Mark A. Janczakowski, DDS
General Practice Dentistry · Lynnwood, WA
Mark A. Janczakowski, DDS is a general practice dentistry with a practice address in Lynnwood, Washington, and NPI 1881673812, issued on Jan 10, 2006. Check the license (Washington 7880, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark A. Janczakowski
- Credential
- DDS
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 7880 WA
Self-reported in NPPES; status is on the state search - Practice location
- 19320 40TH Ave W Ste B, Lynnwood, WA 98036
- Phone
- (425) 771-9090
- Enumerated
- Jan 10, 2006
- Record last updated
- Jun 2, 2022
- Fax
- (425) 775-1549
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 3,196 in Washington → Look up another NPI →
Also registered at 19320 40TH Ave W Ste B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hyunseo ParkDentist1043529456
Verify Mark A. Janczakowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license 7880Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average general practice dentistry in 2024
12 Medicare Part D claims, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Mark A. Janczakowski among 3,196 general practice dentistry records in Washington
Mark A. Janczakowski, DDS is one of 3,196 general practice dentistry records with a practice address in Washington. 57% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 59% newer
- In a Medicare fileYes · 57% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2022 · 72% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
50 general practice dentistry records list a practice address in Lynnwood
They are 50 of the 2,501 NPPES records with a practice address in Lynnwood, and 3,196 general practice dentistry records in Washington.
All 3,196 in Washington → Every provider in Lynnwood → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Marissa Bender, DMD, MBALynnwood, WA 980361215988050
- Timothy Cliney, D.D.S.Lynnwood, WA 980361558341008
- Collins Donoghue, D.D.S.Lynnwood, WA 980361740369701
- Mark Hetzer, DDSLynnwood, WA 980361457330490
- Jung Hoon Kim, D.D.S.Lynnwood, WA 980361366420002
- Pascal Lee, D.D.S.Lynnwood, WA 980361972683860
- Danh Luu, DDSLynnwood, WA 980361144306838
- Ashifa Nurani, DDSLynnwood, WA 980361801962980
Common questions
What is Mark A. Janczakowski, DDS's NPI number?
Mark A. Janczakowski, DDS's National Provider Identifier (NPI) is 1881673812, issued on Jan 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Janczakowski, DDS located?
The NPPES record lists a practice address at 19320 40TH Ave W Ste B, Lynnwood, WA, 98036. Phone: (425) 771-9090. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Janczakowski, DDS's license?
NPPES lists Washington license number 7880, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Mark A. Janczakowski, DDS prescribe under Medicare Part D?
In 2024, Mark A. Janczakowski, DDS had 12 Medicare Part D claims; the average among general practice dentistry prescribers was 83. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.