Mark Janczakowski, DDS
NPI 1881673812 · General Practice Dentistry · Lynnwood, WA
Enrolled with Medicare as Order and Referring Only - Oral Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Janczakowski, DDS is a General Practice Dentistry provider in Lynnwood, WA (NPI 1881673812).
Provider details
- NPI number
- 1881673812
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Credential
- DDS
- Sex
- Male
- Sole proprietor
- Yes
- License
- 7880 (WA)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% 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
Mailing address
Registry dates
- Enumerated
- 2006-01-10
- Last updated
- 2022-06-02
- Certified
- 2022-06-02
Frequently asked questions
- What is Mark Janczakowski's NPI number?
- Mark Janczakowski's National Provider Identifier (NPI) is 1881673812, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Janczakowski's specialty?
- Mark Janczakowski is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is Mark Janczakowski located?
- Mark Janczakowski's practice location on file with NPPES is 19320 40th Ave W Ste B, Lynnwood, WA 98036-4602.
- What is Mark Janczakowski's phone number?
- The practice phone number listed in the NPPES registry for Mark Janczakowski is (425) 771-9090.
- Does Mark Janczakowski accept Medicare?
- Mark Janczakowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Janczakowski's NPI active?
- Yes — Mark Janczakowski's NPI (1881673812) is active in the NPPES registry as of the last update on 2022-06-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.