Arthur L. Ostrowski, M.D.
Internal Medicine Physician · Barrington, IL
Arthur L. Ostrowski, M.D. is an internal medicine physician with a practice address in Barrington, Illinois, and NPI 1740257062, issued on Mar 6, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Arthur L. Ostrowski
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 800 Fox Gln, Barrington, IL 60010
- Phone
- (847) 382-5850
- Enumerated
- Mar 6, 2006
- Record last updated
- Oct 18, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (847) 382-5852
- Medicare enrollment
- Enrolled (PECOS I20050519001047); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 800 Fox Gln
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Eva Ostrowski, M.D.Internal Medicine Physician1225005820
Verify Arthur L. Ostrowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% more Medicare Part D claims than the average internal medicine physician in 2024
3,376 Medicare Part D claims for 154 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 23 claims were for opioids.
Most prescribed
- Atorvastatin Calcium238 claims
- Lisinopril236 claims
- Rosuvastatin Calcium180 claims
- Pantoprazole Sodium122 claims
- Levothyroxine Sodium107 claims
- Amlodipine Besylate81 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: $1,093.74
38 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Arthur L. Ostrowski among 7,238 internal medicine physician records in Illinois
Arthur L. Ostrowski, M.D. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1982 · median 2003 among the 3,580 with a school on file
- Record last updated2007 · 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 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 internal medicine physician records list a practice address in Barrington
They are 17 of the 756 NPPES records with a practice address in Barrington, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Barrington → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Roseann Brady, D.O.North Barrington, IL 600101477604106
- Melinda Einfalt, MDBarrington, IL 600101821084393
- Behzad Farah, MDBarrington, IL 600101689630915
- Rachel George, MD, MBASouth Barrington, IL 600101639109002
- John Gong, MDBarrington, IL 600101962414623
- Galina Goode, M.D.Barrington, IL 600101336209618
- Shahid Ilahi, M.D.Lake Barrington, IL 600101508867078
- Leo Kelly, M.D.Barrington, IL 600101386704666
Common questions
What is Arthur L. Ostrowski, M.D.'s NPI number?
Arthur L. Ostrowski, M.D.'s National Provider Identifier (NPI) is 1740257062, issued on Mar 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Arthur L. Ostrowski, M.D. located?
The NPPES record lists a practice address at 800 Fox Gln, Barrington, IL, 60010. Phone: (847) 382-5850. Providers update this record themselves, so call before visiting.
How can I verify Arthur L. Ostrowski, M.D.'s license?
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 Arthur L. Ostrowski, M.D. prescribe under Medicare Part D?
In 2024, Arthur L. Ostrowski, M.D. had 3,376 Medicare Part D claims for 154 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.