John Davis, M.D.
Adolescent Medicine (Internal Medicine) Physician · Oak Brook, IL
John Davis, M.D. is an adolescent medicine (internal medicine) physician with a practice address in Oak Brook, Illinois, and NPI 1154363372, issued on Jun 12, 2006. Check the license (Illinois 036109720, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John Davis
- Credential
- M.D.
- Primary taxonomy
- Adolescent Medicine (Internal Medicine) Physician 207RA0000X
- License numbers
- 036109720 IL
01073739A IN
Self-reported in NPPES; status is on the state search - Practice location
- 900 Jorie Blvd, Oak Brook, IL 60523
- Phone
- (630) 954-6700
- Enumerated
- Jun 12, 2006
- Record last updated
- Nov 16, 2022
- Fax
- (630) 954-1555
- Medicaid ID
- 036109720 IL
- Medicare enrollment
- Enrolled (PECOS I20140416002475); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 900 Jorie Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ghanshyam Agarwal, MDNeonatal-Perinatal Medicine Physician1932141777
- Pablo Arnecilla, M.D.Pediatrics Physician1841237401
- Harley Brooks, M.D.Adolescent Medicine (Internal Medicine) Physician1326080177
- Kevin Connolly, D.C.Chiropractor1073731808
- Marcia Dawson, M.D.Neonatal-Perinatal Medicine Physician1689611147
- Camille Dicostanzo, NNPNeonatal Nurse Practitioner1306884952
Verify John Davis 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 036109720Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average adolescent medicine (internal medicine) physician in 2024
338 Medicare Part D claims for 138 beneficiaries, against an average of 3,639 among the 177 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium23 claims
- Clopidogrel14 claims
- Eliquis14 claims
- Furosemide14 claims
- Amlodipine Besylate12 claims
- Sucralfate12 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: $179.50
3 payments; by number, the most common kind was food and beverage; the largest payer was Inari Medical, Inc. The 96 providers of this specialty with any payment received $515.93 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 one group practice
- Galen Inpatient Physicians PCTerre Haute, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Adolescent Medicine (Internal Medicine) Physician providers in Illinois
There are 13 adolescent medicine (internal medicine) physician records in Illinois.
Other adolescent medicine (internal medicine) physician records in Illinois
- Anne Borwick, D.O.Fairview Heights, IL1326032046
- Harley Brooks, M.D.Oak Brook, IL1326080177
- Elizabeth Carazo, M.D.Mt Prospect, IL1922140300
- Asim Elmahboub, M.D.Greenville, IL1316984859
- Nancy Field, D.O.Oak Brook, IL1427090653
- Syed Ghani, M.DMcHenry, IL1205877396
- Peter Joo, M.D.Melrose Park, IL1336181197
- Surabhi Mehrotra, M.D.Chicago, IL1447297890
- Christina Nulty, M.D.Peoria, IL1114142643
- Elisa Scott, M.D.Oak Brook, IL1912949181
Common questions
What is John Davis, M.D.'s NPI number?
John Davis, M.D.'s National Provider Identifier (NPI) is 1154363372, issued on Jun 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Davis, M.D. located?
The NPPES record lists a practice address at 900 Jorie Blvd, Oak Brook, IL, 60523. Phone: (630) 954-6700. Providers update this record themselves, so call before visiting.
How can I verify John Davis, M.D.'s license?
NPPES lists Illinois license number 036109720, 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 John Davis, M.D. prescribe under Medicare Part D?
In 2024, John Davis, M.D. had 338 Medicare Part D claims for 138 beneficiaries; the average among adolescent medicine (internal medicine) physician prescribers was 3,639. 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.