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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. SEIN H. SIAO DMD
NPI 1366429128
Dentist - General Practice in Wrentham, MA

Active since December 22, 2005PECOS Enrolled
14 COMMON ST, WRENTHAM, MA 02093(508) 384-8136(508) 384-2531 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Sein H. Siao Dmd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. SEIN H. SIAO DMD (NPI 1366429128) is an individual general practice provider in Wrentham, Massachusetts, licensed in Massachusetts (19898) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1366429128
Entity TypeIndividualMale
Primary Taxonomy1223G0001X
Provider Legal NameDR. SEIN H. SIAOCredential: DMD
Location Address14 COMMON STWrentham, MA 02093-1348
Mailing Address23 Burr StFramingham, MA 01701-4616 · (508) 875-4029 · Fax (508) 384-2531
Phone(508) 384-8136
Fax(508) 384-2531
Sole ProprietorNo
Enumeration DateDecember 22, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1366429128 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers
Taxonomy Code1223G0001X
License✔ Licensed in MA · 19898
Definition
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.
14 COMMON ST, Wrentham, MA 02093
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Sheld, Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Sein H. Siao Dmd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02093 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$97.64 typical visit price
range $63.72 – $189.86
Typical copayment $24.41 (range $15.93 – $47.46)
Most-billed visit code 99203
Established Patient
$78.84 typical visit price
range $21.07 – $155.29
Typical copayment $19.71 (range $5.26 – $38.82)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SEIN H. SIAO, DMD & ASSOCIATES, P.C.
Dentist
14 COMMON ST
WRENTHAM, MA 02093
Norfolk County (508) 384-8136

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Sein Siao's NPI number?

The NPI number for Sein Siao is 1366429128. It was assigned to this individual provider in the NPPES registry on December 22, 2005.

Where is Sein Siao located?

Sein Siao practices at 14 Common St, Wrentham, MA 02093. The listed phone number is (508) 384-8136.

What is Sein Siao's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

Is Sein Siao enrolled in Medicare?

Yes. Sein Siao is registered in the Medicare PECOS enrollment system.

What insurance does Sein Siao accept?

Health plans from Anthem Blue Cross and Blue Sheld, Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and Blue Cross and Blue Shield of Texas list Sein Siao as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Sein Siao was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 25 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.