Lassus Tandartsen
According to our open methodology, this clinic scored 86.1/100 for transparency, reputation, service accessibility, and digital visibility.
Overall rank: #2 of 31 ranked clinics · Last checked: 17 September 2026
82.7 of 100
Visibility in ChatGPT and Gemini answers
How often ChatGPT and Gemini name this clinic when a patient asks them to recommend a dentist. Measured by Ansmeter, 8 October 2026.
Ansmeter is an affiliated service. Its figure is not part of this rating and does not affect positions — scores change only when public data changes.
Positions by Rating Profile
- Overall Transparency & Trust#286.1/100
- Best for Expats#280/100
- Best for Dental Implants#287.5/100
- Best for Emergency Dental Care#481/100
- Best Price Transparency#289.9/100
- Best English-speaking Clinics#277.5/100
- Best for Families / Children#382.1/100
- Sleep Dentistry (GA / deep sedation)not ranked
General Anaesthesia & Deep Sedation
Whether the clinic documents treatment under general anaesthesia or deep / twilight sedation — "sleep dentistry", where the patient is asleep and unaware (does not feel, see, or hear the procedure). Ordinary conscious sedation, where the patient stays awake and responsive, does not count here. This is informational and does not affect the transparency score.
- ? General anaesthesia / deep sedation (sleep dentistry) — Not verified Own site has no sedation page; third-party listing mentions laughing gas but this could not be confirmed on a page opened directly
Summary
Multi-location dental group in Amsterdam (Keizersgracht, Lassusstraat, Stadionplein) open 365 days a year including evenings and weekends. Full-service including emergency care, implants, orthodontics, oral surgery and pediatric dentistry, with an English-language website marketed to expats. Google reviews are mixed, with some recurring comments about billing and appointment management.
Strengths
- Information Transparency: 20 of 20 points.
- Price Transparency: 15 of 15 points.
- Medical Infrastructure: 15 of 15 points.
- AI & Search Visibility: 8 of 10 points.
- No red flags identified in public sources.
Weaknesses
No category fell below the weakness threshold (50% of verifiable points).
Score Breakdown
Every criterion below is scored from public sources. ✓ verified yes · ✗ verified no / not found · ◐ partial · ? unverified (scores 0, not a negative finding).
Information Transparency
Whether basic facts about the clinic - its team, premises, services, and location - are publicly verifiable.
Price Transparency
Whether patients can estimate costs before visiting. Published price ranges count; exact prices are not required.
| ✓ | Prices or price ranges published Corrected: full NZa tariff PDF (dentistry and orthodontics) hosted on the clinic's own site [lassus-tandartsen-deepen] | 3/3 |
| ✓ | Cleaning price listed [lassus-tandartsen-deepen-7] | 2/2 |
| ✓ | Filling price listed [lassus-tandartsen-deepen-8] | 2/2 |
| ✓ | Crown price listed [lassus-tandartsen-deepen-9] | 2/2 |
| ✓ | Implant price listed [lassus-tandartsen-deepen-10] | 2/2 |
| ✓ | Consultation price listed [lassus-tandartsen-deepen-11] | 2/2 |
| ✓ | X-ray / imaging price listed [lassus-tandartsen-deepen-12] | 2/2 |
Reputation & Reviews
Public review signals. The Google rating is adjusted with a Bayesian prior (rating 4.0, weight 25) so a 5.0 from a handful of reviews does not outrank a 4.8 from hundreds.
