Frequently Asked Questions

Author: Jessica Fox

Frequently asked questions icon
At Lincare, we understand that you may have questions about the services you receive. We have answered some questions frequently asked by our patients and their caregivers.
How do I get my equipment picked up?

Please contact your Local Service Center to arrange a pickup.

How do I read my bill?

We understand that when you receive your bill from Lincare you may have questions. View our guide to help you understand the different sections of your bill and billing codes. You can also view our Billing Frequently Asked Questions which includes a list of common questions we receive related to patient bills.

How can I verify the amount of my auto pay? Or recurring payments?

Please call 1-800-284-2006 and press 4 to speak with a representative about this information. Alternatively, you can login to online bill pay here. 

My insurance hasn't received a claim from Lincare yet and I've had my supplies for over a month. Why?

Medicare and other insurance companies require specific documentation from third parties, such as your prescribing practitioner, prior to us billing the claim. Once the required documentation is received, Lincare will submit a claim to your insurance company.

When will I receive my refund check?

It usually takes 7-10 business days to receive your refund check via mail.

Why am I receiving calls from Lincare?

You may receive calls about a past due balance, supply reorder, follow-up by a center after setup, a prescription-related question or even a request for a follow-up from your physician.

All About Oxygen

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What is oxygen therapy?

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Oxygen therapy increases the amount of oxygen your lungs receive and deliver to your blood. Oxygen therapy may be prescribed for you when you have a condition that causes your blood oxygen levels to be too low. Click to learn more about Lincare’s Oxygen Therapy services.

How do I use home oxygen*?

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You can use either an oxygen mask or nasal cannulas to deliver supplemental oxygen to your lungs. An oxygen mask fits over your nose and mouth, while a small, adjustable plastic tube, called a nasal cannula, attaches to your concentrator or tank and facilitates oxygen flow to your lungs. We have provided The Patient's Guide to Oxygen Therapy with more comprehensive information on oxygen treatment. (*Use oxygen as prescribed by your practitioner)

How can I tell if I need supplemental oxygen?

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If breathing becomes more difficult, or you are experiencing fatigue, dizziness, or shortness of breath, you may need supplemental oxygen. Your prescribing practitioner can measure the amount of oxygen in your blood with an Arterial Blood Gas (ABG) test or an oximeter to determine if you need supplemental oxygen therapy. Click to learn more about Signs You May Not Be Getting Enough Oxygen.

How can I tell if I am getting the right amount of oxygen?

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You may experience a decrease in symptoms when using oxygen, but the only way to accurately determine if you are getting the right amount of oxygen is to have the oxygen level in your blood measured while using supplemental oxygen. If new symptoms, such as headaches, confusion, or increased fatigue appear, you may be getting too much oxygen. If your symptoms do not improve, you may not be getting enough oxygen. If you experience any of these symptoms, reach out to your prescribing practitioner to discuss whether a change in your prescribed treatment is needed.

How long will I need to continue my oxygen therapy?

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Some patients may use oxygen at home for years, while others use it temporarily to relieve discomfort, stress, or other underlying reasons. This will differ depending on your medical condition and individual needs, and your practitioner's prescription.

Do I have to use oxygen all the time?

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Your prescribing practitioner will determine how many hours per day you should use oxygen, and you should follow the prescribed routine.

How do I get around my home while using oxygen?

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A variety of equipment options can help meet your individual needs and activities. Equipment is typically placed where it will be used most often, and extension tubing allows you to move more freely.

How heavy are portable tanks?

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The weight of portable tanks vary depending on the size. Smaller tanks weigh approximately 5 pounds and are designed to be carried in a shoulder bag while larger tanks containing more oxygen for longer periods of use are approximately 15 pounds and are pulled on a cart.

Is there anything I can't do while using oxygen?

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You can participate in your usual activities, except for those involving open flames, smoking, or anything that can cause a spark. The use of oxygen may enable you to perform some activities you might otherwise have to avoid.

Can I refill a portable tank myself?

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No. High-pressure tanks should only be refilled by Lincare or an authorized provider.

Can I drive a car or travel while using oxygen?

