United States | 12 Jun 2026 "I bought the lifetime service/warranty add on in February of 2025 and decided to send it in for service 16 months later as the unit has been great, but it had a vibration and noise that started to concern me, so I called and spoke to Josh Baker who was fantastic and very professional. He explained the process and had all my account information and had sent the information to return the unit for service and said they would return it to me within 24 hours after they received it and serviced the unit to like new condition. He answered all of my questions easily and professionally. It reassures me that I picked the correct company to purchase my portable oxygen concentrator from. Thank you, Josh! Thank you, Main Clinic Supply! Rusty Kilkenny" read more

"Jason Pflug is amazing, quick & thorough." I've have returned to Main Clinic several times since buying my first Inogen 5, now I'm onto the newest portable. Service is great when needed. read more

"I had a very good experience purchasing a Zen-O Portable Oxygen Concentrator via telephone on 9-1-26. This included purchasing the extended warranty. The unit arrived on 9-2-26 and was well-packaged and included all the various parts. I read the manual and used it that night and it worked great. I wanted clarification about a few points that were mentioned in the manual (draining the battery, patient filter). So, on 9-3-26, I called the Customer Service number and reached Ricky Gardea. He provided excellent customer service! He was very knowledgeable, patient, and explained things very well. He encouraged me to call or email any time I had questions. Post-purchase support is extremely important to me, so I wanted to let you know what an asset Ricky is to your company, and how he has increased my confidence in using and recommending your product." read more

I have a lifetime warranty for my inogen g4. I called to get my annual check up because it was reading "replace cylinders". I thought I would get a machine, AI or maybe someone would pick up after a dozen rings. Instead, Josh picked up immediately! An actual human being. So refreshing!! Josh was knowledgeable, professional and very friendly. He new exactly what I needed and told me each step, ensuring that I understood the process. I know my device ins in good hands at Main clinic. I have referred this business to many people, even strangers in doctors offices that were struggling with outdated heavy tanks or temperamental portable oxygen devices . You guys are fast, reliable and have never let me down!" read more

Ricky Gardea is always quick to respond and help me with my machine maintenance issues. He has been super helpful getting me replacements in a timely manner with label and instructions to send in the machine needing repair. I have been working with them for ten plus years and have always received excellent customer service! I highly recommend Main Clinic Supply for your oxygen needs! read more

Jason Pflug was very knowledgeable and helpful. He educated me on my options, helped me pick the best unit to meet my needs and took extra time to speak with an engineer to make sure I would be able to provide proper voltage to the cigarette lighter adapter (I have a 24 volt system and need a reducer). read more

"I couldn't be happier that I discovered Main Clinic Supply! Josh got a new concentrator to me in less than 24 hours, which is a huge relief. Without it I couldn't move further than the kitchen or bathroom, couldn't make meals, was constantly concerned about running out of breath. Josh is a wonderful communicator, returns calls and emails promptly, and most importantly, I can tell that he genuinely has my best interests in mind. I used to hire and train reps for companies big and small, and Josh is definitely one of the best. Thanks Main Clinic Supply!" read more

I bought my mom a G5 model mobile oxygen tank in November 2025 for $1,899. Unfortunately she passed away Mach 3, 2026. Not even a year. The sell back price is only $600. These companies knows how to to rob in your time of need. read more

"Jason Pflug handled my order in an excellent manner. He contacted me within a couple of hours and advised that I needed additional documentation for the oxygen concentrator I purchased. As soon as I provided the the necessary documentation; the product was shipped that day and arrived as scheduled." read more

"Kaden did a terrific job answering all my questions and when I bought the Inogen Rove 6 from him, I was 100% sure I had made the right choice with the right company. As an added plus as a veteran, I learned that they partner with Honor Flight. Thank you." read more

