Mathangi R. Sekharan, MD
NPI 1518959329ActiveIndividual· Internal Medicine· Pleasant Prairie, WI
Internal Medicine (MD) with Froedtert South Inc, practicing in Pleasant Prairie, Wisconsin. Their prescriptions cost Medicare Part D more than their services did: $519,766 for 4,949 claims, against $124,248 paid for services in 2024. Dexcom, Inc. was the largest of 13 companies reporting payments in 2025, $799.59 in all, mostly food and beverage. Lists Advocate Condell Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1518959329 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Aug 17, 2005 |
| Last updated in NPPES | May 8, 2026 |
| Certified by provider | May 8, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 4230 | WI |
| Internal Medicine | 207R00000X | 036089529 | IL |
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); Practitioner - Internal Medicine (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 266 |
|---|---|
| Services billed | 1,837 across 30 procedure codes |
| Paid by Medicare | $124,248 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,949 · 12,289 30-day fills |
|---|---|
| Patients | 316 |
| Total drug cost | $519,766 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Froedtert South IncKenosha, WI · 161 clinicians
Hospital affiliations
- Advocate Condell Medical CenterLibertyville, IL
- Froedtert South Inc.Kenosha, WI
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- Northwestern Lake Forest HospitalLake Forest, IL
- Vista Medical Center EastWaukegan, IL
Other facilities
- Advocate Home Health Care ServHome health agency · Oakbrook, IL
Industry payments (Open Payments)
- 2025$799.59 · 39 payments from 13 companies
- 2024$432.10 · 21 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Dexcom, Inc. | $180.40 | 9 |
| Abbvie Inc. | $117.78 | 6 |
| Pfizer Inc. | $113.05 | 5 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $93.32 | 4 |
| Exact Sciences Corporation | $75.38 | 4 |
What the 2025 payments were for
- Food and Beverage$799.59 · 39 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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