Daisy Chacko Thomas, MD
Internal Medicine Physician · Belvidere, IL
Daisy Chacko Thomas, MD is an internal medicine physician with a practice address in Belvidere, Illinois, and NPI 1407854169, issued on Jul 7, 2005. Check the license (Illinois 036111218, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Daisy Chacko Thomas
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036111218 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1669 Belvidere RD, Belvidere, IL 61008
- Phone
- (815) 971-3030
- Enumerated
- Jul 7, 2005
- Record last updated
- Jan 16, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (815) 971-9895
- Medicaid ID
- 036111218 IL
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Verify Daisy Chacko Thomas 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 036111218Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average internal medicine physician in 2024
89 Medicare Part D claims for 16 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Lisinopril16 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.
Daisy Chacko Thomas among 7,238 internal medicine physician records in Illinois
Daisy Chacko Thomas, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2015 · 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).
4 internal medicine physician records list a practice address in Belvidere
They are 4 of the 194 NPPES records with a practice address in Belvidere, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Belvidere → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Shobha Iyengar, M.D.Belvidere, IL 610081891724241
- Anthony Molinari, MDBelvidere, IL 610081043290158
- Jaime Sanz, MDBelvidere, IL 610081508937772
- Jessey Mathew, MDCherry Valley, IL 610161639751860
- Pranjal Agrawal, M.D.Dixon, IL 610211174723290
- Dorothy Bennett, MDDixon, IL 610211053998229
- Philippa Devenney, M.D.Dixon, IL 610211518189083
- Eric Gale, M.D.Dixon, IL 610211093802944
Common questions
What is Daisy Chacko Thomas, MD's NPI number?
Daisy Chacko Thomas, MD's National Provider Identifier (NPI) is 1407854169, issued on Jul 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Daisy Chacko Thomas, MD located?
The NPPES record lists a practice address at 1669 Belvidere RD, Belvidere, IL, 61008. Phone: (815) 971-3030. Providers update this record themselves, so call before visiting.
How can I verify Daisy Chacko Thomas, MD's license?
NPPES lists Illinois license number 036111218, 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 Daisy Chacko Thomas, MD prescribe under Medicare Part D?
In 2024, Daisy Chacko Thomas, MD had 89 Medicare Part D claims for 16 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.