Karthik Subbu, M.D.

NPI 1760974950ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Geneva, IL

Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) in Geneva, Illinois, trained at Eastern Virginia Medical School (class of 2018). Their prescriptions cost Medicare Part D more than their services did: $963,746 for 2,101 claims, against $106,618 paid for services in 2024. Amgen Inc. was the largest of 2 companies reporting payments in 2025, $252.43 in all, mostly food and beverage.

Overview

NPI	1760974950
Status	Active
Entity type	Individual
Credential	M.D.
Sole proprietor	No
NPI issued	Jun 4, 2018
Last updated in NPPES	Dec 20, 2023
Certified by provider	Dec 20, 2023

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Endocrinology, Diabetes & Metabolism Primary	207RE0101X	036164909	IL
Student in an Organized Health Care Education/Training Program	390200000X	11019958A	IN

About license numbers in NPPES

Exclusion screening

List	Result	Details
HHS-OIG LEIE · Nov 10, 2026	No match	Checked by NPI and by name + state
North Carolina Medicaid · Nov 11, 2026	No match	—
New York OMIG · Nov 11, 2026	No match	—
Ohio Medicaid · Nov 11, 2026	No match	—
Pennsylvania Medicheck · Nov 11, 2026	No match	—
Washington HCA · Nov 11, 2026	No match	—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)	Enrolled Practitioner - Internal Medicine (IL)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	291
Services billed	3,004 across 30 procedure codes
Paid by Medicare	$106,618

Part D prescriptions in 2024

Prescriptions (claims)	2,101 · 4,328 30-day fills
Patients	408
Total drug cost	$963,746
Generic share	34% of claims

Medicare sources and data years

Education and affiliations

Medical school	Eastern Virginia Medical School
Graduation year	2018
Medicare specialty	Internal Medicine
Secondary specialties	Endocrinology
Telehealth	Offers telehealth