I had decided the Inogen One G4 was the ideal concentrator for me due to its small size and light weight. My Dr. had prescribed a flow rate of 1L and I require oxygen for exertion. Inogen has discontinued the G4. Although they still service them, they do not sell the G4. I called several vendors who would only sell used G4. When I called Main Clinic Supply, Leo offered the help I sought. He had NEW G4 at a good price. Delivery would be overnight Fed Ex included. He offered 5 year Drop Coverage which sounded good as I have balance issues. I ordered the G4 and sent Leo my RX. It arrived within 24 hours! I have since learned drop coverage includes annual filter replacement. I have since ordered the G4 Hip Bag from Main Clinic Supply which arrived within 2 days. It is well built, has 2 pockets, and unlike a backpack with shoulder straps offers access to the concentrator while wearing. 5 Stars for Main Clinic Supply! read more

I cannot say enough good things about this Dme company! We purchased a oxygen concentrator a couple of years ago. The unit began to be faulty. They walked us through each step helped us along the way and when the repair didn't work sent a brand new unit. They made it easy and we're pleasant to speak to you on the phone. And their prices are good too! read more

My girlfriend purchased a G5 unit and it broke ..this company sold her a replacement for $975 dollars, a refurbished model with a life time warranty. After a short time she received a call from Main Clinic supply asking for her broken model to be sent back. This was never discussed when she agreed to the replacement!! Ever. It had been disposed of because it was in pieces and now her warranty is null and void on the replacement. But for another $975 when can get it back!!!! Liars and scammers!! This model is defunct now anyway. Buyer beware. read more

"I had previously purchased an Inogen One G5 and was very pleased with the product as well as the service when I needed it. That was the reason when I needed a home concentrator I went straight to Main Clinic Supply. Leo Castro helped me with both purchases. I was very impressed with his knowledge and how courteous he was while dealing with me." read more

My wife needs an oxygen concentrator 24/7 and I love dealing with Main Clinic Supply. They take the time to answer any questions i have, their service is incredible with free next day Fed Ex delivery on the concentrator and all supplies i've needed. When the concentrator needed service, they provided a free next day Fed Ex label to me. There are cheaper places you can order from, but I didn't want to mess around with a lesser known supplier with her needed oxygen. These guys will not let you down. read more

"I was very happy with all the help I received from Ben. He kept in contact and the process went by fast. I received my portable oxygen concentrator this morning and am very pleased." read more

Ben was/is amazing! He showed such care and was very easy to work with and made my experience much less stressful. Because of some issues on our end Ben worked really hard to get us what we needed. The unit came as promised and he checked up on us after it arrived. Thank you Ben! read more

Regis MD - United States | 21 Jul 2024 "The whole process of learning about and ordering the Inogen Rove 6 was a breeze. Dylan and Leo answered all my questions without hesitations made suggestions including warranty packages and accessories. For example, the backpack, which is perfect for me as I play sports w/oxygen and my work, requires both hands/arms to be free. There was no pressure at all from Leo and Dylan regarding accessories and warranties. I stated what I wanted, end of story!" read more

Kevin N HI - United States | 25 Jan 2023 When I found out my mom needed an oxygen machine, I looked online and came across this company's site. I ordered a unit in hopes I could get it to her within a day. It was Saturday morning and we live all the way in Hawaii. I get a call back from Dylan and says in order to get the machine we needed a doctor's prescription. I asked the hospice nurse to fax it to Dylan and he calls back saying it's approved and he can get it on the FedEx truck on Saturday to be in Hawaii by Monday afternoon. I followed the tracking from FedEx and got my mom's unit as promised on Monday afternoon. I'm so grateful to Dylan for all his help. read more

My health issues dictated I consider purchase of a portable, battery operated oxygen device! After looking for the brand and model I wanted on the web (Inogen G5), I found Main Clinic Supply! They stocked the device and offered a very competitive price!!! After further investigation on Better Business Bureau, I found their reviews recommended them as a good source for making this purchase!!! I purchased the device, which required a doctors prescription! I forwarded the doctor's prescription and received the device by 2 day express shipping! They followed up with email and phone call to verify receipt of device and see if I had any questions! Very pleased with my purchase and their customer service!!! read more

