William P. Sullivan, D.O.
Emergency Medicine Physician · Frankfort, IL
William P. Sullivan, D.O. is an emergency medicine physician with a practice address in Frankfort, Illinois, and NPI 1902911027, issued on Aug 20, 2006. Check the license (Illinois 036088666, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- William P. Sullivan
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 036088666 IL
02001489A IN
Self-reported in NPPES; status is on the state search - Practice location
- 21200 S LA Grange RD # 365, Frankfort, IL 60423
- Phone
- (877) 778-5449
- Enumerated
- Aug 20, 2006
- Record last updated
- Mar 14, 2025
- Fax
- (877) 778-5449
- Medicare enrollment
- Enrolled (PECOS I20040309000923); accepts Medicare assignment
- Medical or professional school
- New York College Of Osteo Medicine Of New York Institute Of Technology, 1992
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Verify William P. Sullivan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036088666Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% more Medicare Part D claims than the average emergency medicine physician in 2024
257 Medicare Part D claims for 181 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 62 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen30 claims
- Ondansetron Hcl24 claims
- Levofloxacin23 claims
- Acetaminophen-Codeine17 claims
- Methylprednisolone14 claims
- Sulfamethoxazole-Trimethoprim12 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: $105.66
1 payment: food and beverage; the largest payer was Abbott Laboratories. The 12,335 providers of this specialty with any payment received $953.79 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.
Bills Medicare through 2 group practices
- Osf Multi-Specialty GroupOttawa, IL
- Rochelle Community Hospital AssociationRochelle, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William P. Sullivan among 3,291 emergency medicine physician records in Illinois
William P. Sullivan, D.O. is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 68% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1992 · median 2012 among the 1,867 with a school on file
- Record last updated2025 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Illinois
There are 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Frankfort → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Ayoola Awofadeju, MDFlossmoor, IL 604221760423461
- Kia Boxley-Gillespie, MDFlossmoor, IL 604221477655686
- Aziz Abed, M.D.Harvey, IL 604261477874154
- John Baldwin, DOHarvey, IL 604261386022432
- Bernard Heilicser, D.O.Harvey, IL 604261750416152
- Atul Joshi, D.O.Harvey, IL 604261437361722
- Anna Lin, D.OHarvey, IL 604261366948820
- Rosemary Matossian, MDHarvey, IL 604261053999060
Common questions
What is William P. Sullivan, D.O.'s NPI number?
William P. Sullivan, D.O.'s National Provider Identifier (NPI) is 1902911027, issued on Aug 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William P. Sullivan, D.O. located?
The NPPES record lists a practice address at 21200 S LA Grange RD # 365, Frankfort, IL, 60423. Phone: (877) 778-5449. Providers update this record themselves, so call before visiting.
How can I verify William P. Sullivan, D.O.'s license?
NPPES lists Illinois license number 036088666, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William P. Sullivan, D.O. prescribe under Medicare Part D?
In 2024, William P. Sullivan, D.O. had 257 Medicare Part D claims for 181 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.