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DR. GREGORY P WILLIAMS DDS
NPI 1720126220
Dentist - Oral and Maxillofacial Surgery in Rapid City, SD

Active since February 05, 2007Opted out of Medicare · through Apr 24, 2028
330 E STUMER RD, RAPID CITY, SD 57701(605) 348-3400(605) 348-1626 Get Directions Write a Review

NPPES record last updated: June 28, 2016. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Gregory P Williams Dds NPPES

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

DR. GREGORY P WILLIAMS DDS (NPI 1720126220) is an individual oral and maxillofacial surgery provider in Rapid City, South Dakota, licensed in South Dakota (M808) and active in the NPI registry since February 2007. He has opted out of Medicare through April 24, 2028.

NPPES Registry Identity

NPI1720126220
Entity TypeIndividualMale
Primary Taxonomy1223S0112X
Provider Legal NameDR. GREGORY P WILLIAMSCredential: DDS
Location Address330 E STUMER RDRapid City, SD 57701-6406
Mailing Address330 E Stumer RdRapid City, SD 57701-6406 · (605) 348-3400 · Fax (605) 348-1626
Phone(605) 348-3400
Fax(605) 348-1626
Sole ProprietorYes
Enumeration DateFebruary 5, 2007
Last NPPES UpdateJune 28, 2016
✔ NPI 1720126220 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · Oral and Maxillofacial SurgeryDental Providers
Taxonomy Code1223S0112X
License✔ Licensed in SD · M808
Definition
An oral and maxillofacial surgery dentist specialized in the diagnosis, surgical and adjunctive treatment of diseases, injuries and defects involving both the functional and esthetic aspects of the hard and soft tissues of the oral and maxillofacial region.
330 E STUMER RD, Rapid City, SD 57701
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Other Identifiers 3

Medicaid8000390SD
Medicare UPINU50866SD
Medicare ID-Type Unspecified3519SD

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Gregory P Williams 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 24, 2024 through April 24, 2028.

Opt-Out Effective DateApril 24, 2024
Opt-Out In Effect ThroughApril 24, 2028Opt-out affidavits renew automatically every two years unless cancelled

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.

WILLIAMS ORAL AND MAXILLOFACIAL SURGERY, PROF. L.L.C.
Dentist (Oral and Maxillofacial Surgery)
330 E STUMER RD
RAPID CITY, SD 57701
Meade County (605) 348-3400
WILLIAMS ORAL AND MAXILLOFACIAL SURGERY
Clinic/Center (Oral and Maxillofacial Surgery)
330 E STUMER RD
RAPID CITY, SD 57701
Meade County (605) 348-3400
RAPID CITY ORAL SURGERY PROF LLC
Oral & Maxillofacial Surgery
330 E STUMER RD
RAPID CITY, SD 57701
Meade County (605) 348-3400

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 Gregory Williams's NPI number?

The NPI number for Gregory Williams is 1720126220. It was assigned to this individual provider in the NPPES registry on February 5, 2007.

Where is Gregory Williams located?

Gregory Williams practices at 330 E Stumer Rd, Rapid City, SD 57701. The listed phone number is (605) 348-3400.

What is Gregory Williams's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Oral and Maxillofacial Surgery, with taxonomy code 1223S0112X.

Is Gregory Williams enrolled in Medicare?

No. Gregory Williams has opted out of Medicare through April 24, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

When was this NPI record last updated?

The NPPES record for Gregory Williams was last updated on June 28, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.