Assoc. Prof. Dr. Preecha Tiewtranon

Assoc. Prof. Dr. Preecha Tiewtranon (Thai: ปรีชา เตียวตรานนท์) founded Preecha Aesthetic Institute (PAI) and practises there as a plastic and reconstructive surgeon. The clinic stands at 898/1 Sukhumvit 55 in the Watthana district of Bangkok, across the road from Thonglor Soi 23. On PAI's website his profile names plastic and reconstructive surgery as his specialty, with English and Thai as the languages he works in.

Gender-affirming surgery dominates the documented side of his work. Three of the four special interests PAI records for him concern transgender care: male-to-female genital surgery by penile skin inversion, facial feminization and facial contouring (FFS), and transgender surgical procedures more broadly. The fourth is revision breast surgery. Our site links him to forty procedures, each because a PAI service page names him among the surgeons who carry it out; they range from vaginoplasty and top surgery to rhinoplasty, breast implant revision and tummy tuck. His name is also on published research in the field: PubMed indexes a 2015 paper setting out his own male-to-female vaginoplasty technique and a 2014 paper looking at how sex reassignment surgery in Thailand developed, from a social perspective.

His background also includes academic surgery. His PAI profile records that he was once chairman of Chulalongkorn Hospital Medical School's Plastic Surgery Unit and held an associate professor teaching post at Chulalongkorn University's medical school. He has also led two Thai surgical societies as president, according to the same profile: the plastic and reconstructive surgeons' society (ThPRS) and the aesthetic plastic surgeons' society (ThSAPS). On the committee page of AsiaPATH, the Asian Professional Association for Transgender Health, his title is Immediate Past President.

Clinic and hospital: how surgery is organised. PAI keeps outpatient care and major operations apart. According to the clinic, consultation, pre-operative health checks and follow-up all happen at PAI itself, which has 10 consultation rooms, recovery rooms and theatres used for local-anaesthetic procedures. For operations under general anaesthesia, PAI has two affiliated private hospitals in Bangkok, and the names attached to photos in its hospital gallery are Phyathai 2 Hospital and ViMUT Hospital. So for vaginoplasty, FFS or top surgery with Dr. Preecha, expect to meet him on Sukhumvit 55 and to be admitted to one of those hospitals for the operation itself.

Why his title varies between sources. We follow his current PAI profile and PAI's doctor directory, which both call him Associate Professor. PAI's About page and a ThPRS page on the history of ThSAPS use Assistant Professor instead, and ThPRS and RCST, in their member records, give only the Thai prefix นพ. (Dr.). All of these refer to one surgeon.

When you are ready, you can request a consultation through our booking form for Dr. Preecha Tiewtranon; our patient team forwards the enquiry to PAI and confirms an appointment with you only once the clinic has agreed a date.

Two sources describe Dr. Preecha's training in detail: his profile on PAI's website and his entry on AsiaPATH's committee page. Together they show a Thai medical degree, hospital training in the United States from 1966 until 1973, and then plastic surgery placements in New York State and in Australia.

Medical school. PAI's profile gives his medical degree (M.D.) as from 'Chulalongkorn Medical University' in Bangkok. No graduation year is shown.

Hospital training in the United States, 1966–1973 - 1966–1967: internship at Highland Park General Hospital in Detroit, Michigan (recorded by AsiaPATH) - 1967–1968: surgical residency at New York Hospital, New York - 1968–1970: surgical residency at Providence Hospital in Southfield, Michigan - 1970–1973: surgical residency at Roswell Park Memorial Institute in Buffalo, New York

Fellowship in surgical oncology. After his residency he remained at Roswell Park as a surgical oncology fellow. AsiaPATH's wording adds head and neck surgery to the title of that fellowship.

Plastic surgery. He then trained in plastic surgery, first with Albany Plastic Surgeons Associates in Albany, New York, and afterwards in Australia, at Melbourne's Victorian Plastic Surgery Unit. PAI and AsiaPATH disagree by about a year on the dates of the fellowship and of both plastic surgery placements, so we have not printed years for these three steps.

Board certification listed on his PAI profile - American Board of Surgery, Diplomate, certified 1973 - Certification in general surgery from the Thai Board of General Surgery - Certification in plastic surgery from the Thai Board of Plastic Reconstructive Surgery

A further line on the profile reads 'Certified Plastic and Reconstructive Surgery (USA, Australia, Thailand)'. It names countries but no certifying board, so it is not in our list of credentials.

