Is an anesthesia ventilator exempt from Texas sales tax as a prosthetic device, even though the anesthesia machine it plugs into is taxable?

Subject

Anesthesia Machine Vs Anesthesia Ventilator

Plain-English summary

A taxpayer asked the Comptroller how Texas sales tax treats "anesthesia ventilators" — the equipment that mechanically pushes oxygen into a patient's lungs during surgery when the patient can't breathe on their own under anesthesia. The ventilators come in two forms: built into an anesthesia machine and sold as part of a complete anesthesia system, or as a stand-alone module that attaches to an existing anesthesia machine. Either way, they're used only for anesthesia and for no other procedure.

The Comptroller ruled that the ventilators qualify as exempt prosthetic devices under Rule 3.284, because they take over a bodily function (breathing) the patient can't perform unassisted while under anesthesia.

The anesthesia machine itself, however, is taxable. That creates a wrinkle when the ventilator is built into the machine and sold as one system: the whole charge stays taxable unless the ventilator's cost is 50% or more of the total system cost — in which case the exemption can cover the whole purchase. The ruling also confirms that repair and maintenance work performed on an exempt ventilator is likewise exempt from tax.

What this means for you

Hospitals, surgical centers, and medical equipment buyers

If you're buying an anesthesia ventilator on its own (a stand-alone unit added to an existing machine), it should be exempt from Texas sales tax as a prosthetic device. If you're buying a complete anesthesia system where the ventilator is built in, ask the seller to itemize the ventilator's cost against the total system cost — if the ventilator is 50% or more of the price, the whole purchase can be tax-exempt.

Medical equipment sellers

When invoicing anesthesia systems, keep records of the cost breakdown between the taxable anesthesia machine and the exempt ventilator component. That breakdown is what determines whether the customer owes tax on the full purchase price or none of it.

Service and repair providers

Repairs and maintenance performed on a ventilator that qualifies as an exempt prosthetic device are themselves exempt from Texas sales tax — you don't need to charge tax on that labor or on parts used in the repair of the ventilator.

Common questions

Q: Why is the ventilator exempt but the anesthesia machine is not?
A: Rule 3.284 exempts devices that replace or substitute for a bodily function or part. The ventilator takes over the patient's breathing during surgery, which qualifies it as a prosthetic device. The anesthesia machine as a whole doesn't perform that same substitute-body-function role, so it's taxed as ordinary medical equipment.

Q: If I buy a combined anesthesia system, how do I know if it's taxable?
A: Compare the ventilator's cost to the total system cost. If the ventilator makes up 50% or more of the total price, the entire charge is exempt. If it's less than 50%, the entire charge is taxable.

Q: Is a stand-alone ventilator that attaches to an existing anesthesia machine treated differently from a built-in one?
A: No — both models qualify as exempt prosthetic devices under this ruling. The 50%-of-cost test only comes into play when the ventilator is sold bundled into a complete anesthesia system as a single charge.

Q: Are repairs to the ventilator taxable?
A: No. The ruling states that repairs and maintenance performed on the (exempt) ventilators are also exempt.

Q: Can I rely on this letter for my own purchase or sale?
A: Only the original requester can rely on this specific letter as a detrimental-reliance defense. It's useful as an illustration of the Comptroller's reasoning on prosthetic-device equipment, but if your facts differ, you should confirm treatment with a licensed Texas tax professional or seek your own ruling.

Citations and references

• 34 Tex. Admin. Code Rule 3.284 (prosthetic devices)

Source

• STAR search: https://star.comptroller.texas.gov/search?doc_type_code=L&tax_type_code=SST
• Opinion: https://star.comptroller.texas.gov/view/9207261L

Original ruling text

July 23, 1992

Dear **:

Thank you for your recent letter asking about the taxability of "anesthesia
ventilators."

You stated that the anesthesia ventilators push oxygen through patient's lungs
during surgery to mechanically inflate the lungs. You stated that the patient
is incapable of breathing on their own and the ventilators provide this
function during surgery. The ventilators are modules that are added to an
anesthesia system.

You indicated that there are two different types of ventilators. One model is
built into anesthesia machines and sold as an anesthesia system while the other
model is a stand-alone unit which can be used with or attached to existing
anesthesia machines. Both models are specifically "anesthesia" ventilators and
cannot be used for any other procedures; however, without assistance from the
ventilator while the patient is under anesthesia, the patient could not breath
on their own.

Question: Are the ventilators considered prosthetic devices under Rule 3.284?

Response: The ventilators will qualify for exemption as prosthetic devices
under Rule 3.284.

Anesthesia machines are taxable. When the ventilator is built into the
anesthesia machine, the total charge will be taxable unless the cost of the
ventilator constitutes 50% or more of the cost of the anesthesia system.

Question: If the ventilators are non-taxable, are the repairs and maintenance
performed on the ventilators also exempt?

Response: Yes.

This opinion is based on the facts presented. If there are additional or
different facts, the opinion may change.

If you have any questions or need more information, you may call me toll free
at 1-800-252-5555, extension 3-4633. The regular number is 512/463-4633. You
may also write to the Tax Administration Division.

Sincerely,

Wanda Hutcheson
Tax Administration Division