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What is the best way to obtain a long-term stay visa for Thailand as a tourist returning for dental work?

Thai visa rules tourist visa NON-O visa visa extension Thailand immigration dental tourism long-term stay visa

Oct 30, 2025

a day ago

Martin ********

ORIGINAL POSTER

Can anyone confirm if I have this right..

I returned to uk in August this year after 7 weeks in Thailand. 

I'm returning in January for 4 months. 

I'm a tourist and finishing off dental work there that I started earlier this year.

Do I get 90 day visa then go to the local  immigration office and extend one month ? 

If not, What's the best,/correct way to do this.  

Thank-you in advance.

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TLDR : Answer Summary

The user plans to stay in Thailand for 4 months to complete dental work after previously visiting. They inquire about the correct visa procedure, asking about obtaining a 90-day visa and the possibility of extending it. Commenters clarify that a 90-day NON-immigrant visa is not the same as a tourist visa, and they suggest considering a NON-O visa for a longer stay. They also discuss the implications of visa extensions and alternatives for longer stays without complications.

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Cris ******

a day ago

Graham ******

I take it you do not have Thai Family (wife or child) to qualify for the Visit Thai Family 60 day extension?

a day ago

Graeme ******

Suggest if you need to be there for 4 months is apply for a non o over 50 retirement visa which is valid for 90 days then before it expires leave to a local country and then enter again on visa exempt for another 60 days. Having no 30 day extensions gives you a better chance of reentering without local immigration hassle

a day ago

Stuart *********

A 90 day visa is a non immigrant visa. They are only extendable for a year if you meet the requirements.

A tourist visa is valid for 60 days but then so is a free visa exempt entry if your passport qualifies. Both are eligible for a 30 day extension (for most countries).

a day ago

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Stuart *********

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What is the best way to extend my stay in Thailand for three months while continuing dental treatment?

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