BiPAP Customer Satisfaction Policy for detailed return and exchange terms and conditions.


When you're buying a product online, you should buy only from a business accredited by a reputable source, such as the Better Business Bureau, and one that is a Manufacturer Authorized Reseller. We are accredited by the Better Business Bureau, Accreditation Commission for Health Care (ACHC), and are an Authorized Reseller of CAIRE, Philips Respironics, Inogen, Invacare, SeQual, ResMed and more.

Please visit our Accreditation page to learn more.

  Product Manuals

Product manuals are available for you to download. If you are unable to find the information you need, please call customer service at 877.774.9271. You can download the Acrobat Reader on Adobe's website to view the manuals.

Please visit our Product Manual page to view and download concentrator manuals.


We ship to all 50 states and some international locations. Our primary shipping partner is United Parcel Service, and our standard shipping method is UPS Ground. Shipments originate from our Centennial, CO location and typical delivery within the continental United States is 1 to 5 business days. Additionally, we offer 2 Day and Next Day Shipping options.

Please visit our Shipping Information page to learn about our different shipping options and delivery times.

  Warranties and Repairs

Warranties: All warranty repairs and services is provided by the manufacturer of the product purchased. Please contact the manufacturer of the product for warranty questions. If you have additional questions about warranties, please call us at 1-877-774-9271.

Repairs: We have highly trained repair technicians that will diagnose the problem, repair it and test the concentrator to ensure it is working properly and exceeds OEM standards.

Please visit our Repair Information page to learn about our different shipping options and delivery times.

Oxygen Concentrator Store Support

Need Assistance or Have a Question?

Please call 1-855-451-2262 or submit a message to contact the Customer Support Team.

Download our Oxygen Therapy Kit

Educate yourself with our Oxygen Therapy Info Kit. It's easy and free. Complete the fields below to download the kit or click the button below to have it sent to your address.