Search  for anything...
Philips Sonicare

Philips Sonicare DiamondClean 9900 Prestige Electric Toothbrush - with SenseIQ Technology and Advanced AI App, 5 Brushing Modes, 3 Intensity Levels, Charging Travel Case,Midnight Blue, Model HX9990/12

  • Based on 2,029 reviews
Condition: New
Checking for the best price...
$325.85 Why this price?
Save $54.11 was $379.96

Buy Now, Pay Later

As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Mar 10
Order within 8 hours and 38 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Size: 1 Count (Pack of 1)


Color: Midnight


Features

  • A3 Premium All-in-One brush head removes up to 20x more plaque than a manual toothbrush; achieve 15x healthier gums in six weeks2, and up to 100% more stain removal in less than two days3
  • SenseIQ Technology senses your pressure, motion, and coverage up to 100 times per second; if you apply too much pressure, the toothbrush will adjust the intensity level to protect your teeth and gums
  • Gentle yet effective clean with up to 62,000 bristle movements per minute; Sonicare Fluid Action supports the bristles to clean by driving fluid deep between teeth and along the gumline
  • This electric toothbrush for adults has a light ring at its base that gently lets you know if you're overdoing the pressure; simply ease off when it lights up to help your gums stay protected
  • 15 brushing settings: select from 5 modes - Clean, White, Gum Health, Deep Clean+, and Sensitive - and one of three intensity levels for a personalized clean; select your preferences in the app
  • Achieve your oral health care goals with the Sonicare toothbrush and app: the two pair seamlessly to deliver guided brushing, tips and tricks, and content personalized to you
  • Brush head replacement reminder tracks how often and how hard you brush, then reminds you to replace your brush head once it's time; dental professionals recommend changing your brush head regularly
  • Rechargeable toothbrush providing up to 14 days of regular brushing on a full charge; with the included charging travel case, you can maintain your oral care routine, even while on the go
  • The set includes: 1x Prestige 9900 sonic electric toothbrush, 1x A3 Premium All-in-One brush head, 1x charging travel case, 1x charging stand, 1x USB cable

Description

Experience the most advanced sonic toothbrush in the range: Philips Sonicare Prestige 9900 with SenseIQ technology. Paired with the A3 Premium All-in-One brush head featuring multi-angle bristles, it removes up to 20x more plaque than a manual toothbrush. It also helps achieve 15x healthier gums in six weeks² and up to 100% more stain removal in less than two days³. SenseIQ Technology senses your pressure, motion, and coverage up to 100 times per second. If you apply too much pressure, the toothbrush will automatically adjust the intensity level to protect your teeth and gums. This Philips Sonicare toothbrush cleans gently yet effectively and cares for your teeth and gums with up to 62,000 bristle movements per minute. Sonicare Fluid Action supports the bristles to clean by driving fluid deep between teeth and along the gumline. A light ring that gently lets you know if you're overdoing the pressure. Enhance your oral care routine with 15 brushing settings. Select from five modes - Clean, White, Gum Health, Deep Clean+, and Sensitive - and adjust to one of three intensity levels for a customized clean. Achieve your oral health care goals with the Sonicare toothbrush and app. Benefit from guided brushing, tips and tricks, and content personalized to you. Together, you are unstoppable. Did you know that brush heads become less effective after three months? The replacement reminder tracks how often and how hard you brush, then reminds you to replace your brush head once it's time for a new one. Every detail of this Philips toothbrush is crafted with attention to detail by dedicated designers and engineers. Plus, with the included charging travel case, you can maintain your oral care routine, even while on the go. Experience up to 14 days of regular brushing on a full charge, bringing a new level of convenience to your daily routine. ¹ vs. a manual toothbrush ² vs. a manual toothbrush in 6 weeks ³ in lab test vs. a manual toothbrush ⁴ except for Philips One

Product Dimensions ‏ : ‎ 2.91 x 6.61 x 6.61 inches; 14.29 ounces


Item model number ‏ : ‎ HX9990/12


Batteries ‏ : ‎ 1 Lithium Ion batteries required. (included)


Date First Available ‏ : ‎ March 11, 2021


Manufacturer ‏ : ‎ Philips Sonicare


Best Sellers Rank: #19,312 in Health & Household (See Top 100 in Health & Household) #44 in Sonic Toothbrushes


#44 in Sonic Toothbrushes:


Customer Reviews: 3.9 3.9 out of 5 stars (1,228)


