Sein H. Siao, DMD
- Part D claims, 2024
- 75
- Industry payments
- $273
- Affiliated sites
- 1
- State license
- 1
- Year NPI issued
- 2005
- Practice address
- 14 Common St, Wrentham, MA 02093-1348
- Practice phone
- Call (508) 384-8136
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sein H. Siao, D.M.D. & Associates
Physician office · Wrentham, Massachusetts
Find Sein Siao's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Sein H. Siao is a general practice dentistry in Worcester, Massachusetts
Sein Siao practices at Sein H. Siao, D.M.D. & Associates in Wrentham, Massachusetts.
Sein Siao's NPI, 1366429128, was assigned on December 22, 2005. Sein Siao holds Massachusetts license 19898.
- NPI
- 1366429128NPI Registry (opens in a new tab)
- NPI enumeration date
- December 22, 2005
- NPI status
- Active
- Practice phone
- (508) 384-8136
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Sein H. Siao practices in Wrentham and Worcester
Sein Siao's primary practice is Sein H. Siao, D.M.D. & Associates, at 14 Common St, Wrentham, MA 02093-1348. The practice phone is (508) 384-8136. The NPI Registry lists Sein Siao's practice address as 239 Mill St, Worcester, MA 01602.
- Sein H. Siao, D.M.D. & AssociatesPrimary14 Common St, Wrentham, MA 02093-1348Phone(508) 384-8136
- NPI Registry address239 Mill St, Worcester, MA 01602 · Worcester County
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Sein H. Siao is affiliated with 1 site of care
Sein Siao's primary practice is Sein H. Siao, D.M.D. & Associates in Wrentham, Massachusetts.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Sein H. Siao's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Sein Siao practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sein H. Siao, D.M.D. & Associates | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Sein H. Siao is one of 1,941 general practice dentistrys in Massachusetts
General practice is Sein Siao's primary specialty in the NPI Registry, under taxonomy code 1223G0001X. Sein Siao is licensed in Massachusetts.
Specialties and state licenses
- General practice dentistry, MassachusettsPrimary
General practice dentistrys near Sein Siao
Counts of general practice dentistrys with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Sein H. Siao's patients have a median age of 80
Across all payers, Dmand AI patient panel data puts Sein Siao's median patient age at 80, with 67% women.
Sein Siao's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 80
Patient panel by sex, all payers
- Women67%
- Men33%
Source: Dmand AI Patient Panel Data
Sein H. Siao wrote 75 Medicare Part D claims in 2024
In 2024, Sein Siao wrote 75 Medicare Part D claims for 46 patients. 93% of them were for generic drugs.
Sein Siao's Part D claims by kind of drug, 2024
- Generic70 claims93%
- Brand-name and other5 claims7%
Drug classes CMS tracks in Sein Siao's Part D claims, 2024
- Antibiotics79%59 of 75 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Sein H. Siao received $273 in industry payments in 2025
CMS Open Payments shows 2 general payments to Sein Siao from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Patterson Companies, Inc. paid the most, $273.
Companies that paid Sein Siao the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Sein H. Siao's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Sein H. Siao
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Sein H. Siao's NPI number?
Sein H. Siao's NPI number is 1366429128. It was assigned on December 22, 2005, and it is active in the NPI Registry.
What does Sein H. Siao specialize in?
Sein H. Siao is a general practice dentistry in Worcester, Massachusetts. The primary specialty in the NPI Registry is General Practice Dentistry (taxonomy code 1223G0001X).
Where does Sein H. Siao practice?
Sein Siao practices at 14 Common St, Wrentham, MA 02093-1348. Sein Siao also practices at 239 Mill St, Worcester, MA 01602. Sein Siao's primary practice is Sein H. Siao, D.M.D. & Associates in Wrentham, Massachusetts.
What is Sein H. Siao's office phone number?
The practice phone on file for Sein Siao is (508) 384-8136.
What is Sein H. Siao's medical license number?
Sein Siao holds Massachusetts license 19898.
Has Sein H. Siao received payments from drug or device companies?
CMS Open Payments shows $273 in general payments to Sein Siao from 1 company from 2025 to 2025. The largest total came from Patterson Companies, Inc.
How long has Sein H. Siao been practicing?
Sein Siao's NPI was assigned in 2005.
Selling to general practice practices?
See general practice dentistrys in Massachusetts by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card