| ◐ | Google rating (Bayesian-adjusted) as of 2026-09-17 [lassus-tandartsen-deepen-13] | 3/6 |
| ✓ | Google review volume as of 2026-09-17 [lassus-tandartsen-deepen-14] | 3/3 |
| ✓ | Review recency [lassus-tandartsen-deepen-15] | 3/3 |
| ✓ | Clinic responds to reviews The owner replies to reviews on Google: 5 of the 10 reviews read carry an owner reply, 3 of them to reviews from the last 12 months; the latest reply is dated 2026-05-20 (to a review of 2026-05-12). [lassus-tandartsen-deepen-16] | 2/2 |
| ? | No recurring complaints 1–2★ are 13.1 % of 880 (1★ 97 / 2★ 18 / 3★ 28 / 4★ 86 / 5★ 651); the lowest-rated reviews read share no common theme (an unfinished root canal, repeated visits, a consult-only appointment, a rescheduled appointment, a general boycott call). [lassus-tandartsen-deepen-16] | 0/2 |
| ✓ | No suspicious review patterns No manipulation signals found [lassus-tandartsen-deepen-2] | 2/2 |
| ✓ | Active Facebook presence Clinic's own, active Facebook page, linked from its site [lassus-tandartsen-deepen-18] [lassus-tandartsen-deepen-19] | 1/1 |
| ✗ | TripAdvisor presence [lassus-tandartsen-deepen-3] [lassus-tandartsen-deepen-17] | 0/0.5 |
| ✓ | Other review platforms Listed on ZorgkaartNederland (1,207 ratings, average 9.0/10) and on WhatClinic (1 review, rating 5.0/5). [lassus-tandartsen-platforms] [lassus-tandartsen-platforms-2] | 0.5/0.5 |
Medical Infrastructure
The range of publicly documented equipment and services. This measures documented availability, not clinical quality.
| ✓ | On-site X-ray [lassus-tandartsen-deepen-5] | 2/2 |
| ✓ | CBCT (3D imaging) [lassus-tandartsen-deepen-6] | 2/2 |
| ✓ | Implantology [s1] | 2/2 |
| ✓ | Orthodontics [s1] | 2/2 |
| ✓ | Oral surgery [s1] | 2/2 |
| ✓ | Pediatric dentistry [s1] | 1.5/1.5 |
| ✓ | Emergency care [s1] | 1.5/1.5 |
| ✓ | Works with international patients [s1] | 2/2 |
Communication & Service
How easy it is to contact the clinic, get answers, and book - especially for international patients.
AI & Search Visibility
Whether the clinic is discoverable when patients search - including via AI assistants. Checked with fixed queries: "best dentist Netherlands", "English speaking dentist Netherlands", "dental implants Netherlands", "emergency dentist Netherlands", "Netherlands dental clinic for expats".
| ✓ | Mentioned for: best dentist Netherlands [sq-best] | 1/1 |
| ✓ | Mentioned for: English speaking dentist Netherlands [sq-english] | 1/1 |
| ✓ | Mentioned for: dental implants Netherlands [sq-implants] | 1/1 |
| ✓ | Mentioned for: emergency dentist Netherlands [sq-emergency] | 1/1 |
| ✓ | Mentioned for: Netherlands dental clinic for expats [sq-expats] | 1/1 |
| ✓ | Structured data on website [lassus-tandartsen-deepen-4] | 1.5/1.5 |
| ? | Google indexing quality | 0/2 |
| ✓ | Dedicated service pages [s1] | 1.5/1.5 |
Licensing & Credentials
Whether the clinic publishes its operating licence and the dentists working there together with their professional licence numbers. A verified “not published” is recorded as a red flag; data we have not checked yet is shown as unverified and carries no penalty.
Clinic operating licence: not checked against public sources yet — unverified, no penalty
Dentists & professional licences
No published dentist roster is recorded for this clinic yet — unverified, no penalty.
Red Flags
No red flags identified in the public sources we reviewed.
Data We Could Not Verify
- Reputation & Reviews: No recurring complaints
- Communication & Service: Response speed
- Communication & Service: Pre-visit consultation possible
- AI & Search Visibility: Google indexing quality
Unverified items score 0 points but are not treated as negative findings. If you can document any of them, please send a correction.
Contact Information
| Website | https://lassustandartsen.nl/amsterdam/en/ |
|---|---|
| Phone | +31 20 42 21 912 |
| Address | Keizersgracht 132, 1015 CW Amsterdam (also Lassusstraat 9 and Stadionplein 125) |
Contact details are provided for identification only and may change; verify with the clinic directly.