Brand Name: Philips Sonicare


Age Range Description: Adult


Included Components: Cover, Travel Case


Model Name: av2022-Philips Sonicare-rechargeable electric power toothbrush with senseiq-edc7f249


Target Audience: Unisex-Adults


Package Type Name: Box


Global Trade Identification Number: 96


Manufacturer: Philips Sonicare


UPC: 075020096296


Manufacturer Part Number: HX9990/12


Model Number: HX9990/12


Other Special Features of the Product: Bluetooth Connectivity, Brushing Timer, Rechargeable


Power Source: Battery Powered


Item Firmness Description: Soft


Toothbrush Head Shape: Oval


Operation Mode: Automatic


Number of settings: 3


Reusability: Reusable


Mount Motion: Vibrate


Number of Items: 1


Unit Count: 1.0 Count


Number of Pieces: 1


Item Dimensions: 2.91 x 6.61 x 6.61 inches


Item Weight: 405 Grams


Material Features: Reusable


Bristle Material: Nylon


Handle Material: Plastic


Color: Midnight


Theme: Dental Care


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Mar 10

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Its not cheap but neither is dental work
Size: 1 Count (Pack of 1) Color: Midnight
My dental hygienist recommended this toothbrush. After 6 months of use, the parameters for measuring gum issues have greatly improved. You can pair it with your phone to get a good real-time read of whether you're using the toothbrush correctly. After a few sessions, you'll get the feel of it. Easy to recharge. Charge lasts for several weeks of twice daily cleaning. Works in the short. Good quality. Feels a little strange at first in certain parts of your mouth; becomes "brushing as usual" after a few weeks. Really saw improvement in dental check-up. It's worth the $$s ... show more
Reviewed in the United States on October 26, 2025 by Amazon Customer
    • By Far My Favorite Toothbrush!
Size: 1 Count (Pack of 1) Color: Midnight
I'm just going to start off by saying this is my favorite toothbrush that I have owned so far, even if it is very pricey! Prior to this toothbrush, I have been alternating between an Oral-B electric toothbrush with a round head and a traditional toothbrush. The toothbrush arrives well packaged and is very easy to setup. I do use the app (iOS) while brushing my teeth. The build quality is top notch, it doesn't feel cheap. This should be expected being how expensive this toothbrush can go for. One of the reasons I chose this toothbrush over the lower models is due to its design and not having a physical button where grime can build up. The fewer crevices there are, the easier it is to keep the toothbrush clean and functioning properly. The charging puck is nice and works well. If I had any suggestions of improvement, it would be that the plastic piece that sits on top of the charger snap in place instead of just resting on top. It's so lightweight that and doesn't secure itself, that any attempt to move the charger or a bump to it can knock the plastic mount off of the charging puck. Other than that, the toothbrush sits securely and I haven't had an incident yet that could knock the toothbrush off. When brushing my teeth, I use the app and set the tooth brush to it's deep clean mode for a longer brush time. I can honestly say I don't recall my teeth ever feeling this clean from brushing at home. The closest experience I can compare it to is after having my teeth cleaned at the dentist. My whole mouth feels cleaner, my teeth feel smooth and polished, morning breath has been greatly reduced, and I have even noticed my teeth looking noticeably whiter as this toothbrush does an excellent job at removing stains (I don't smoke, but I do drink coffee and sodas). I was starting to notice this within the first 2 weeks of using the toothbrush and after about 1.5 months of use I still have the extra clean feeling after every brush and more stains have been removed from my teeth. The toothbrush is very easy to keep clean, especially with fewer crevices for grime to get caught up in. I also find that this toothbrush is less messy when being used, less drippage and such. My previous toothbrush, an Oral-B was horrendous for this. It had lots of crevices for grime to get into and the design of the brush heads allows toothpaste and saliva to drip down the handle. No such problem with this toothbrush. When I first got the toothbrush, one of my initial complaints was that it didn't allow me to capture my brushing data into Apple Health. But a few weeks ago Philips released an update to their app that does allow some data to be recorded into Apple Health, so that is a good start. Another complaint that I have which is related to the app (and how the toothbrush interprets input) is I sometimes run into problems with the toothbrush and app properly capturing the position and placement of my toothbrush. Even though I may be brushing in the area it wants me to, sometimes it has a hard time recognizing if I am brushing on the outside or the inside. When this happens, it may not flag enough time being brushed in that area and want me to brush for an additional amount of time to touch up those areas. And it isn't always the same area. This may be due to a calibration problem and it would nice if there was an easy way to quickly recalibrate the toothbrush so that it can better identify its position. On a side note, if you plan to use the app to