Checking his licence. When we searched for Dr. Preecha on 27 September 2026, the Thai Medical Council's online register returned an automated bot-check page rather than results, which we did not try to bypass. His ThPRS member entry leaves the licence-number field empty. The Council's register is public, so it is worth trying a name search for Dr. Preecha yourself before you book flights. How we choose and date sources for profiles like this one is explained in our research methodology.

At Chulalongkorn. His PAI profile lists two past university roles. At Chulalongkorn Hospital Medical School he was chairman of the Plastic Surgery Unit; at Chulalongkorn University's medical school he held a teaching appointment as associate professor. PAI's About page refers to him as a former faculty member. Dates for these posts are not published.

Private clinics. According to PAI's About page, Dr. Preecha ran Chollada Clinic, which he had founded, from 1978 to 2002, before establishing the Preecha Aesthetic Institute where he works today. We do not give a founding year for PAI, because the clinic's own website gives more than one.

Society and conference leadership - Past president of ThPRS (source: his PAI profile) - Past president of ThSAPS (source: his PAI profile) - Chair of the organising committee for the First Live SRS (Sex Reassignment Surgery) Workshop, a ThSAPS event held at BNH Hospital, Bangkok, in 2004 (source: the ThSAPS history page on the ThPRS website) - Immediate Past President of AsiaPATH (source: AsiaPATH's committee page). His PAI profile still calls him AsiaPATH's President; we follow the association's own listing.

Professional memberships and where we confirmed them - ThPRS: his name appears on the society's online member list - RCST (Royal College of Surgeons of Thailand): he comes up when the College's online member directory is searched by name - AsiaPATH: listed by name on the committee page - ThSAPS: membership stated on his PAI profile - WPATH (World Professional Association for Transgender Health): stated on his PAI profile, which lists it as HBIGDA (Harry Benjamin International Gender Dysphoria Association), the name WPATH used before - Oriental Society of Aesthetic Surgeons: AsiaPATH's page lists him as national representative

For the last three, we rely on PAI's or AsiaPATH's description rather than on a member list published by the society itself.

Research indexed on PubMed, oldest first - 2004, Journal of the Medical Association of Thailand: 'Sex reassignment surgery in Thailand'. The paper has two authors, and Dr. Preecha is listed second. - 2014, The Scientific World Journal: 'The development of sex reassignment surgery in Thailand: a social perspective' - 2015, Journal of Plastic Surgery and Hand Surgery: 'Male-to-female vaginoplasty: Preecha's surgical technique', describing the method that carries his name - 2018, BioMed Research International: 'Spermatogenesis abnormalities following hormonal therapy in transwomen'

The PubMed records for the 2014, 2015 and 2018 papers give Preecha Aesthetic Institute as the affiliation. On the 2004 paper, the only affiliation printed belongs to the first author, whose department is surgery at Chulalongkorn University's medical faculty.

His PAI profile goes on to list talks and keynote lectures, among them presentations at HBIGDA and WPATH meetings. Conference talks are not indexed publications, so we mention them only in general terms.

Case numbers. Totals of operations attributed to Dr. Preecha appear on PAI's website and in AsiaPATH's biography of him. Because we cannot check these totals independently, they are left out here. When experience with one particular operation is important to you, ask PAI how many he has personally performed and over what period.

Every procedure in this section rests on a PAI service page listing Dr. Preecha among the surgeons who carry it out; we re-read each of those pages on 27 September 2026. Nearly all of those pages list him alongside Dr. Burin Wangjiraniran and Dr. Sutin Khobunsongserm without saying which of the three operates on which patients. His surgical training began in 1966, so it is reasonable to ask PAI which of these operations he currently performs in person. Under each heading we first say what PAI documents for him, followed by general points drawn from our procedure guides and marked *In general*. Your own surgeon's advice always comes first.

Male-to-female genital surgery

His record is fullest here. Among his special interests PAI lists the penile skin inversion (PSI) technique, and PAI's PSI page says the clinic's three named surgeons, Dr. Preecha included, specialise in male-to-female surgery by that method. According to PAI's sigmoid colon page, the clinic's male-to-female sex reassignment operations are now done by Dr. Preecha, Dr. Burin and Dr. Sutin. He also wrote the 2015 journal article, listed in the career section, that describes his technique. PAI offers four vaginoplasty options: - Penile inversion vaginoplasty, which PAI calls penile skin inversion - Penile skin inversion combined with a skin graft taken from the scrotum - Colon (sigmoid) vaginoplasty, using a section of sigmoid colon - Secondary sigmoid colon vaginoplasty, which PAI offers as a revision vaginoplasty when an earlier operation has left too little depth or the canal has closed

Two related operations also carry his name on PAI's pages: zero-depth vaginoplasty, covered on our site as vulvoplasty, and bilateral orchiectomy performed as a standalone operation. Peritoneal vaginoplasty is not among PAI's listed techniques, so if you are considering it, or any method not listed here, raise it with the clinic before you travel.