Sources
| ID | Source | What it supports | Accessed |
|---|---|---|---|
| s1 | https://lassustandartsen.nl/amsterdam/en/ | addresses, phones, English site, services, hours | 2026-07-14 |
| s2 | https://www.yelp.com/biz/lassus-tandartsen-amsterdam-5 | Google rating 4.2 / 765 reviews and mixed billing feedback (via search summary) | 2026-07-14 |
| lassus-tandartsen-refresh | https://www.google.com/maps/place/Lassus+Dentists/@52.376658,4.8866… | Google rating 4.3 (868 reviews) as of 2026-08-25 | 2026-08-25 |
| sq-best | search:best dentist Netherlands | AI/search mention | 2026-08-28 |
| sq-english | search:English speaking dentist Netherlands | AI/search mention | 2026-08-28 |
| sq-implants | search:dental implants Netherlands | AI/search mention | 2026-08-28 |
| sq-emergency | search:emergency dentist Netherlands | AI/search mention | 2026-08-28 |
| sq-expats | search:Netherlands dental clinic for expats | AI/search mention | 2026-08-28 |
| lassus-tandartsen-deepen | https://lassustandartsen.nl/oisterwijk/wp-content/uploads/2025/12/L… | PDF hosted on the clinic's own domain: full 2026 NZa code list (C consultations, X radiographs, M preventive care, V fillings, R crowns, J implants) with EUR prices per code, read 2026-09-17 | 2026-09-17 |
| lassus-tandartsen-deepen-2 | https://www.google.com/maps?cid=6297001845141418682&hl=en | Histogram not skewed to 5★ only (650/878=74%); the 5 read reviews span 2026-04 to 2026-08; reviewer accounts show 4-21 prior reviews each | 2026-09-17 |
| lassus-tandartsen-deepen-3 | https://www.tripadvisor.com/TypeAheadJson?action=API&query=Lassus%2… | TripAdvisor's own search for "Lassus Tandartsen Amsterdam" returns only destination/geo results, no business listing | 2026-09-17 |
| lassus-tandartsen-deepen-4 | https://lassustandartsen.nl/en/ | Homepage carries schema.org JSON-LD referencing an Organization entity | 2026-09-17 |
| lassus-tandartsen-deepen-5 | https://lassustandartsen.nl/en/specialisatie/dental-anxiety/ | "Only dental checks and X-rays will be taken" during a first appointment | 2026-09-17 |
| lassus-tandartsen-deepen-6 | https://lassustandartsen.nl/en/dental-surgery-what-is-it-and-when-i… | Implant procedure described as including "Diagnosis through the use of a three dimensional CBCT scan" | 2026-09-17 |
| lassus-tandartsen-deepen-7 | https://lassustandartsen.nl/oisterwijk/wp-content/uploads/2025/12/L… | M03 Gebitsreiniging (cleaning), per 5 minutes, priced in the clinic's own NZa tariff PDF | 2026-09-17 |
| lassus-tandartsen-deepen-8 | https://lassustandartsen.nl/oisterwijk/wp-content/uploads/2025/12/L… | V71-V95 filling codes (amalgam, glass-ionomer, composite) priced in the clinic's own NZa tariff PDF | 2026-09-17 |
| lassus-tandartsen-deepen-9 | https://lassustandartsen.nl/oisterwijk/wp-content/uploads/2025/12/L… | R-series crown codes priced in the clinic's own NZa tariff PDF | 2026-09-17 |
| lassus-tandartsen-deepen-10 | https://lassustandartsen.nl/oisterwijk/wp-content/uploads/2025/12/L… | J-series implant codes priced in the clinic's own NZa tariff PDF | 2026-09-17 |
| lassus-tandartsen-deepen-11 | https://lassustandartsen.nl/oisterwijk/wp-content/uploads/2025/12/L… | C001-C003 consultation codes priced in the clinic's own NZa tariff PDF | 2026-09-17 |
| lassus-tandartsen-deepen-12 | https://lassustandartsen.nl/oisterwijk/wp-content/uploads/2025/12/L… | X10-X26 radiograph codes priced in the clinic's own NZa tariff PDF | 2026-09-17 |
| lassus-tandartsen-deepen-13 | https://www.google.com/maps?cid=6297001845141418682&hl=en | Google listing 2026-09-17: 4.3 from 878 reviews; histogram 1★ 97 / 2★ 19 / 3★ 26 / 4★ 86 / 5★ 650 | 2026-09-17 |
| lassus-tandartsen-deepen-14 | https://www.google.com/maps?cid=6297001845141418682&hl=en | Google listing 2026-09-17: 878 reviews (was 868 on 2026-08-25) | 2026-09-17 |
