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DR. KEITH ROGER GRONBACH D.D.S.
NPI 1992853204
Dentist - Oral and Maxillofacial Surgery in Lafayette, CA

Active since January 05, 2007Opted out of Medicare · through Oct 18, 2027
3799 MT DIABLO BLVD, LAFAYETTE, CA 94549(925) 283-4050(925) 283-5340 Get Directions Write a Review

NPPES record last updated: July 22, 2020. Verified against the NPPES registry weekly; last sync: August 23, 2026.

About Dr. Keith Roger Gronbach D.d.s. NPPES

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

DR. KEITH ROGER GRONBACH D.D.S. (NPI 1992853204) is an individual oral and maxillofacial surgery provider in Lafayette, California, licensed in California (44317) and active in the NPI registry since January 2007. He has opted out of Medicare through October 18, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1992853204
Entity TypeIndividualMale
Primary Taxonomy1223S0112X
Provider Legal NameDR. KEITH ROGER GRONBACHCredential: D.D.S.
Location Address3799 MT DIABLO BLVDLafayette, CA 94549-3538
Mailing Address3799 Mt Diablo BlvdLafayette, CA 94549-3538 · (925) 283-4050 · Fax (925) 283-5340
Phone(925) 283-4050
Fax(925) 283-5340
Sole ProprietorNo
Enumeration DateJanuary 5, 2007
Last NPPES UpdateJuly 22, 2020
NPPES CertifiedJuly 22, 2020
✔ NPI 1992853204 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 CA · 44317
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.
3799 MT DIABLO BLVD, Lafayette, CA 94549
Open in Google Maps ↗

Other Identifiers 1

Other94-1723333Federal Tin

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Florida Combined Life, Humana, UnitedHealthcare.Insurance ›

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. Keith Roger Gronbach D.d.s. 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 October 18, 2017 through October 18, 2027.

Opt-Out Effective DateOctober 18, 2017
Opt-Out In Effect ThroughOctober 18, 2027Opt-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 94549 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 2

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

KEITH R. GRONBACH, D.D.S., INC.
Dentist (Oral and Maxillofacial Surgery)
3799 MT DIABLO BLVD
LAFAYETTE, CA 94549
Contra Costa County (925) 283-4050
LEONARD MARIO SAPUTO MD
Internal Medicine
3799 MT DIABLO BLVD
LAFAYETTE, CA 94549
Contra Costa County (925) 962-3799

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 Keith Gronbach's NPI number?

The NPI number for Keith Gronbach is 1992853204. It was assigned to this individual provider in the NPPES registry on January 5, 2007.

Where is Keith Gronbach located?

Keith Gronbach practices at 3799 Mt Diablo Blvd, Lafayette, CA 94549. The listed phone number is (925) 283-4050.

What is Keith Gronbach's specialty?

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

Is Keith Gronbach enrolled in Medicare?

No. Keith Gronbach has opted out of Medicare through October 18, 2027. 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.

What insurance does Keith Gronbach accept?

Health plans from Florida Combined Life, Humana and UnitedHealthcare list Keith Gronbach 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 Keith Gronbach was last updated on July 22, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.