Is nitrous oxide and other medical gas sold to a dentist exempt from Texas sales tax the same way it is when sold to a hospital?

Plain-English summary

A company selling medical and industrial gases and welding supplies knew that selling medical gases to a hospital is exempt from Texas sales tax, but was unsure whether the same exemption applied to sales made to a dentist rather than a hospital or physician.

The Comptroller confirmed the exemption does extend to dentists. Citing its own prior taxability letters, the Comptroller explained that it treats dentists as being in the same category as doctors — both are licensed practitioners of the healing arts. Because of that equivalence, nitrous oxide and other medical gases sold to a dentist qualify as exempt sales under Tax Code § 151.313 and Rule 3.284, the same as sales to hospitals or physicians.

What this means for you

Medical and industrial gas suppliers

You can sell nitrous oxide and similar medical gases to dentists tax-exempt on the same basis as sales to hospitals and physicians — dentists count as licensed healing-arts practitioners for this exemption, not as a separate, less-favored category.

Dentists and dental practices

Confirm with your gas supplier that they're applying the medical exemption to your purchases of nitrous oxide and other medical gases; you shouldn't be paying sales tax on these purchases given this ruling.

Accountants and tax professionals

This letter is a useful, simply-stated precedent for the "dentist = doctor" equivalence under Texas's healing-arts medical exemption (§ 151.313, Rule 3.284) — helpful for any similar medical-supply taxability question involving dental practices specifically.

Common questions

Q: Is the medical gas exemption limited to sales to hospitals and physicians?
A: No — per this ruling, dentists are treated the same as doctors as licensed practitioners of the healing arts, so sales of medical gases to dentists qualify for the same exemption.

Q: Does this exemption cover industrial gases too?
A: No — this letter addresses medical gases like nitrous oxide used in healing-arts practice, not general industrial gas sales, which are a separate taxability question.

Q: Can another medical gas supplier rely on this letter?
A: No. It answers this specific taxpayer's question; a supplier should independently confirm the exemption applies to its own sales, though the underlying "dentist = doctor" reasoning is stated generally.

Citations and references

Statutes and rules:

• Tex. Tax Code § 151.313 (Medical Exemptions)
• 34 Tex. Admin. Code Rule 3.284 (Drugs, Medicines, Medical Equipment, and 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/200106349L

Original ruling text

June 19, 2001

Dear **:

Thank you for your letter of June 15, 2001, regarding the taxability of nitrous
oxide or other medical gases to dentists.

Your company sells medical and industrial gases and welding supplies. You
indicate that you know that the sale of medical gases to a hospital is exempt
from sales tax, but that you are uncertain as to the taxability of those items
if they are sold to a dentist.

In prior taxability letters, this office has treated dentists to be in the same
category as doctors as licensed practitioners of healing arts. As such,
nitrous oxide and other medical gases sold to a dentist qualify as exempt sales
under Texas Tax Code Section 151.313 and Comptroller's Rule 3.284.

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

If you have questions or need more information, I will be glad to help you. You
may call me toll free from anywhere in the United States at 1-800-531-5441,
Extension 3-4502.

Sincerely,

Gilbert Zamora
Sales Tax Policy