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Philadelphia-based orthodontic practice offering Invisalign and conventional braces for adults and teens.
About Philadelphia Orthodontists
Missing or unusually sized teeth get worked into Invisalign plans under Dr. William Roberts, alongside braces for both kids and adults.
Philadelphia Orthodontists sees a high volume of Invisalign and clear aligner cases, including corrections for crowding, missing teeth, and open bites left over from teenage relapse. Reviews describe Dr. William Roberts, along with Dr. Daniel Markel and Dr. DeMarsche, working through unusual or difficult tooth movement rather than routine cases alone. Staff members, including several named assistants, are described as warm and efficient with insurance paperwork, and appointments are generally reported as running on schedule.
Summary of 200 patient reviews, December 2021–August 2026, updated September 2026
Philadelphia-based orthodontic practice offering Invisalign and conventional braces for adults and teens.
Drs. Roberts, de Marsche, and Markel have treated over 3,000 patients across two locations in Center City Philadelphia and Lawrenceville, New Jersey.
Treatments offered
Who They Treat
Philadelphia Orthodontists provides orthodontic treatment for the following age groups:
Technology & Equipment
Philadelphia Orthodontists uses modern orthodontic technology to deliver precise, comfortable treatment.
Orthodontists at this office
Dr. Daniel Markel, DMD
NPI verified · no bio or photo on file
Dr. Tanja de Marsche
NPI verified · no bio or photo on file
Dr. William Roberts, DMD
NPI verified · no bio or photo on file
Insurance accepted
6 plans listedWhat patients say
Latest review 3 months ago
What patients praise
Things to know
Who it suits
Doctors patients mention
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| Nov 2023 | 6 |
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| Oct 2024 | 0 |
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| Jan 2026 | 5 |
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| Jul 2026 | 5 |
| Aug 2026 | 3 |
| Sep 2026 | 0 |
| Theme | Praise | Criticism |
|---|---|---|
| Friendly staff | 106 | 1 |
| The orthodontist | 78 | 1 |
| Treatment results | 74 | 2 |
| Scheduling & wait times | 20 | 0 |
| Clear explanations | 17 | 1 |
| Treatment timeline | 14 | 3 |
| Gentle, comfortable care | 14 | 1 |
| Office & technology | 11 | 0 |
Recent reviews from Google
I had a fantastic experience with Dr. Roberts and team! Dr. Roberts is an experienced, knowledgeable orthodontist and I felt very confident in his care. Everyone in the office is welcoming, friendly, and accommodating. A special thank you to Judy, the orthodontic technician, for always being so kind and helpful. The entire process was smooth, and I’m thrilled with the results. My teeth are exactly as I hoped. Highly recommend!
By far, this has been the best experience I’ve ever had with braces from start to finish. I started my journey as Dr. Roberts’ patient and was later transferred to Dr. Dan. That’s where the real magic happened! He saw even more ways to enhance my smile and took it from great to absolutely amazing. The entire team is incredible. Every visit, I’m welcomed with such positive energy. Everyone is genuinely kind, happy, and makes you feel like family. They always take the time to have great conversations, making every appointment enjoyable instead of stressful. If you’re thinking about getting braces for yourself or your children, this is truly the top-tier place to go. I couldn’t be happier with my results or my experience. They get a 100/100 from me, and I highly recommend them!
Needed a retainer replacement and the whole process was painless. Staff was friendly, the turnaround was quick, and everything was handled without any hassle. Would definitely come back.
My experience at Philadelphia Orthodontists was incredible!! Dr. Dan is absolutely lovely and has wonderful “bedside” manor. Honestly, the entire team is great. Ny helped me several times and was very patient. If you’re thinking about getting braces as an adult DO IT!! I can’t wait to show off my PERFECT teeth at my wedding. Thank you sooooooo much Dr. Dan.
I have been a patient here for over 10 years and I would still recommend them! They are excellent and Ive been told my teeth is my biggest flex. 10/10!
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