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Yes, as long as there's no other medical condition prohibiting you from driving a car or traveling. When driving, secure the portable oxygen device so it does not tip or fall. You can also travel on public transportation while using oxygen. Learn more about Flying with your Portable Oxygen Concentrator.

What do I do if I run out of oxygen?

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Call your center to replace or refill the cylinder.

Can I become addicted to oxygen?

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No. Oxygen is not addictive.

Will oxygen relieve my shortness of breath?

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Supplemental oxygen can relieve shortness of breath. However, there may be some conditions that are not relieved by oxygen.

How do I choose a home oxygen supplier once my physician prescribes it?

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When selecting an oxygen supplier, you always have a choice. Find out if your potential supplier will deliver and install your equipment. See how flexible they are with delivery. Find out if they will bill Medicare or your insurance directly, if they provide in-home visits with a nurse or therapist, and whether they offer 24/7 service.

How much does home oxygen cost, and does Medicare or my insurance cover it?

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Home oxygen costs vary depending on prescription needs and the type of equipment. Your supplier can select the most economical system to meet your prescription requirements and estimate the monthly costs.

Can I cook and eat while using oxygen?

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Never cook over an open flame, and make sure your oxygen tubing does not come in contact with anything that could damage or melt the tube's plastic. Using oxygen while eating may reduce the shortness of breath that many patients experience during and after eating.

Can I use electrical appliances while using oxygen?

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Yes, as long as the electrical appliance does not spark during operation.

How can I maintain my oxygen therapy outside of my home?

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Portable tanks allow you to take your oxygen on the go. Some even hold enough oxygen for up to eight hours of continuous use. There are optional refillable tanks that you may be able to utilize for travel; contact your local Lincare Center to see if this is appropriate for you.

Are there any hazards involved in using oxygen?

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Avoid open flames, burning cigarettes, and electrical equipment that can spark during use. Never use oil, grease, or petroleum jelly on your face while using oxygen equipment. If frost forms on the equipment, avoid contact with your skin. Be sure to follow your prescribing practitioner's orders when using oxygen and never change the liter flow without their approval.

All About PAP

Are you looking for answers to commonly asked questions about CPAP? Find everything you need to know about CPAP machines, their benefits, usage maintenance, and more in our comprehensive FAQ guide.

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What is the return policy for PAP supplies?

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You have 60 days to return unopened supplies. Contact our PAP supply department at 888-544-2715 for a return label to mail back the supplies.

Why do I need to replace my supplies?

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To reduce the risk of germ growth in the tubing and mask, it's important to replace disposable supplies regularly and clean them as instructed by the manufacturer. Additionally, changing the filters on your CPAP machine is crucial for its proper functioning. Check out the when to replace your CPAP supplies blog and guide for more information.

Are my supplies dishwasher safe?

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To prevent damage, avoid using dishwashers or washing machines to clean the CPAP device or its components, as most of them are not dishwasher safe. For more information, consult the manufacturer's guidelines.

Can I change the pressure setting on my machine?

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The CPAP pressure is adjusted by our clinical team based on your doctor's provider's prescription.

What is the best brand of soap to clean my supplies with?

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Use distilled water with a mild, fragrance-free soap.

What is Sleep Apnea?

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Sleep Apnea can be a common sleep disorder. It causes you to stop and start breathing during sleep repeatedly. This occurs because your airway becomes partially or completely blocked, which limits the amount of air that reaches your lungs. The loss of air can last for 10 seconds or longer. As a result, a narrow or obstructed airway often vibrates during sleep, causing loud snoring. These episodes may happen multiple times during the night, which could lead to waking up unknowingly for a brief period and restarting the breathing process.

How can I wash the headgear to avoid stretching?

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Wash your headgear in the sink with warm water and mild, fragrance-free soap. Swirl all parts for five minutes, rinse well, and air dry.

Can I apply heat to my supplies to dry them quicker? (e.g., blow dryer, microwave)

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The recommended method for drying your PAP supplies is to air dry them. Applying heat could damage them or decrease their lifespan.

When can I get a new CPAP Machine?

