1. Home
  2. Directory
  3. Connecticut
  4. Waterbury
  5. Dentist
  6. NPI Profile

GREATER WATERBURY ORAL & MAXILLOFACIAL SURGEONS LLC
NPI 1033136825
Dentist - Oral and Maxillofacial Surgery in Waterbury, CT

Active since July 16, 2006
1389 W MAIN ST, SUITE 320, WATERBURY, CT 06708(203) 573-1427(203) 574-2460 Get Directions Write a Review

NPPES record last updated: April 9, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Greater Waterbury Oral & Maxillofacial Surgeons Llc NPPES

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

GREATER WATERBURY ORAL & MAXILLOFACIAL SURGEONS LLC (NPI 1033136825) is a healthcare organization registered as an oral and maxillofacial surgery in Waterbury, Connecticut and active in the NPI registry since July 2006. The organization lists John J Hillgen, Owner, as its authorized official.

NPPES Registry Identity

NPI1033136825
Entity TypeOrganization
Primary Taxonomy1223S0112X
Legal Business NameGREATER WATERBURY ORAL & MAXILLOFACIAL SURGEONS LLC
Location Address1389 W MAIN ST, SUITE 320Waterbury, CT 06708-3104
Mailing Address1389 W Main St, Suite 320Waterbury, CT 06708-3104 · (203) 573-1427 · Fax (203) 574-2460
Phone(203) 573-1427
Fax(203) 574-2460
Organization SubpartNo
Authorized OfficialJohn J HillgenOwner · (203) 573-1427
Enumeration DateJuly 16, 2006
Last NPPES UpdateApril 9, 2015
✔ NPI 1033136825 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · Oral and Maxillofacial SurgeryDental Providers
Taxonomy Code1223S0112X
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.
1389 W MAIN ST, Waterbury, CT 06708
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Greater Waterbury Oral & Maxillofacial Surgeons Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Greater Waterbury Oral & Maxillofacial Surgeons LLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

John Hillgen, D.M.D.
Oral Surgery
NPI 1538193370
1389 W MAIN ST SUITE 320
Waterbury, CT 06708
(203) 573-1427
✔ PECOSSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Greater Waterbury Oral & Maxillofacial Surgeons LLC's NPI number?

The NPI number for Greater Waterbury Oral & Maxillofacial Surgeons LLC is 1033136825. It was assigned to this organization in the NPPES registry on July 16, 2006.

Where is Greater Waterbury Oral & Maxillofacial Surgeons LLC located?

Greater Waterbury Oral & Maxillofacial Surgeons LLC is located at 1389 W Main St Suite 320, Waterbury, CT 06708. The listed phone number is (203) 573-1427.

What is Greater Waterbury Oral & Maxillofacial Surgeons LLC's specialty?

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

Is Greater Waterbury Oral & Maxillofacial Surgeons LLC enrolled in Medicare?

Yes. Greater Waterbury Oral & Maxillofacial Surgeons LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Greater Waterbury Oral & Maxillofacial Surgeons LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Oral Surgery) reassigns their Medicare billing to Greater Waterbury Oral & Maxillofacial Surgeons LLC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Greater Waterbury Oral & Maxillofacial Surgeons LLC was last updated on April 9, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.