William C. Holohan, D.D.S.
Dentist · Northbrook, IL
William C. Holohan, D.D.S. is a dentist with a practice address in Northbrook, Illinois, and NPI 1396893053, issued on Jan 8, 2007. Check the license with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William C. Holohan
- Credential
- D.D.S.
- Primary taxonomy
- Dentist 122300000X
- Practice location
- 1220 Meadow RD, Northbrook, IL 60062
- Phone
- (847) 272-1588
- Enumerated
- Jan 8, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (847) 272-0581
- Entity
- Type 1 · individual
Also registered at 1220 Meadow RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Thomas Downey, DDSDentist1588639132
- John Formeller, DDSDentist1952455107
- Kimberly Garwacki, D.D.S.Dentist1457562217
- Colleen Holohan, D.D.S.Dentist1093863656
- Mark Humenik, DDS, PCGeneral Practice Dentistry1619093952
- Marita Janzen, DDS MSOrthodontics and Dentofacial Orthopedics Dentistry1255414264
Verify William C. Holohan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average dentist in 2024
24 Medicare Part D claims for 20 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin20 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.
Industry payments in 2024: $22.03
2 payments; by number, the most common kind was food and beverage; the largest payer was Align Technology, Inc. The 31,974 providers of this specialty with any payment received $540.36 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
19 dentist records list a practice address in Northbrook
They are 19 of the 2,226 NPPES records with a practice address in Northbrook, and 4,522 dentist records in Illinois.
All 19 in Northbrook → All 4,522 in Illinois → Every provider in Northbrook →
Other dentist records in Illinois
- Naailah Aaishah, DMDChicago, IL1770404774
- Juan Abadia, D.D.S.Wheeling, IL1619389681
- Gilbert Abadilla, DDSBloomingdale, IL1710003686
- Marwan Abbas, DMDChicago, IL1912490749
- David Abbott, D.D.S.Wheaton, IL1114133733
- Abdallah AbboudChicago, IL1962702068
- Nancy Abdala, D.D.S.Chicago, IL1467682302
- Fathi Abdallah, DMDOak Lawn, IL1447827225
- Ghassan Abdallah, DMDOak Lawn, IL1720179021
- Housam Abdallah, DMDJoliet, IL1811673973
Common questions
What is William C. Holohan, D.D.S.'s NPI number?
William C. Holohan, D.D.S.'s National Provider Identifier (NPI) is 1396893053, issued on Jan 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William C. Holohan, D.D.S. located?
The NPPES record lists a practice address at 1220 Meadow RD, Northbrook, IL, 60062. Phone: (847) 272-1588. Providers update this record themselves, so call before visiting.
How can I verify William C. Holohan, D.D.S.'s license?
Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does William C. Holohan, D.D.S. prescribe under Medicare Part D?
In 2024, William C. Holohan, D.D.S. had 24 Medicare Part D claims for 20 beneficiaries; the average among dentist prescribers was 86. 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.