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The frequency at which you can get a new CPAP machine through your insurance can vary depending on your specific insurance policy. In general, Medicare and some other insurance will consider a replacement machine following the five years of reasonable useful lifetime (RUL). It is recommended to check with your insurance provider to understand the specific coverage details and limitations of your policy.

Is my heated tubing safe to use when it’s wet/after it’s been cleaned?

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Allow the heated tubing to air dry after thorough rinsing. Ensure the tubing is dry before use.

Why do I have condensation in my tubing? How can I prevent that?

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This is called CPAP rainout. It occurs when the humidified air cools in the tubing and condenses into water droplets that are then pushed into your face and mask by the air blowing through the tubing. Tips to avoid rainout:


  1. Adjust your humidifier setting down
  2. Adjust bedroom temperature
  3. Use Heated CPAP tubing

Should I use special water in my humidifier?

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You should always use distilled water in your humidifier to prevent the buildup of mineral deposits on your water chamber. This will significantly prolong its life.

What is the difference between a CPAP, APAP, and BiPAP?

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  1. CPAP – Continuous Positive Airway Pressure – Single fixed pressure for a continuous pressure flow.
  2. APAP – Auto-Titrating Positive Airway Pressure – This device is set within a range of pressure (usually 4-20 cm H2O) and monitors changes in breathing, then automatically adjusts pressure to compensate for the pauses in breath.
  3. Bilevel PAP – Which is sometimes referred to as Bilevel Positive Airway Pressure – Two fixed pressures, one for inhalation, one for exhalation.

What will mold look like on my supplies?

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If you notice black specks, a sudden foul odor, or discoloration on your CPAP machine, it may indicate the presence of mold. The humidifier is the most likely area for mold growth to occur. Additionally, if you see an accumulation of dirt and debris, it's also important to clean your device thoroughly to prevent any potential mold growth. Check out our cleaning blog and guide for more information on how to clean your CPAP Supplies properly.

I keep getting air leaks with my masks. What should I do?

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It's important to avoid over-tightening your headgear when using a mask, as this can lead to leaks and discomfort. Tightening the top straps excessively can cause leaks around the mouth while tightening the bottom straps too much can result in the air blowing into the eyes. To prevent leaks, simply loosen the headgear and gradually tighten the straps until the leak stops. Keep in mind that worn-out masks or mask parts may also be a cause of leaks, so they may need to be replaced. If adjusting headgear does not alleviate the leak, contact your local center to request a mask refit.

What type of power does my CPAP require?

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Many CPAP machines are versatile and can run on both AC and DC battery currents. In the US, wall outlets provide AC current at 110 volts, while most batteries offer 12 volts of DC current. However, when traveling abroad, the AC current is typically 220 or 240 volts. It's always advisable to check the manufacturer's guidelines on how to power your particular model of CPAP machine.

How often should I use my machine?

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To get the most out of your CPAP machine, use it every time you sleep, including naps. Consistent use helps patients adjust to the therapy more quickly.

Why do I wake up with a dry mouth in the morning?

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If you wake up with a dry mouth while using PAP therapy equipment for sleep apnea, it could mean that you unintentionally opened your mouth during the night and allowed the pressure to escape. This can interfere with the effectiveness of your treatment. The dryness you experience is caused by the pressure blowing through your mouth. If you're using a full-face mask, you might need to increase the humidity setting. For those using a nasal mask, a chin strap or switching to a full-face mask may be necessary. If you are experiencing persistent dry mouth, it's a good idea to reach out to your prescriber for further guidance.

What is a “ramp,” and how does it work?

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The ramp feature of the machine can be used to lower the pressure and make it more comfortable while you're awake. As time passes, the pressure will gradually increase to the therapeutic level that has been set to keep your airway open. The amount of pressure reduction is proportional to the pressure at which your machine is set, making it useful if you struggle to fall asleep with the full pressure. The reduced pressure may help you fall asleep more easily.

I want to be able to review my data from my PAP machine. How can I do that?

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You can review your sleep data from your CPAP machine through the manufacturer’s software app. These tools allow you to connect your CPAP machine to your mobile device. You can view various metrics such as the Apnea-hypopnea index (AHI), mask leaks, and usage hours depending on your particular model of CPAP machine.