*In general:* vaginoplasty is a major operation performed with the patient under general anaesthesia. The vaginoplasty guide on our site gives a hospital stay of commonly 5–7 nights and a total of commonly 3–4 weeks in Thailand, during which you learn the dilation routine you will continue at home; ask how long dilation must go on. Vulvoplasty, also called zero-depth vaginoplasty, forms the external genitals without creating a vaginal canal. Under the WPATH Standards of Care (SOC-8), which many surgeons apply, the guidance for genital surgery is a minimum of six months on hormones, unless hormone therapy is clinically unsuitable or is not something you want. Requirements for assessment letters vary, and some surgeons still ask for two. Skin that will line the canal can grow hair, so permanent hair removal is often recommended beforehand; it can take several months, so ask about it early. Every operation carries risks, and whether a technique suits you can only be judged after an individual assessment.

Facial feminization and facial contouring

FFS and facial contouring appear among his special interests, and On the chin shaving page, PAI credits all three of its named surgeons with 'extensive experience' in the field. The FFS operations PAI names him for are: - Brow bossing surgery (see forehead contouring and brow bone reduction) - Lower hairline surgery, covered in our hairline lowering guide - Tracheal shave, which reduces the Adam's apple - Chin shaving, or chin reduction, and jaw contouring - Cheek augmentation, performed under general anaesthesia according to PAI - Chin augmentation

Jaw implants are the exception: PAI's jaw augmentation page names only Dr. Burin and Dr. Sutin, so that operation is not linked to Dr. Preecha on our site.

*In general:* according to our facial feminization surgery guide, FFS normally takes place under general anaesthesia and involves commonly 1–3 nights in hospital. A CT scan is often used to plan any bony changes to the forehead, jaw or chin, and because very long combined operations add risk, some split the work into stages. Allow commonly 10–14 days in Thailand, and more if several areas are treated together. WPATH SOC-8 sets no hormone requirement for facial surgery, although individual surgeons can have their own criteria. Which procedures suit your face is a matter for assessment.

Top surgery for trans men

Chest masculinization appears on the clinic's mastectomy page as one of the operations Dr. Preecha performs with Dr. Burin and Dr. Sutin. The page describes two approaches: keyhole or periareolar surgery for a smaller chest, and double incision with nipple grafts. *In general:* our top surgery guide explains that the operation is done under general anaesthesia, usually followed by a compression binder and often with drains. A stay of commonly 10–14 days in Thailand gives time for drain removal and a nipple graft check before you fly. Under WPATH SOC-8, testosterone is not a prerequisite for chest surgery, but you will usually need an assessment, so ask what documentation PAI wants.

On the metoidioplasty, testicular implant and vaginectomy pages, PAI gives Dr. Preecha an advisory role rather than naming him as an operating surgeon, so we have not linked those operations to him. Phalloplasty is not currently offered at PAI, according to the clinic.

Breast surgery

Revision breast surgery is one of his four special interests. On PAI's Re-Breast Augmentation page the team is described as specialising in revision work, including the correction of complications such as capsular contracture. His name also appears on PAI's pages for breast lift, breast reduction, breast augmentation and male breast reduction, which we list as gynecomastia surgery.

*In general:* breast implants do not last for life, our breast augmentation guide explains, and many people eventually return for surgery to exchange or remove them. Capsular contracture means the scar tissue around an implant tightens. After a first augmentation, overseas patients commonly stay 7–10 days. Keep the implant card from the hospital, which records the implant's brand, size, type and lot number, because any future revision surgeon will want it. PAI's breast implant removal page does not name a surgeon, so explant surgery is not linked to Dr. Preecha here.

Nose surgery

PAI's pages list him for rhinoplasty and nose augmentation with an implant (our Asian rhinoplasty guide covers bridge augmentation), for tip rhinoplasty, which PAI calls tip plasty or tip reduction, and for alar base reduction. PAI's own pages say local anaesthesia is used for both nose augmentation and alar reduction, and the alar reduction page places that operation at the institute itself.

