William John Bull, MD
Specialist · Naperville, IL
William John Bull, MD is a specialist with a practice address in Naperville, Illinois, and NPI 1417956947, issued on Jul 18, 2005. Check the license (Illinois 036102621, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William John Bull
- Credential
- MD
- Primary taxonomy
- Specialist 174400000X
- License number
- 036102621 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1307 Macom Dr, Naperville, IL 60564
- Phone
- (630) 717-6000
- Enumerated
- Jul 18, 2005
- Record last updated
- Sep 28, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (630) 717-6777
- Medicaid ID
- 036102621 IL
- Entity
- Type 1 · individual
8 nearest specialist records → All 1,154 in Illinois → Look up another NPI →
Verify William John Bull in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 036102621Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average specialist in 2024
51 Medicare Part D claims for 13 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. 18 claims were for opioids.
Most prescribed
- Oxycodone Hcl13 claims
- Cephalexin11 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: $351.27
9 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 5,844 providers of this specialty with any payment received $4,760.79 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.
William John Bull among 1,154 specialist records in Illinois
William John Bull, MD is one of 1,154 specialist records with a practice address in Illinois. 19% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 19% of these records are
- In the CMS Doctors and Clinicians fileNo · 11% of these records are
- Record last updated2010 · 84% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in Illinois
There are 1,154 specialist records in Illinois.
All 1,154 in Illinois → Every provider in Naperville → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Beverly Miles-WashingtonNaperville, IL 605641821341322
- Raymond Ogren, A.T.C.Naperville, IL 605641902882640
- Teresita Patino, DEVELOPMENTAL THERAPNaperville, IL 605641174574909
- Mary Roy, M.D.Naperville, IL 605641477679025
- Louis Serpico, MDNaperville, IL 605631508948902
- Janet Talmadge, IBCLCNaperville, IL 605651801002654
- Patricia VandercarNaperville, IL 605651588874937
- Carrie Crozier-Arena, PHYSICAL THERAPISTDarien, IL 605611154657732
Common questions
What is William John Bull, MD's NPI number?
William John Bull, MD's National Provider Identifier (NPI) is 1417956947, issued on Jul 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William John Bull, MD located?
The NPPES record lists a practice address at 1307 Macom Dr, Naperville, IL, 60564. Phone: (630) 717-6000. Providers update this record themselves, so call before visiting.
How can I verify William John Bull, MD's license?
NPPES lists Illinois license number 036102621, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does William John Bull, MD prescribe under Medicare Part D?
In 2024, William John Bull, MD had 51 Medicare Part D claims for 13 beneficiaries; the average among specialist prescribers was 1,380. 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.