What is Roger Sienkiewicz's NPI number?

Roger Sienkiewicz's National Provider Identifier (NPI) is 1134253107, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Roger Sienkiewicz's specialty?

Roger Sienkiewicz is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).

Where is Roger Sienkiewicz located?

Roger Sienkiewicz's practice location on file with NPPES is 8021 W 79th St, Justice, IL 60458-1607.

What is Roger Sienkiewicz's phone number?

The practice phone number listed in the NPPES registry for Roger Sienkiewicz is (708) 458-7766.

Is Roger Sienkiewicz's NPI active?

Yes — Roger Sienkiewicz's NPI (1134253107) is active in the NPPES registry as of the last update on 2026-05-24.

IndividualActive

Roger Sienkiewicz, DDS

NPI 1134253107 · General Practice Dentistry · Justice, IL

Roger Sienkiewicz, DDS is a General Practice Dentistry provider in Justice, IL (NPI 1134253107).

Provider details

NPI number: 1134253107
Entity type: Individual
Primary specialty: General Practice DentistryDental Providers
Credential: DDS
Sex: Male
Sole proprietor: Yes

Specialties & taxonomies

General Practice DentistryPrimary1223G0001X
Dental Providers

Profile Score

Detailed profile(83/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
19 yrs in NPPES registry
Profile completeness38% of score
83% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

8021 W 79th St

Justice, IL 60458-1607

Phone: (708) 458-7766

Street-level locationGet directions

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Mailing address