*In general:* our rhinoplasty guide notes that the operation is usually performed under general anaesthesia, with some minor tip work under local anaesthesia and sedation, so confirm which applies to your plan. To raise the bridge, a surgeon may use an implant, for example silicone, or cartilage harvested from your septum, ear or rib; ask what each would mean for your nose. Most overseas patients stay commonly 7–10 days, which covers splint removal and a post-operative review before the flight.

Eyelids and brow

PAI's blepharoplasty page names him for both upper and lower blepharoplasty (upper and lower lids each have their own guide: upper eyelid surgery, lower eyelid surgery), and other PAI pages name him for double eyelid surgery and brow lift. *In general:* eyelid operations in Thailand often use local anaesthesia combined with sedation, and stitches usually come out around days 5–7, which is also when most international patients fly home. Mention any eye conditions, such as glaucoma, dryness, thyroid-related eye disease or reduced vision, since they change the safety picture. Ptosis, where the lid margin itself droops, is corrected by repairing the muscle and is not the same operation; because PAI's blepharoptosis page does not name a surgeon, we have not linked ptosis correction to him.

Facial ageing and ears

Among PAI's facial rejuvenation pages, he is named for facelift and mini facelift, for neck lift and for buccal fat removal, while PAI's ear pinning page names him for otoplasty. *In general:* facelift surgery uses general anaesthesia or sedation, and our guide suggests commonly 1–2 hospital nights and commonly 10–14 days in Thailand overall. Of the significant complications, haematoma is the most common: blood collecting under the skin, which sometimes has to be drained, and smoking raises the chance of poor skin healing, so giving up nicotine well before and after surgery is important.

Body contouring

PAI names him for liposuction, including VASER liposuction (branded on PAI's site as VASER LipoSelection), for tummy tuck and mini tummy tuck, and for arm lift; PAI's arm lift page specifies general anaesthesia. *In general:* after a tummy tuck, international patients commonly stay 12–14 days, and after liposuction commonly 7–10 days. Compared with most cosmetic operations, abdominoplasty has a relatively high risk of blood clots, so ask about clot prevention and walking early, especially before a long flight home.

Labiaplasty

PAI's labia repair page names him for labia reduction, which we describe under labiaplasty, which is cosmetic gynaecology rather than gender-affirming surgery. *In general:* allow commonly 5–7 days in Thailand. Removing too much tissue is hard to put right, so a cautious, well-planned reduction is the sensible approach.

Expect two stages. PAI asks overseas patients to start with an email assessment, in which the attending physician looks over what they have sent; the clinic does not hold video consultations. You then meet the surgeon in person at PAI in Bangkok before any operation goes ahead. The questions below are grouped by procedure so you can use them at either stage.

General questions - Is Dr. Preecha going to operate on me personally? PAI lists Dr. Burin and Dr. Sutin on the same pages, so ask for the name of the operating surgeon, and of the rest of the team, in writing. - Is my procedure one PAI does in its own theatres under local anaesthesia, or will I be admitted to an affiliated hospital for general anaesthesia? Which hospital, and who is the anaesthetist? - What tests do you need before surgery, and could I have any of them done at home first? - Which items are in the quote (hospital nights, anaesthetic, medicines, compression garments, transport, follow-up visits), and how would a revision be charged? - After I fly home, whom should I contact about a complication, and can I have a copy of my operation notes in English?

Vaginoplasty, vulvoplasty or orchiectomy - For my anatomy, would you advise penile skin inversion, the version with a scrotal graft, or sigmoid colon, and why? - How much depth can I realistically expect, and what will my dilation schedule look like in the first months and afterwards? - Which documents do you need from me: how many letters, from whom, and what length of hormone therapy? - Should I begin hair removal, and how many months beforehand? - If you might want biological children, discuss fertility preservation before any surgery that removes the testes. - How long will I be an inpatient, and on what day after surgery are patients usually allowed to fly?

Revision after vaginoplasty elsewhere - Which records and photos should I send from my original surgery? - Do I need a secondary sigmoid colon procedure, or could a smaller correction address the problem?

Facial feminization - Which of my procedures can safely be combined, and which would you split into separate stages? - Will a CT scan be required, or are my existing scans enough? - Where would the incisions for brow and hairline work go, and what should I expect in terms of scarring and numbness?

