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Office Policies/Mission

Our Office

The office of Sein H. Siao, D.M.D. and Associates is conveniently located at 14 Common Street, across from the town common in the center of Wrentham, MA. We are in the Heritage Building Rear Suite #6. Drs. Siao prides himself on being technologically advanced by utilizing proven dental technologies that give the patient a safer and more pleasant dental experience.  We offer overhead plasma televisions with cable attached to our dental chairs for you pleasure to watch during treatments.

Mission Statement

The office of Sein H. Siao, D.M.D. and Associates strives to make it their goal to provide the best quality dentistry for all ages.  With the stability and growth of the practice and over 40 years experience combined, we are flattered with our patient base and their referrals over the years.  We offer a wide variety of dental services, including preventative, cosmetic and restorative dentistry.  Unlike other offices the culture of hard work and dedication has been proved to our patients. Our office continues to invest in the latest technology and maintains the best and most skilled employees. We pride ourselves on our patient centered practice.

Hours of Operation

Monday8:00am to 7:00pm
Tuesday7:30am to 7:00pm
Wednesday7:30am to 5:00pm
Thursday7:30am to 5:00pm
Friday8:00am to 3:00pm
Saturdays Available


Your scheduled appointment time has been reserved specifically for you.  We request at least 24 hours notice if you need to cancel your appointment.  We are aware that unforeseen events sometimes require missing an appointment.  After missing your second appointment without notifying us 24 hours in advance, you are subject to being charged a broken appointment fee.
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Our office is committed to helping you maximize your insurance benefits.  Because insurance policies vary greatly, we can only estimate your coverage in good faith but cannot guarantee coverage due to the complexities of insurance contracts.  Your estimated patient portion must be paid at the time of service.  As a service to our patients, we will bill insurance companies for services and allow them 45 days to render payment.  After 60 days, you are responsible for the entire balance, paid in full.  If you have any questions, our courteous staff is always available to answer them.


Your treatment plan will include a breakdown of all applicable fees, for the procedure being performed.  We will inform you of all cost before treatment is administered.  Patient’s charges are due at the time of service.  For you convenience we accept M/C, Visa, Discover, and American Express.  We also offer other financial options such as CareCredit and Citi Health Card.

We will submit all insurance claims for you.  We take most insurances.  We will fully attempt to help you receive full insurance benefits; however you are personally responsible for your account.