Ilias Oikonomopoulos, M.D.
Rheumatology Physician · Madison, WI
Ilias Oikonomopoulos, M.D. is a rheumatology physician with a practice address in Madison, Wisconsin, and NPI 1639334832, issued on Jul 28, 2008. Check the license (Wisconsin 70464-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Ilias Oikonomopoulos
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 70464-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1821 S Stoughton RD, Madison, WI 53716
- Phone
- (608) 260-6000
- Enumerated
- Jul 28, 2008
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (608) 260-6855
- Medicaid ID
- 1639334832 WI
- Medicare enrollment
- Enrolled (PECOS I20190905001608); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 154 in Wisconsin → Look up another NPI →
Also registered at 1821 S Stoughton RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Alt, MDInternal Medicine Physician1578500872
- Darcey Amundson, PA-CPhysician Assistant1588691398
- Richard Armstrong, MDInternal Medicine Physician1689774523
- Wendy Arrington, O.D.Optometrist1750394334
- Bhawani Ballamudi, M.D.Psychiatry Physician1831148691
- Zachary Barber, PTPhysical Therapist1609054212
Verify Ilias Oikonomopoulos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 70464-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% more Medicare Part D claims than the average rheumatology physician in 2024
2,585 Medicare Part D claims for 392 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 150 claims were for opioids.
Most prescribed
- Prednisone586 claims
- Methotrexate445 claims
- Hydroxychloroquine Sulfate336 claims
- Alendronate Sodium141 claims
- Humira(Cf) Pen85 claims
- Allopurinol71 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: $59.52
1 payment: food and beverage; the largest payer was Janssen Biotech, Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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
- Dean Health Systems IncMadison, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ilias Oikonomopoulos among 154 rheumatology physician records in Wisconsin
Ilias Oikonomopoulos, M.D. is one of 154 rheumatology physician records with a practice address in Wisconsin. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 62% of them.
- NPI issued2008 · 62% of these records are older, 34% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2004 · median 2004 among the 97 with a school on file
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Wisconsin
There are 154 rheumatology physician records in Wisconsin.
All 154 in Wisconsin → Every provider in Madison → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Jilaine Bolek Berquist, M.D.Madison, WI 537161346208766
- Jenna McGoldrick, M.D.Madison, WI 537161821415894
- Zachary Pruhs, M.D.Madison, WI 537161760537641
- Steven Szlembarski, DOMadison, WI 537161760011928
- Nguyet-Anh Tran, MDMadison, WI 537161447442355
- Jon Arnason, MDMadison, WI 537171265760433
- Christie Bartels, M.D.Madison, WI 537171093770422
- Carolyn Bell, MDMadison, WI 537171609843226
Common questions
What is Ilias Oikonomopoulos, M.D.'s NPI number?
Ilias Oikonomopoulos, M.D.'s National Provider Identifier (NPI) is 1639334832, issued on Jul 28, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Ilias Oikonomopoulos, M.D. located?
The NPPES record lists a practice address at 1821 S Stoughton RD, Madison, WI, 53716. Phone: (608) 260-6000. Providers update this record themselves, so call before visiting.
How can I verify Ilias Oikonomopoulos, M.D.'s license?
NPPES lists Wisconsin license number 70464-20, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ilias Oikonomopoulos, M.D. prescribe under Medicare Part D?
In 2024, Ilias Oikonomopoulos, M.D. had 2,585 Medicare Part D claims for 392 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.