All About INR Testing

Find answers to frequently asked questions about INR and its importance on monitoring blood thinners to prevent blood clots and bleeding complications. Learn how regular monitoring helps healthcare providers determine dosage adjustments for optimal therapeutic range.

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What are the benefits of PT/INR home testing?

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Home monitoring can mean:


  • Control - better management of your time & care.
  • Convenience - less need for warfarin specific provider's visits
  • Savings - of time and money
  • More Frequent Testing - which may mean a greater chance you are "therapeutic".
  • More Data - so your provider has more information to guide your treatment.
  • Faster Interpretation of Results - abnormal results are reported to your healthcare provider, therefore dosing adjustments may be made faster, possibly preventing complications.

Why do I test my INR weekly?

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Measuring your INR values through an INR test is a simple and efficient way to gain real-time insight into your health. This can help prevent potential health complications caused by your heart condition or blood thinners. Regularly performing this test every week allows your practitioner to monitor your health with ease and accuracy.

How do I report my INR results?

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Results may be reported by:


  • Call the patient customer service line
  • Report results to the local Center
  • Use the mdINR mobile app.

How do I re-order supplies?

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Order supplies by contacting our customer service department at 800-231-2290 or through your mdINR app (Apple / Google).

Why is time in therapeutic Range important for a person taking a blood thinner like Warfarin?

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Monitoring the time spent in the therapeutic range is crucial for individuals taking blood thinners, as it shows how effectively the medication is reducing the risk of the formation of blood clots. Regular monitoring assists healthcare providers in determining whether the blood thinner dosage needs adjustment. Maintaining the appropriate therapeutic range helps reduce the risk of bleed complications while effectively preventing the formation of blood clots.

Is PT/INR self-testing covered by Medicare?

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Effective March 19, 2008, Medicare covers weekly self INR monitoring for patients on long term warfarin therapy for the management of patients with 1) mechanical heart valves, 2) chronic atrial fibrillation and 3) venous thromboembolism (inclusive of deep venous thrombosis and pulmonary embolism).


For eligible beneficiaries, Medicare covers 80% of the service once the annual Medicare deductible has been satisfied. The service includes all necessary testing equipment (meter loan, ongoing supply of test strips and lancets) needed in order to obtain a weekly INR test result. Nothing is billed to Medicare for the service until 4 successful test results have been reported to your supplier and transmitted to the provider for interpretation.


Most secondary or supplemental insurance plans will cover the remaining 20% co-insurance. This is subject to your specific insurance plan/policy.

What is the best way to ensure I get a good blood sample?

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Follow the directions below to ensure you get a good blood sample.


  1. Warm hands prior to pricking the finger
    • Run hands under warm water, or place in a bowl of warm water for 30 seconds
    • Apply a warm towel over the hands for a few minutes
  2. Hold hands below the heart
  3. Massage the area for 30 seconds prior to pricking finger
  4. Insert test strip
  5. Follow manufacturer’s guidelines for generating an INR test result

If you have trouble testing, try to repeat the process once more on a different finger; don’t use the same finger twice. If unsuccessful call our affiliate mdINR at 800-877-4910 option 2.

What are anticoagulants?

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Anticoagulants such as warfarin, commonly known as blood thinners, are chemical substances that prevent or reduce coagulation of blood, prolonging the clotting time.

What is my therapeutic range?

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Your healthcare provider will prescribe a therapeutic INR range that is tailored to your individual needs. For most patients, the recommended range is between 2.0 and 3.0. This range is considered safe and helps to properly anti-coagulate your blood. If your INR falls below this range, you are at risk of developing a clot and potentially experiencing a stroke. Conversely, if your INR rises above the therapeutic range, you may be at risk of internal bleeding. Regular home testing can help to prevent these complications and allow your provider to better manage your warfarin therapy, ensuring that you stay within the safe therapeutic range more frequently.

How can I download the mdINR mobile app?

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Scan the QR Code to download and install the mdINR® mobile app from the Apple iPhone or Google Android app stores.

What is coagulation?

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Coagulations, also known as clotting, is the process by which blood changes from a liquid to a gel, forming a blood clot.

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