NPPES file of Aug 9, 2026

William Douglas Havlik, DMD

Dentist · Sullivan, IL

William Douglas Havlik, DMD is a dentist with a practice address in Sullivan, Illinois, and NPI 1235241001, issued on Aug 31, 2006. Check the license with the Illinois board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1235241001
Name
William Douglas Havlik
Credential
DMD
Primary taxonomy
Dentist 122300000X
Practice location
2 West Adams, Sullivan, IL 61951
Phone
(217) 728-8711
Enumerated
Aug 31, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(217) 728-2580
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Verify William Douglas Havlik in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this professionCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
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2 dentist records list a practice address in Sullivan

They are 2 of the 79 NPPES records with a practice address in Sullivan, and 4,522 dentist records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 2 in Sullivan → All 4,522 in Illinois → Every provider in Sullivan →

Other dentist records in Illinois

  1. Naailah Aaishah, DMDChicago, IL1770404774
  2. Juan Abadia, D.D.S.Wheeling, IL1619389681
  3. Gilbert Abadilla, DDSBloomingdale, IL1710003686
  4. Marwan Abbas, DMDChicago, IL1912490749
  5. David Abbott, D.D.S.Wheaton, IL1114133733
  6. Abdallah AbboudChicago, IL1962702068
  7. Nancy Abdala, D.D.S.Chicago, IL1467682302
  8. Fathi Abdallah, DMDOak Lawn, IL1447827225
  9. Ghassan Abdallah, DMDOak Lawn, IL1720179021
  10. Housam Abdallah, DMDJoliet, IL1811673973

Common questions

What is William Douglas Havlik, DMD's NPI number?

William Douglas Havlik, DMD's National Provider Identifier (NPI) is 1235241001, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.

Where is William Douglas Havlik, DMD located?

The NPPES record lists a practice address at 2 West Adams, Sullivan, IL, 61951. Phone: (217) 728-8711. Providers update this record themselves, so call before visiting.

How can I verify William Douglas Havlik, DMD's license?

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.