Sean Cahill, MD
Internal Medicine Physician · Naperville, IL
Sean Cahill, MD is an internal medicine physician with a practice address in Naperville, Illinois, and NPI 1801862206, issued on Feb 24, 2006. Check the license (Illinois 36105864, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Sean Cahill
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 36105864 IL
Self-reported in NPPES; status is on the state search - Practice location
- 636 Raymond Dr, Naperville, IL 60563
- Phone
- (630) 355-5302
- Enumerated
- Feb 24, 2006
- Entity
- Type 1 · individual
Also registered at 636 Raymond Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Sean Cahill 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 36105864Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
20% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,241 Medicare Part D claims for 321 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 17 claims were for opioids.
Most prescribed
- Atorvastatin Calcium262 claims
- Amlodipine Besylate164 claims
- Lisinopril144 claims
- Losartan Potassium127 claims
- Hydrochlorothiazide104 claims
- Levothyroxine Sodium69 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: $212.25
6 payments, mostly food and beverage; the largest payer was Novo Nordisk Inc. The 65,274 providers of this specialty with any payment received $2,536.66 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.
113 internal medicine physician records list a Naperville practice address
They are 113 of the 4,634 NPPES records with a Naperville practice address, and 8,522 internal medicine physician records in Illinois.
All 113 in Naperville → All 8,522 in Illinois → Every provider in Naperville →
Other internal medicine physician records in Illinois
- Peter Abadeer, D.O.Bloomington, IL1760469522
- Pamela Abadi, D.O.Winfield, IL1588820179
- Motaz Abas, MDPeoria, IL1215510201
- Elias Abate, M.D.Chicago, IL1336712199
- Maliha Abbas, D.O.Chicago, IL1174963920
- Zareena Abbas, MDChicago, IL1427078872
- Abu Abbasi, MDChicago, IL1083243877
- Ayesha Abbasi, MDChicago, IL1376216705
- Khalda Abbasi, MDNaperville, IL1487705240
- Misha Abbasi, MDChicago, IL1770111635
Common questions
What is Sean Cahill, MD's NPI number?
Sean Cahill, MD's National Provider Identifier (NPI) is 1801862206, issued on Feb 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sean Cahill, MD located?
The NPPES record lists a practice address at 636 Raymond Dr, Naperville, IL, 60563. Phone: (630) 355-5302. Providers update this record themselves, so call before visiting.
How can I verify Sean Cahill, MD's license?
NPPES lists Illinois license number 36105864, 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 Sean Cahill, MD prescribe under Medicare Part D?
In 2024, Sean Cahill, MD had 2,241 Medicare Part D claims for 321 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.