Karthik Subbu, M.D.
Endocrinology, Diabetes & Metabolism Physician · Geneva, IL
Karthik Subbu, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Geneva, Illinois, and NPI 1760974950, issued on Jun 4, 2018. Check the license (Illinois 036164909, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Karthik Subbu
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 036164909 IL
11019958A IN
Self-reported in NPPES; status is on the state search - Practice location
- 302 Randall RD Ste 304, Geneva, IL 60134
- Phone
- (630) 208-6775
- Enumerated
- Jun 4, 2018
- Record last updated
- Dec 20, 2023
- Fax
- (630) 208-7937
- Medicare enrollment
- Enrolled (PECOS I20230817003191); accepts Medicare assignment
- Medical or professional school
- Eastern Virginia Medical School, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 436 in Illinois → Look up another NPI →
Verify Karthik Subbu 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 036164909Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
2,101 Medicare Part D claims for 408 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 58% of claims.
Most prescribed
- Levothyroxine Sodium253 claims
- Ozempic170 claims
- Lantus Solostar155 claims
- Trulicity109 claims
- Metformin Hcl80 claims
- Metformin Hcl Er76 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.
The MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Central Dupage Physician GroupGeneva, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karthik Subbu among 436 endocrinology, diabetes & metabolism physician records in Illinois
Karthik Subbu, M.D. is one of 436 endocrinology, diabetes & metabolism physician records with a practice address in Illinois. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 82% of them.
- NPI issued2018 · 82% of these records are older, 14% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2018 · median 2006 among the 295 with a school on file
- Record last updated2023 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Illinois
There are 436 endocrinology, diabetes & metabolism physician records in Illinois.
All 436 in Illinois → Every provider in Geneva → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Steven Bielski, M.D.Geneva, IL 601341144227570
- Elisa Hofmann, M.D.Geneva, IL 601341043217490
- Tiffany Karas, MDGeneva, IL 601341013993336
- Zeenat Parveen, M.D.Geneva, IL 601341912099060
- Demetra Rupp, M.D.Geneva, IL 601341518131903
- Hafsa Amjed, M.DGlen Ellyn, IL 601371104272798
- Winnie Nhan, DOGlen Ellyn, IL 601371245681709
- Nasrin Azad, MDHines, IL 601411831270909
Common questions
What is Karthik Subbu, M.D.'s NPI number?
Karthik Subbu, M.D.'s National Provider Identifier (NPI) is 1760974950, issued on Jun 4, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Karthik Subbu, M.D. located?
The NPPES record lists a practice address at 302 Randall RD Ste 304, Geneva, IL, 60134. Phone: (630) 208-6775. Providers update this record themselves, so call before visiting.
How can I verify Karthik Subbu, M.D.'s license?
NPPES lists Illinois license number 036164909, 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 Karthik Subbu, M.D. prescribe under Medicare Part D?
In 2024, Karthik Subbu, M.D. had 2,101 Medicare Part D claims for 408 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Karthik Subbu, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.