Devalingam Mahalingam, M.D.
NPI 1164650859ActiveIndividual· Internal Medicine, Medical Oncology· Chicago, IL
Internal Medicine, Medical Oncology (M.D.) with Northwestern Medical Faculty Foundation, practicing in Chicago, Illinois. In 2024 Medicare paid $2,137,764 for 384 patients, and Part D covered 194 of their prescriptions, 63% of them generic. E.R. Squibb & Sons, L.L.C. was the largest of 3 companies reporting payments in 2025, $27,574 in all, mostly speaking and faculty fees. Lists Northwestern Lake Forest Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1164650859 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 1, 2009 |
| Last updated in NPPES | Jul 21, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | 036-142503 | IL |
| Internal Medicine | 207R00000X | P1668 | TX |
| Internal Medicine, Medical Oncology | 207RX0202X | P1668 | TX |
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 - Hematology/Oncology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 384 |
|---|---|
| Services billed | 90,056 across 131 procedure codes |
| Paid by Medicare | $2,137,764 |
Part D prescriptions in 2024
| Prescriptions (claims) | 194 · 222 30-day fills |
|---|---|
| Patients | 52 |
| Total drug cost | $618,713 |
| Generic share | 63% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
Hospital affiliations
- Northwestern Lake Forest HospitalLake Forest, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Medicine Delnor Community HospitalGeneva, IL
- Northwestern Memorial HospitalChicago, IL
- Palos Community HospitalPalos Heights, IL
Industry payments (Open Payments)
- 2025$27,574 · 27 payments from 3 companies
- 2024$24,065 · 23 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| E.R. Squibb & Sons, L.L.C. | $21,185 | 11 |
| Exelixis Inc. | $4,970 | 9 |
| Eli Lilly and Company | $1,419 | 7 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$16,835 · 5 payments
- Consulting Fee$3,420 · 1 payment
- Honoraria$3,300 · 1 payment
- Travel and Lodging$3,249 · 7 payments
- Food and Beverage$679.71 · 12 payments
- Education$89.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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