Class 4 Medical Device Licensing in Thailand: Clinical Evidence and Fees

How is a Class 4 medical device registered in Thailand? Through the Licensing pathway, which yields the Certificate of Licensed Medical Device. This is the highest-control route in the Thai system: it requires a complete CSDT dossier plus clinical evidence, and it frequently triggers expert review.

1. Key takeaways

Class 4 sits at the top of the Thai risk pyramid, and its requirements differ from Class 2/3 in three specific ways. The essentials are collected below.

• Class 4 registration follows the Licensing pathway and results in the Certificate of Licensed Medical Device, the strongest control instrument of the three certificate types.
• Compared with Class 2/3, Class 4 adds three things: clinical evidence is a hard requirement, because the Thai FDA examines clinical evaluation for high-risk products with increasing rigour and expects thorough literature evaluation or comparison reports against equivalent competing devices; the probability of expert review is significantly higher (Class 4 frequently triggers it); and the review time limit is longer — an official ceiling of 300 days, against 250 days for Class 2/3.
• Typical high-risk products, according to the classification examples published by the Thai FDA, include cardiac pacemakers, heart valves, fillers and HIV test kits. The guiding principle: devices in direct contact with the central circulatory system or central nervous system, implantable devices and active implantable devices generally fall into Class 4.
• Official fees for Class 4 on the import route: application fee 1,000 + expert fee 53,000 + certificate fee 20,000 = 74,000 Thai baht in total. For local manufacturing: 1,000 + 42,400 + 10,000 = 53,400 Thai baht. Where expert review is not triggered, the import base tier is 1,000 + 20,000 = 21,000 Thai baht.
• The 300 days is an official ceiling, not a typical value. Real duration depends heavily on dossier quality and pathway choice. Industry observation shows that well-prepared Class 4 devices on the abridged route can be approved relatively quickly, while a disorganised Class 2 dossier can drag on for months through multiple deficiency rounds — dossier quality determines real duration more than the nominal class does.
• Using the Reliance route on the Singapore HSA shortens the standard 150 working days to 60 working days and exempts the expert review.

2. Legal basis

The classification of high-risk devices rests on the MoPH classification notification B.E. 2562 (2019), whose Class 4 examples include cardiac pacemakers, heart valves, fillers and HIV test kits. The fee levels come from the fee schedule published on the Thai FDA website, in accordance with the ministerial fee framework. The review time limit for Class 4 is an official ceiling of 300 days, as listed by the Thai FDA. The Reliance pathway derives from the Thai FDA reliance announcement of June 4, 2024 (B.E. 2567), which enables approvals held from recognised reference authorities — including the Singapore HSA under the bilateral reliance arrangement — to shorten review from 150 working days to 60 working days and to waive the expert review. The applicable document matrix is the Class 2-4 matrix published on the Thai FDA website, applied here in its fullest form, with the clinical evidence obligation layered on top.

3. Expert insights

The single most useful insight about Class 4 is that the headline number misleads in both directions. The 300-day figure is an official ceiling, not a typical outcome, and the real duration is driven overwhelmingly by dossier quality and pathway selection. Industry observation records that a Class 4 device with complete documentation can be approved comparatively quickly on the abridged route, while a Class 2 dossier in disarray can take months and pass through several deficiency rounds. In other words, dossier quality decides the actual timeline more reliably than the nominal class does. Teams that internalise this stop treating the class number as a schedule predictor and start treating the dossier as one.

The second insight concerns clinical evidence. The Thai FDA applies increasingly strict review to the clinical evaluation of high-risk products and expects thorough literature evaluation or comparison reports against equivalent competing devices. Treating the clinical section as a formality is a common cause of repeated deficiency rounds, precisely where the dossier can least afford them.

4. Practical recommendations

• Do not be frightened off by the suggestion that Class 4 always takes 300 days, and equally do not be lulled into assuming Class 2 is automatically faster. Concentrate effort on two things instead.
• First, assess eligibility for an accelerated route. Holders of approvals from the Singapore HSA or the Malaysian MDA can use the reliance routes with no holding-period requirement; holders of approvals from the US FDA, an EU notified body, the TGA, Health Canada or the Japanese MHLW that have been valid for at least 1 year can use the abridged route.
• Second, build the CSDT correctly the first time to reduce the number of deficiency rounds. Getting these two things right means the real Class 4 cycle can be shorter than that of a Class 2 project with a repeatedly corrected dossier.
• Compile the clinical evidence — literature evaluation or equivalent-device comparison reports — to a depth appropriate for a high-risk device, since review scrutiny at this level is strict and rising.
• Budget on the tier including the expert fee (import total 74,000 baht) and settle by actual outcome, mirroring the approach recommended for Class 2-3.

5. Verification checklist

• □ Thai FDA website fee schedule (Class 4 import 74,000 baht / local 53,400 baht; expert fee 53,000 baht)
• □ Thai FDA website Class 2-4 document checklist matrix
• □ MoPH classification notification B.E. 2562 (2019) Class 4 examples (cardiac pacemakers, heart valves, fillers, HIV test kits)
• □ Thai FDA reliance announcement (June 4, 2024, B.E. 2567) and the HSA Reliance arrangement (60 working days)
• □ Thai FDA review time limit ceiling (Class 4: 300 days)

How GRZAN can help. GRZAN provides medical device and IVD registration, quality system, authorised representative and local testing support across Southeast Asia, including Thailand. Our team prepares dossiers to ASEAN CSDT structure, manages submissions and deficiency responses with the Thai FDA, and supports post-market vigilance obligations. Business enquiries: info@grzanglobal.com