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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

WILLIAM SEID DDS
NPI 1083613202
Dentist - General Practice in Pasadena, TX

Active since July 19, 2005Opted out of Medicare · through Apr 21, 2028
2009 JOHN ST, PASADENA, TX 77502(713) 473-6677(713) 473-6778 Get Directions Write a Review

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

About William Seid Dds NPPES

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

WILLIAM SEID DDS (NPI 1083613202) is an individual general practice provider in Pasadena, Texas, licensed in Texas (16458) and active in the NPI registry since July 2005. He has opted out of Medicare through April 21, 2028 and remains eligible to order and refer.

NPPES Registry Identity

NPI1083613202
Entity TypeIndividualMale
Primary Taxonomy1223G0001X
Provider Legal NameWILLIAM SEIDCredential: DDS
Location Address2009 JOHN STPasadena, TX 77502-3375
Mailing Address3411 Scenic Elm StHouston, TX 77059-3728 · (281) 488-6574
Phone(713) 473-6677
Fax(713) 473-6778
Sole ProprietorNo
Enumeration DateJuly 19, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1083613202 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers
Taxonomy Code1223G0001X
License✔ Licensed in TX · 16458
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.
2009 JOHN ST, Pasadena, TX 77502
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

William Seid Dds has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from April 21, 2016 through April 21, 2028.

Opt-Out Effective DateApril 21, 2016
Opt-Out In Effect ThroughApril 21, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77502 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
$90.40 typical visit price
range $58.24 – $176.98
Typical copayment $22.60 (range $14.56 – $44.24)
Most-billed visit code 99203
Established Patient
$72.62 typical visit price
range $18.60 – $143.93
Typical copayment $18.15 (range $4.65 – $35.98)
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 3

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

BARBARA SEID MOON D.D.S
Dentist (Pediatric Dentistry)
2009 JOHN ST
PASADENA, TX 77502
Harris County (713) 473-6677
JIMMY JOE MOON SR. D.D.S.
Dentist (General Practice)
2009 JOHN ST
PASADENA, TX 77502
Harris County (713) 473-6677
JIMMY JOE MOON, DDS & BARBARA SEID MOON, DDS, INC.
Clinic/Center (Dental)
2009 JOHN ST
PASADENA, TX 77502
Harris County (713) 473-6677

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 William Seid's NPI number?

The NPI number for William Seid is 1083613202. It was assigned to this individual provider in the NPPES registry on July 19, 2005.

Where is William Seid located?

William Seid practices at 2009 John St, Pasadena, TX 77502. The listed phone number is (713) 473-6677.

What is William Seid's specialty?

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

Is William Seid enrolled in Medicare?

No. William Seid has opted out of Medicare through April 21, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for William Seid 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 23 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.