Cory L. Conniff, MD
Rheumatology Physician · Orland Park, IL
Cory L. Conniff, MD is a rheumatology physician with a practice address in Orland Park, Illinois, and NPI 1376539726, issued on Sep 21, 2005. Check the license (Illinois 036-107529, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Cory L. Conniff
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 036-107529 IL
Self-reported in NPPES; status is on the state search - Practice location
- 11540 183RD PL # NE-NW, Orland Park, IL 60467
- Phone
- (630) 339-5300
- Enumerated
- Sep 21, 2005
- Record last updated
- Nov 4, 2025
- Fax
- (630) 339-5305
- Medicaid ID
- 036-107-529 IL
- Medicare enrollment
- Enrolled (PECOS I20040501000340); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 340 in Illinois → Look up another NPI →
Verify Cory L. Conniff 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 036-107529Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% more Medicare Part D claims than the average rheumatology physician in 2024
2,451 Medicare Part D claims for 417 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. 162 claims were for opioids.
Most prescribed
- Methotrexate605 claims
- Prednisone278 claims
- Hydroxychloroquine Sulfate222 claims
- Allopurinol140 claims
- Tramadol Hcl115 claims
- Duloxetine Hcl104 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: $2,718.64
107 payments; by number, the most common kind was food and beverage; the largest payer was Amgen 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 2 group practices
- Greater Chicago Specialty Physicians LLCOakbrook Terrace, IL
- Insight Chicago IncChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cory L. Conniff among 340 rheumatology physician records in Illinois
Cory L. Conniff, MD is one of 340 rheumatology physician records with a practice address in Illinois. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1999 · median 2003 among the 244 with a school on file
- Record last updated2025 · 59% 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 Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Illinois
There are 340 rheumatology physician records in Illinois.
All 340 in Illinois → Every provider in Orland Park → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Sunil John, MDOrland Park, IL 604671427154665
- Claudia Vergara, M.D.Orland Park, IL 604671639325848
- Olga Vila-Sola, MDOrland Park, IL 604671396925137
- Charles Geringer, M.D.Palos Heights, IL 604631235195702
- Vinod Soni, M.D.Palos Heights, IL 604631467581801
- Fariha Kausar, MDOrland Park, IL 604621629035670
- Aravind Gopal, MDOlympia Fields, IL 604611386959302
- Joy Iskandar, D.O.South Holland, IL 604731841685724
Common questions
What is Cory L. Conniff, MD's NPI number?
Cory L. Conniff, MD's National Provider Identifier (NPI) is 1376539726, issued on Sep 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Cory L. Conniff, MD located?
The NPPES record lists a practice address at 11540 183RD PL # NE-NW, Orland Park, IL, 60467. Phone: (630) 339-5300. Providers update this record themselves, so call before visiting.
How can I verify Cory L. Conniff, MD's license?
NPPES lists Illinois license number 036-107529, 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 Cory L. Conniff, MD prescribe under Medicare Part D?
In 2024, Cory L. Conniff, MD had 2,451 Medicare Part D claims for 417 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.