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DR. STEVEN MARK WILLIAMS D.M.D.
NPI 1780867820
Dentist - Endodontics in Livermore, CA

Active since December 12, 2007PECOS Enrolled
999 E STANLEY BLVD, STE. C, LIVERMORE, CA 94550(925) 371-0300(925) 371-0800 Get Directions Write a Review

NPPES record last updated: December 12, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Steven Mark Williams D.m.d. NPPES

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

DR. STEVEN MARK WILLIAMS D.M.D. (NPI 1780867820) is an individual endodontics provider in Livermore, California, licensed in California (39912) and active in the NPI registry since December 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1780867820
Entity TypeIndividualMale
Primary Taxonomy1223E0200X
Provider Legal NameDR. STEVEN MARK WILLIAMSCredential: D.M.D.
Location Address999 E STANLEY BLVD, STE. CLivermore, CA 94550-4002
Mailing Address999 E Stanley Blvd, Ste. CLivermore, CA 94550-4002 · (925) 371-0300 · Fax (925) 371-0800
Phone(925) 371-0300
Fax(925) 371-0800
Sole ProprietorYes
Enumeration DateDecember 12, 2007
✔ NPI 1780867820 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · EndodonticsDental Providers
Taxonomy Code1223E0200X
License✔ Licensed in CA · 39912
Definition
The branch of dentistry that is concerned with the morphology, physiology and pathology of the human dental pulp and periradicular tissues. Its study and practice encompass the basic and clinical sciences including biology of the normal pulp, the etiology, diagnosis, prevention and treatment of diseases and injuries of the pulp and associated periradicular conditions.
999 E STANLEY BLVD, Livermore, CA 94550
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas 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. Steven Mark Williams D.m.d. 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 94550 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
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
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.

DR. HARLEY JILL WILLIAMS D.M.D.
Dentist (Periodontics)
999 E STANLEY BLVD
LIVERMORE, CA 94550
Alameda County (925) 371-0300
DR. MAX HSIAO DMD
Dentist (General Practice)
999 E STANLEY BLVD
LIVERMORE, CA 94550
Alameda County (925) 449-1141
DR. ANTHONY DAVID ALVAREZ DDS
Dentist
999 E STANLEY BLVD, SUITE A
LIVERMORE, CA 94550
Alameda County (925) 443-3443

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 Steven Williams's NPI number?

The NPI number for Steven Williams is 1780867820. It was assigned to this individual provider in the NPPES registry on December 12, 2007.

Where is Steven Williams located?

Steven Williams practices at 999 E Stanley Blvd Ste. C, Livermore, CA 94550. The listed phone number is (925) 371-0300.

What is Steven Williams's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Endodontics, with taxonomy code 1223E0200X.

Is Steven Williams enrolled in Medicare?

Yes. Steven Williams is registered in the Medicare PECOS enrollment system.

What insurance does Steven Williams accept?

Health plans from Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas, Humana and Renaissance Dental list Steven Williams 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 Steven Williams was last updated on December 12, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years 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.