Breast implant revision - What do you think is causing the problem, and do you plan to exchange, reposition or remove the implants? - Which implant brand and type would you use, and will I get an implant card?

Nose, eyelids and facelift - Will this be under local or general anaesthesia, and at PAI or in hospital? - For nose augmentation, would you use an implant or my own cartilage, and how do the two compare for my nose? - When can I fly, and which activities should I avoid during the first weeks?

The arrangements below are PAI's own, not services of ThaiCosmeticSurgery.com, and the clinic notes that some of them depend on which package you book.

Arriving. PAI arranges pickup at Suvarnabhumi Airport, and its contact page says the driver meets patients at door 4 once they are through customs. Depending on the package, transport between the airport, hotel, hospital and clinic may be included or offered as an extra, and so may local rides of up to 2 km from the clinic during the follow-up period.

Staying. The clinic helps book rooms at partner hotels close to Sukhumvit 55 at corporate rates. If your embassy or passport office needs a supporting letter for a visa, PAI can provide one.

Communicating. Dr. Preecha's own profile lists English and Thai. PAI's contact page adds Chinese, French, German, Italian, Japanese, Spanish and Turkish to the clinic's languages, and PAI says it can arrange an interpreter whatever language you speak.

Before you travel. The first step is an email assessment by the attending physician; PAI does not do video calls.

Where each stage happens. Consultations and follow-up visits are at PAI on Sukhumvit 55 in Thonglor. When general anaesthesia is needed, you are admitted to one of PAI's affiliated hospitals. The two hospitals shown in PAI's gallery, Phyathai 2 and ViMUT, both appeared with Hospital Program accreditation when we looked them up in the Joint Commission International (JCI) online directory on 27 September 2026. We found no JCI or HA Thailand accreditation record for PAI itself. Accreditation looks at how a facility runs its systems, such as infection control; it is not a prediction about your own result. Ask PAI to confirm in writing the hospital where your surgery is scheduled.

How long to plan for (general guidance). Our procedure guides give these typical total stays in Thailand for international patients: - Orchiectomy, tracheal shave, labiaplasty or eyelid surgery: commonly 5–7 days - Liposuction, rhinoplasty or breast augmentation: commonly 7–10 days - Top surgery, FFS or a facelift: commonly 10–14 days - A tummy tuck: commonly 12–14 days - Vaginoplasty: commonly 3–4 weeks, of which commonly 5–7 nights are spent in hospital

Your flight date depends on the surgeon's clearance, so buy a fare that can be moved cheaply. After vaginoplasty you will want somewhere quiet and private to rest and dilate, and many patients travel with a companion. For chest, breast or abdominal operations, bring front-fastening tops and do not plan on carrying heavy bags yourself.

PAI begins with an email review for patients abroad, so the detail in your first message shapes how useful the reply can be. Use our booking form or WhatsApp for any medical details, and hold back photos until Dr. Preecha's team asks for them.

Everyone should include - The procedure or problem, and that you are asking for Dr. Preecha - Possible travel dates and the length of your stay - Age, height and weight - Medical conditions, allergies, current medicines and supplements, and your use of tobacco, vapes or other nicotine products - Earlier operations, plus the operation notes if the same area was operated on before

Genital surgery - Hormone details: which medicines, since when, and who prescribes them - Any assessment or referral letters - Your hair removal progress to date - Whether you want a vaginal canal (vaginoplasty) or not (vulvoplasty), if you have already decided

Revision of an earlier vaginoplasty - Your first surgeon's name, the date of surgery and the technique used - Operation notes and the discharge summary - What has gone wrong, for example lost depth or narrowing, and how you have been dilating

FFS or tracheal shave - A priority order for the features you want changed - CT scans or imaging reports you already have - Past facial surgery, implants or filler - Front and profile photos in even light, if requested

Top surgery - Assessment letters you already hold - Chest photos, only if requested, so a technique can be suggested

Breast implant revision - The implant card, or failing that the implant's brand, size, type, surface and position - The date of the original augmentation and the operation notes - Recent breast scan reports, and what has changed

Other procedures - Rhinoplasty: front, profile and base photos if requested, and any earlier nose surgery, injury or breathing difficulty - Eyelids: dry eye, glaucoma, thyroid eye disease or vision problems - Liposuction or tummy tuck: how stable your weight has been, and for a tummy tuck any plans for future pregnancy - Labiaplasty: what you would like changed and any previous gynaecological surgery