Thomas L. Cao, MD
Hematology & Oncology Physician · Elgin, IL
Thomas L. Cao, MD is a hematology & oncology physician with a practice address in Elgin, Illinois, and NPI 1194797266, issued on Feb 3, 2006. Check the license (Illinois 036098274, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Thomas L. Cao
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 036098274 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1435 North Randall Road, Elgin, IL 60123
- Phone
- (847) 717-6860
- Enumerated
- Feb 3, 2006
- Record last updated
- Mar 25, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (847) 717-6872
- Medicaid ID
- 036098274 IL
- Medicare enrollment
- Enrolled (PECOS I20040629000035); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 666 in Illinois → Look up another NPI →
Verify Thomas L. Cao 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 036098274Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,674 Medicare Part D claims for 122 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium157 claims
- Metoprolol Succinate76 claims
- Pantoprazole Sodium68 claims
- Cephalexin64 claims
- Losartan Potassium59 claims
- Lisinopril57 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: $715.40
28 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 8,560 providers of this specialty with any payment received $7,481.41 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
- Stat Cardiologist IncSchaumburg, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas L. Cao among 666 hematology & oncology physician records in Illinois
Thomas L. Cao, MD is one of 666 hematology & oncology physician records with a practice address in Illinois. 84% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 57% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1983 · median 2003 among the 461 with a school on file
- Record last updated2019 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Illinois
There are 666 hematology & oncology physician records in Illinois.
All 666 in Illinois → Every provider in Elgin → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Apurva Desai, M.D.Elgin, IL 601231861468100
- Rajini Manjunath, MDElgin, IL 601231043207251
- Stanley Nabrinsky, MDElgin, IL 601231568459774
- Naushin Shareef, M.D.Elgin, IL 601231336377977
- Veerpal Singh, MBBS,M.D.Elgin, IL 601231295952596
- Chilakamarri Yeshwant, MDElgin, IL 601231518954890
- Syed Zahir, M.D.Elgin, IL 601231538156732
- Amaryllis Gil, MDElmhurst, IL 601261235116591
Common questions
What is Thomas L. Cao, MD's NPI number?
Thomas L. Cao, MD's National Provider Identifier (NPI) is 1194797266, issued on Feb 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas L. Cao, MD located?
The NPPES record lists a practice address at 1435 North Randall Road, Elgin, IL, 60123. Phone: (847) 717-6860. Providers update this record themselves, so call before visiting.
How can I verify Thomas L. Cao, MD's license?
NPPES lists Illinois license number 036098274, 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 Thomas L. Cao, MD prescribe under Medicare Part D?
In 2024, Thomas L. Cao, MD had 1,674 Medicare Part D claims for 122 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.