Leo helped me and my brother find what we needed for my mom's Inogen POC. He was extremely helpful and responded very quickly from the start and throughout the entire process. He made the process simple and stress-free! We appreciate the fast shipping too! Literally arrived the next day! I'm so glad we found Main Clinic Supply and have no doubt that we will receive great customer service in the future! Thank you! read more

I have previously purchased oxygen supplies and warranty coverage from Main Clinic Supply and have been pleased. When I needed a new home concentrator, MCS was my obvious choice. Leo made the process simple, speedy and pleasant - even adjusting shipping to fit my schedule. P.S. Leo even followed up to provide information I needed to file a DME claim. Can't ask for better service. read more

"When my doctor told me I needed oxygen I really didn't want to handle those heavy-assed butt-ugly green bottles around. So I did a lotta shopping around over a week before deciding on the Inogen 6 from Main Clinic Supply. The buying experience was a NO pressure pleasure. I did decide on the Gold package because of the extras. AND... if you can swing buying the total package you'll get some very attractive extras. I urge you to do that!! By the way.... Delivery was unreal!!! The FedX guy was beating on our door at 8:30 am the next morning. Dick Starks, Kansas City" read more

Barbara and Tom SD - United States | 19 Aug 2021 "We could not be more satisfied with the service given to us by Leo Castro. The information, follow-up, and the personal service was outstanding. This order was made more difficult for us living fulltime in an RV in a state we were unfamiliar with and our doctor in another state. Leo worked with us and made the sale happen. Cudos to Leo." Recommend this Company 5.0Would Buy Again 5.0Price 5.0Product Satisfaction 5.0Delivery Time 5.0 read more

Hello Mr. Fox. I wanted to take a minute of your time to share an experience I recently had with your company. I had been doing research for over a week trying to figure out which portable oxygen concentrator (and from which company) to choose for my 93 year old mother. I live in Salt Lake City and my mother lives alone (thus far) in Houston. I spoke directly with Inogen's sales team and was not impressed with their customer service or even knowledge of their products. I also then found that various social media platforms had honed in on my searches and started supplying me with solicitations from other companies. After talking to several of these suppliers I was, to be honest, a little discouraged by what appeared to be a pretty sleazy feeling industry. Fortunately, I made one more call and was lucky enough to get in touch with Courtney and Main Clinic Supply. Very quickly I realized I had reached someone who knew her business and products, cared about customer satisfaction and worked for a reputable company. Courtney spent a lot of time with me on the phone - pleasantly answering all of my many questions and helping me anticipate things I had not even considered. It was a cumbersome process as I was doing all of the leg work for my mother and had to keep her in the loop along the decision journey - yet Courtney patiently and with a smile in her voice - hung in there with us. Taking advantage of Courtney's expertise and guidance we ended up purchasing an Inogen G5. The order and delivery process were a bit complicated with me ordering, shipping to mom (and working around her concerns), dealing with the Christmas holiday and an Arctic front that played havoc with the delivery schedule. Through all of this, and way too many emails and calls from me, Courtney provided excellent follow-up and information - even while home sick. Since the delivery, I have had to follow-up with Courtney with a few questions/issues - and, once again, she was a pleasure to work with. So, to close - I want to tell you that your company, Main Clinic Supply, certainly stood out from my contact with probably 4-5 of your competitors. Your company's pricing, policies and customer service focus are evident - and I would suspect greatly influenced from the top. And, as I believe I have mentioned (insert smiley face thingy here), you have a great asset in Courtney. She was an absolute pleasure, from all angles, to deal with and I consider myself fortunate that she answered our initial call. Will quit now - went a little longer than I intended - but wanted to make sure you know how much we appreciate your company and also what a gem you have in Courtney. Norm read more

Dylan was awesome every step of the way! Friendly, efficient and knowledgeable.

