HCPCS Codes for Oxygen Concentrators and Oxygen Equipment

HCPCS Codes for Oxygen Concentrators

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Medical bills contain medical billing codes, which are associated with each service or piece of medical equipment provided with your care. Every year, insurers process over five billion claims to receive payment for equipment and services so that medical providers, healthcare facilities, hospitals, and medical supply companies receive their payments. Medical billing codes help ensure minimal errors, allowing claims to process smoothly and efficiently.

The ICD-11 database contains about 55,000 codes, including virtually every disease, injury, and treatment. The United States healthcare system uses three types of codes:

  • International Classification of Disease (ICD)
  • Current Procedure Terminology (CPT)
  • Healthcare Common Procedure Coding System (HCPCS)

What Are HCPCS Billing Codes?

Medicare, Medicaid, and other insurance companies use the Healthcare Common Procedure Coding System, or HCPCS codes, to identify a medical supply or service for payment.

The codes, developed by the Centers for Medicaid and Medicare Services (CMS), are Category II procedure codes. HCPCS codes remain separate from CPT codes, which are Category I codes since prescribed oxygen is a relatively newer treatment. Category I codes include ambulance services, durable medical equipment (DME), prosthetics, orthotics, and other supplies used outside a healthcare facility.

Billing codes are composed of five letters and numbers, usually beginning with a letter. These alpha-numeric codes replace writing down the names of these services, procedures, and equipment, making it much easier to bill a medical service or supply; shorter descriptions reduce the chance for error.

All HCPCS codes fall under categories to quickly identify and locate each code.
At the Oxygen Concentrator Store, our products fall under these categories: Positive Airway Pressure and Oxygen Therapy Devices.

What are HCPCS Billing Codes for Oxygen Concentrators?

HCPCS billing codes for oxygen concentrators depend on whether it’s a rental and how much oxygen the concentrator can deliver. It’s also important to note that codes could change yearly.

  • As of June 2023, the code for a rental portable oxygen concentrator (POC) is E1392.
  • The current code for an oxygen concentrator with a single delivery port, capable of delivering 85% or greater oxygen concentration at the prescribed flow rate, is E1390.
  • The code for an oxygen concentrator with a dual delivery port, capable of delivering 85% or greater oxygen concentration at the prescribed flow rate, is E1391.

There’s much more that goes into a product’s code. HCPCS codes are specific to the type of equipment and affect the cost, so it’s vital to correctly identify and bill your product.

It’s the responsibility of your medical facility, insurance company, and medical supplier to ensure accurate billing of your oxygen equipment.

Tips for Reading Your Medical Bill

Although reading and understanding medical codes is complicated, you can take steps to ensure you’re not receiving unnecessary charges.

  • Get an itemized statement of your charges.
  • Check your bill to ensure your name, address, and insurance information are correct.
  • If a charge seems “off,” look up the associated medical billing code to ensure it’s correct; Sometimes, typos can cost you more money.
  • Double-check for duplicate charges and treatments or medications you never received.

Updated: June 12, 2023
Published: January 30, 2014

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Scott joined American Medical Sales and Rentals in 2008 as a Web Manager and Content Writer. He is a writer and designer. He is extensively trained on oxygen therapy products from leading manufacturers such as Inogen, Respironics, Chart, Invacare, ResMed and more.

Scott works closely with respiratory therapists and oxygen specialists to educate the community about oxygen therapy products, COPD, asthma and lung diseases. He writes weekly columns and is passionate about educating the community on oxygen therapy and respiratory issues.

About Scott Ridl:

Scott joined American Medical Sales and Rentals in 2008 as a Web Manager and Content Writer. He is a writer and designer. He is extensively trained on oxygen therapy products from leading manufacturers such as Inogen, Respironics, Chart, Invacare, ResMed and more. Scott works closely with respiratory therapists and oxygen specialists to educate the community about oxygen therapy products, COPD, asthma and lung diseases. He writes weekly columns and is passionate about educating the community on oxygen therapy and respiratory issues.

16 thoughts on “HCPCS Codes for Oxygen Concentrators

  1. I bought a portable Oxygen concentator from Inogen. Insurance said the place of service wasn’t correct. But, after reading your information, I see that my CPT code was wrong. Thank you .
    If you have any info about where I should put Inogen information–which place of service do I record it at?
    I’d sure appreciate it.
    Thank you.

    • We recommend that you contact the company or provider where you purchased the machine from. They will be able to give you the best guidance for your insurance company.

  2. I’m still having trouble with this claim. They say my code of E0433 is incorrect. I have an Inogen portable concentrator that has 5 levels. I bought this on my own, costing $2,999.00. Which code is correct? I have called Inogen and they won’t help me.

    • Hi Terri, did you ever get reimbursed for your Inogen portable concentrator? If so, would you mind telling me how you did it? I’m having the same problem with Inogen not helping. My claim denied twice this year (2021)!

  3. Hello Terri

    Did you have any luck getting it covered? My insurance is looking for a procedure code – a cpt code – is that also nabailanle?
    I haven’t had mine authorized yet

  4. Hi I am new to the oxygen billing but i have 15 years of dme billing knowledge. When my providers sends the billing for the oxygen patients they submit the HCPCS and the required modifiers so they would look something like this: E0431 RR KX and E1390 RR KX. Medicare pays for 36mths of oxygen then they are required to maintain or service the equipment if you choose to purchase or keep the device. They pay for rentals only and its very rare when they reimburse for a purchase. Terri Goodheart Try E0431 You will not be reimbursed the complete $2999. 00 or maybe. They pay about 65/mth for a rental here in california oxygen portable concentrator

  5. I purchased an oxygen concentrator out of pocket and submitted the claim to my insurance. I used the code E1390. My insurance is saying they need a modifier code for purchasing it. Does anyone know what that code is?

    • I’m having the same problem, after looking through these web sites I believe the modifier is NU for the purchase of a new device. That’s what I will be trying I also had the same problem with Iinogen with not providing codes . Before I bought I asked for a super bill to be generated that’s what my insurance said I should get from them. After it came and I sent the bill in for reimbursement I was told that it wasn’t the correct bill type. The super bills have all the codes you need attached, when I called to get it corrected Inogen changed their tune and refused my second request stating that they don’t have to do that for private paying customers, even though they must have a RX from your doctor with the diagnosis codes and flow rates on them

      • Our Oxygen Specialists would be happy to understand your requirements and advise the way forward. Please give us a call at (877) 644-4581.

  6. My friend has very weak lungs and was given the pull around can because his pulmonary dr he didn’t quilfy for thr inogen or one like that I billed meducare for years. I knew he did so I started looking for the codes and have to say it’s has me a bit confused can you give me all the codes needed to bill for his inogen and the oxygen.

  7. I purchased a portable oxygen concentrator and have submitted a claim to UHC. They are telling me that the CPT code (E1392) I submitted was for a rental and not purchase. I can not find a purchase CPT code anywhere. I called and asked the company that we bought it from and they couldn’t find one either. Does anyone know what code to use for a purchase?
    Thank you,
    Chip

  8. I am looking for the cpt code specifically for Inogen. My mom was authorized for a portable unit with 30 minute tanks. This is not practical when just yesterday we used 3 tanks for a dr visit. Thank you for any assistance you can provide.

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