| lassus-tandartsen-deepen-15 | https://www.google.com/maps?cid=6297001845141418682&hl=en | Newest of 5 relevant reviews read dated 2026-08-17 | 2026-09-17 |
| lassus-tandartsen-deepen-16 | https://www.google.com/maps?cid=6297001845141418682&hl=en | Google listing "Lassus Dentists" (Dentist, Cosmetic dentist, Dental clinic), read 2026-10-05 in two review orders (the five lowest-rated and the five newest): rated 4.3 from 880 reviews (1★ 97 / 2★ 18 / 3★ 28 / 4★ 86 / 5★ 651); 10 distinct reviews read, dated 2022-08-02 to 2026-09-25, 5 with an owner reply | 2026-10-05 |
| lassus-tandartsen-deepen-17 | https://lassustandartsen.nl/en/ | No TripAdvisor link found across the clinic's pages read | 2026-09-17 |
| lassus-tandartsen-deepen-18 | https://www.facebook.com/LassusTandartsen | Facebook page "Lassus Tandartsen", 5,400 followers; bio names all three locations: Lassusstraat 9, Keizersgracht 132 and Stadionplein 125, Amsterdam. Read 2026-09-29. | 2026-09-29 |
| lassus-tandartsen-deepen-19 | https://lassustandartsen.nl/amsterdam/en/ | The clinic's site links to its Facebook page facebook.com/LassusTandartsen. Read 2026-09-29. | 2026-09-29 |
| lassus-tandartsen-platforms | https://www.zorgkaartnederland.nl/zorginstelling/tandartsenpraktijk… | ZorgkaartNederland: page of Lassus Tandartsen Keizersgracht - Amsterdam; 1,207 patient ratings, average 9.0/10 (checked 2026-10-01) | 2026-10-01 |
| lassus-tandartsen-platforms-2 | https://www.whatclinic.com/dentists/netherlands/amsterdam/lassus-ta… | WhatClinic: profile of Lassus Tandartsen - Keizersgracht, Keizersgracht 132, Amsterdam; 1 review, rating 5.0/5 (checked 2026-10-01) | 2026-10-01 |
Change History
| Date | Change |
|---|---|
| 2026-10-05 | Read the clinic's Google listing on 2026-10-05 (its lowest-rated and newest reviews with the star histogram): the owner replies to reviews. |
| 2026-09-29 | Re-checked on 2026-09-29 whether the clinic has an identifiable Facebook page: the clinic's site links to its own, active Facebook page, which names all three Amsterdam locations. |
| 2026-09-17 | Re-read on 2026-09-17: the clinic's website (rates PDF, dental-anxiety, dental-surgery and endodontology pages) and its Google listing. Corrected: the clinic publishes its own full 2026 NZa tariff PDF (consultations, X-rays, cleaning, fillings, crowns, implants all priced) - previously recorded as not publishing prices. Recorded: X-rays and CBCT scanning confirmed for implant diagnosis; Google rating steady at 4.3 with the review count rising to 878; no signs of review manipulation. Corrected: a prior recurring-complaints flag carried no supporting citation and could not be confirmed from the readable reviews - left unresolved. Still unverified: whether the clinic responds to reviews beyond the sample read, Facebook presence, and online pre-consultation. |
| 2026-08-27 | Data-integrity fix (national index build): this Netherlands-wide site previously held this record as a naive city-name find-and-replace clone ("Amsterdam" -> "Netherlands") of the amsterdam-dental site, which corrupted the clinic name, street address and cited Google Maps place URLs (e.g. the map link resolved to a non-existent place name). Restored verbatim from the amsterdam-dental source of record (the verified original); no re-verification of underlying facts performed in this pass beyond confirming the two records now match. Added a "city" field (Amsterdam) to support this index's national city breakdown. |
| 2026-08-25 | Re-verification 2026-08-25: confirmed website live, address and phone unchanged, clinic open; Google rating moved 4.2→4.3 and review count 765→868. |
A question or a correction?
Have a question, a suggestion, or a correction to this page? Get in touch — we read every message. Verified data corrections are reviewed against sources and applied with a public change-history entry.