track your brushing habits, I recommend getting something to mount your phone to your mirror. It will make using the app while brushing a lot easier. I do like how the app and toothbrush track the life of your brush head and recommends when it is time to replace it. Typical recommendation to replace a brush head is ever 3 months. I am currently two weeks away from 2 months of use and based on my current usage, it looks like I will be prompted to replace my brush head in about 2 weeks. So why am I getting about 2 months use out of my brush head instead of three? If I had to guess, it may be due to me doing the Deep Clean option which runs for 50% longer than a typical brushing session, 3 minutes vs 2 minutes. As such, the app and toothbrush may not be calculating my brush head use by number of sessions (like it displays it as) but really by how much time the brush head is used for. TL;DR The toothbrush is phenomenal but pricey. If you don't mind spending the money, or find it on sale, you won't be disappointed in the performance of the toothbrush. It does an excellent job at cleaning your teeth and removing stains. The app is decent, but there is always room for improvement. But seeing that improvements have already been made in the short time I have been using the toothbrush, I am hopeful that the app will continue to get better in the coming months. Adding an easy to use recalibrate option for its positioning awareness, I think, will be extremely helpful. I would also like to see more data being captured in Apple Health instead of just brush duration. The app captures a lot more data points that I would like be viewed in Apple Health as well. Not sure if this is a limitation with Apple Health or the app. ... show more
Reviewed in the United States on December 30, 2021 by VirtualMirage
    • Terrible durability, awful interface
Size: 1 Count (Pack of 1) Color: Midnight
Everything folks say here is true. This is the most expensive brush Sonicare makes. But unfortunately it's also the worst brush they've ever made. What make this brush seem like an upgrade at first glance, is the petite and efficient profile. Smaller case, and the haptic feedback buttons. In reality: - My brush handle broke in less than 2 years. The metal rod just became loose and the brush started to generate an awful sound - The haptic buttons are extremely easy to accidentally activate as you hold the brush normally - The haptic buttons are hard to press when you actually mean to press them. They're hard to find because their labels need to illuminate before you know where and what to press - The battery life seems shorter than the previous version - And here's the kicker, the brush just randomly turns off as you're brushing. Sometimes after 5 seconds, sometimes after 20 seconds, sometimes it works ok. I'm not the only one. You'll see tons of other reviewers experiencing the same problem. This issue happens even though the brush has the latest firmware, and is fully charged. Sonicare tried to make a brush that was their most efficient, visually most refined/simple brush they had ever made. In reality, they managed to over-engineer and over-design this thing to the point of hurting durability, functionality, affordability, and reliability. How is it not infuriating to pay so much for a brush and see it turn off at random times? Am I holding it wrong? This was experienced on two separate tooth brushes. 5 stars for the aspiration, 0 stars for the execution. ... show more
Reviewed in the United States on February 29, 2024 by F.
    • Excellent upgrade - very happy with this choice
Size: 1 Count (Pack of 1) Color: Midnight
Review Image by Lior Levi Lior Levi
I switched to the Philips Sonicare 9900 Prestige after experiencing recurring battery issues with my previous Oral-B iO9. Unfortunately, the battery would unexpectedly drop from around 60% to zero, and after three replacement units with the same problem, I decided it was time to try a different premium option in this category. I've been using the 9900 Prestige for about two weeks now and I'm really impressed. The brushing experience feels smoother and more gentle compared to what I was used to, while still delivering excellent cleaning results. The build quality is noticeably solid - it feels premium in hand and very well-made. I connected the app right from the start, and while the toothbrush works perfectly fine without it, I found the tutorials and tips genuinely helpful. They actually improved my brushing technique and made the experience more comfortable overall. A couple of things I really appreciate: the design prevents toothpaste from dripping down into the handle area, which keeps things cleaner, and the brush itself feels durable and built to last. It took me a day or two to adjust to the different brushing power, but once you get used to it, it's really quite good. The only minor downside is that you need the app to switch brushing modes or check the exact battery percentage. But considering my previous battery reliability issues, I'm just happy to have a brush that works consistently. Overall, I'm very satisfied with this purchase and would recommend it to anyone looking for a high-quality electric toothbrush. ... show more
Reviewed in the United States on January 4, 2026 by Lior Levi Lior Levi

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...