Main Clinic Supply was very easy to do business with. I asked for a quote on their website and Leo sent me quotes that I was very happy with. I called to discuss the differences in warranties that were offered, placed my order, gave my Dr.'s Name and number and pooph! My unit was delivered next day." read more

I have an Inogen oxygen concentrator It had a fatal error and I either had to buy a new one or have mine repaired I can't say enough about the customer service I was given by Trei at Main Clinic Supply They totally rebuilt my machine and got it back to me in less than a week I'm would gladly recommend them read more

When buying medical equipment it pays to shop around. Compare prices most importantly look at the product and read everything all the fine print. After looking at a lot of sites it took me days. I found Main Clinic Supplies I'm very glad I did. They had the exact model that my aunt was looking for. I contacted Courtney she was outstanding to work with. With less then a week my Aunt had her Inogen Portable oxygen tank. Thank you Courtney Written by my Aunt "I got my inogen very fast. Courtney was great. I love my new machine and able to do so much more than I could. I walked around a store and to another store, last week I couldn't do that. Inogen was very professional and good to me. Thank you for such a great machine." read more

The product was on sale at the start of the year. Purchased online without being aware I needed a prescription to buy. Sales forced contacted me, took my Phsician's information and did 100% of the leg work to get the transaction completed. The concentrator showed up in good condition and on time as promised. read more

Rachel was very quick to get us a quote. We couldn't pass up their exceptional prices, and overnight shipping was the best. Everything was as promised and the equipment is extraordinary. read more

Antonina NY - United States | 13 Mar 2020 "First, I would like to thank Leo for taking the time and answering all my questions with knowledgeable answers. Second, I received a call from Leo after my doctors office sent my script in to let me know he was processing the order. If most companies had this level of customer service available, there would be far fewer complaints. Thank you Main Clinic Supply for giving me back my freedom at such an affordable price. I will definitely be recommending you to anyone who asks." read more

Leo Castro was wonderful to deal with. I had done my research and decided on the Inogen G5, so I was comparison shopping. Leo went right to my questions on price and features. He was very businesslike. Following our conversation, he sent me a quote. I found his approach refreshing because the other vendors I called had wanted to talk about my condition and get a lot of information about me before talking about price and features. The device arrived the next day, the user manual was good, and I did not need the Helpline. Thank you, Leo. read more

"Great customer service ! Great price! Would highly recommend this company and a specially Kyle Sill."

purchased a Inogen G3 about 4 years ago. Had life time warranty ( I purchase for large additional premium ) and supposed to be 24/7 service. Was now told they only work Monday thru Friday. I needed it for the weekend and because I was 30 minutes late I can't even talked to someone to try to fix it myself. Shouldn't sell a warranty with 24/7 service and then change company policy and people our out of luck for 3-4 days. read more

Carlene A AZ - United States | 31 Aug 2021 "Main Clinic Supply is the only company I use. Whatever I need they are always there for me. Courteous, helpful, great tech support; just an absolute pleasure to work with." read more

I would never do business with this company again. I purchased the portable One G5 and an Inogen home concentrator. I purchased these on December 5th, My mom passed away on December 30. We used the portable concentrator two times. Both times were when my mom was returning from a hospital stay. We used the home concentrator for a total of 13 days. Upon my mom's death I called to make sure I could return the items because I was in the 30 day return window. They said yes and that the restocking fee would be between 4 and 15 percent. I was charged the 15 % fee. I was told that the home concentrator was dropped. I can 100% assure that the concentrator was not dropped. It was returned in the same packing they used to send it to me. I was also told the 15% was based upon how long it took them to receive it. It was mailed on January 5th and they received it January 12th. I paid well over $100 in shipping, but could not control the shipping speed. I'm certain these machines probably have a usage counter on them where they could have checked the hours of usage. That would be a much better way to determine usage. The 15% return fee was totally unreasonable and they lied about the system being dropped. read more

"This was an easy purchase. The website was great and Rachel was very helpful! I am very satisfied."

Leo is AWESOME! He is friendly and knowledgeable; also very easy to talk to. He answered all my questions, sent over the information I asked for, and dealt with getting my prescription from my doctor ( not an easy task ). Something that I really appreciate is that he didn't try and "hard sell" me like several of the other suppliers did. read more

"Did all the work for me. Called my doctor, got the prescription and delivered the inogen 4 within 2 days of first calling. Quick, easy, and very pleasant to communicate with." read more