Brett James Cassidy, MD
Obstetrics & Gynecology Physician · Yorkville, IL
Brett James Cassidy, MD is an obstetrics & gynecology physician with a practice address in Yorkville, Illinois, and NPI 1649256975, issued on Dec 19, 2005. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Brett James Cassidy
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- Practice location
- 654 W Veterans Parkway, Yorkville, IL 60560
- Phone
- (630) 553-3588
- Enumerated
- Dec 19, 2005
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (630) 553-3525
- Medicare enrollment
- Enrolled (PECOS I20071128000050); accepts Medicare assignment
- Medical or professional school
- Emory University School Of Medicine, 1998
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 654 W Veterans Parkway
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Julie Almodovar, P.T.Physical Therapist1346376183
- Beth Beaumont, P.TPhysical Therapist1487701967
- Robin Morrice, DPTPhysical Therapist1902192958
- Thomas Rappette, DPMPodiatrist1962579904
Verify Brett James Cassidy 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
14% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
142 Medicare Part D claims for 47 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 23 claims were for opioids.
Most prescribed
- Fluconazole22 claims
- Ibuprofen22 claims
- Oxycodone Hcl20 claims
- Valacyclovir12 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: $73.21
3 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 21,429 providers of this specialty with any payment received $1,030.61 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
- Osf Multi-Specialty GroupOttawa, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Obstetrics & Gynecology Physician providers in Illinois
There are 2,062 obstetrics & gynecology physician records in Illinois.
Other obstetrics & gynecology physician records in Illinois
- Anum Abbasi, MDChicago, IL1679063010
- Diane Abdel-Barry, M.D.Chicago, IL1508205808
- Rana Abdul-Khalek, MDRoscoe, IL1275768087
- Idries Abdur-Rahman, M.D.Ottawa, IL1891727236
- Jamil Abdur-Rahman, M.D.Gurnee, IL1710914189
- Bassel Abouzeid, MDPeoria, IL1376160846
- Ashley Abraham, M.D.Arlington Heights, IL1457615742
- Iris Abrahantes Morales, MDChicago, IL1164155164
- Fidel Abrego, MDChicago, IL1245351824
- Bayan AbunarAurora, IL1972063220
Common questions
What is Brett James Cassidy, MD's NPI number?
Brett James Cassidy, MD's National Provider Identifier (NPI) is 1649256975, issued on Dec 19, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Brett James Cassidy, MD located?
The NPPES record lists a practice address at 654 W Veterans Parkway, Yorkville, IL, 60560. Phone: (630) 553-3588. Providers update this record themselves, so call before visiting.
How can I verify Brett James Cassidy, MD'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 Brett James Cassidy, MD prescribe under Medicare Part D?
In 2024, Brett James Cassidy, MD had 142 Medicare Part D claims for 47 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.