Mark Sefcheck, D.D.S.
Dentist · Naperville, IL
Mark Sefcheck, D.D.S. is a dentist with a practice address in Naperville, Illinois, and NPI 1558509497, issued on Jan 30, 2009. Check the license (Illinois 019015718, as entered in NPPES) with the Illinois board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Sefcheck
- Credential
- D.D.S.
- Primary taxonomy
- Dentist 122300000X
- License number
- 019015718 IL
Self-reported in NPPES; status is on the state search - Practice location
- 129 N Washington St, Naperville, IL 60540
- Phone
- (630) 961-1048
- Enumerated
- Jan 30, 2009
- Record last updated
- Jan 30, 2009 (not updated in 17 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Also registered at 129 N Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marcia Sefcheck, D.D.S.Orthodontics and Dentofacial Orthopedics Dentistry1427329317
Verify Mark Sefcheck in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 019015718Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73 dentist records list a practice address in Naperville
They are 73 of the 4,634 NPPES records with a practice address in Naperville, and 4,522 dentist records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 73 in Naperville → All 4,522 in Illinois → Every provider in Naperville →
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- Ghassan Abdallah, DMDOak Lawn, IL1720179021
- Housam Abdallah, DMDJoliet, IL1811673973
Common questions
What is Mark Sefcheck, D.D.S.'s NPI number?
Mark Sefcheck, D.D.S.'s National Provider Identifier (NPI) is 1558509497, issued on Jan 30, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mark Sefcheck, D.D.S. located?
The NPPES record lists a practice address at 129 N Washington St, Naperville, IL, 60540. Phone: (630) 961-1048. Providers update this record themselves, so call before visiting.
How can I verify Mark Sefcheck, D.D.S.'s license?
NPPES lists Illinois license number 019015718, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity 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. 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.