Mark C. Jacobson, M.D
NPI 1124059076ActiveIndividual· Allergy & Immunology· Hinsdale, IL
Allergy & Immunology (M.D) in Hinsdale, Illinois, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $130,840 for 387 claims, against $58,645 paid for services in 2024. Genzyme Corporation was the largest of 17 companies reporting payments in 2025, $4,037 in all, mostly food and beverage.
Overview
| NPI | 1124059076 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | No |
| NPI issued | Jul 6, 2006 |
| Last updated in NPPES | Feb 26, 2020 |
| Certified by provider | Feb 26, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | 036084954 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Allergy/Immunology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 80 |
|---|---|
| Services billed | 2,540 across 23 procedure codes |
| Paid by Medicare | $58,645 |
Part D prescriptions in 2024
| Prescriptions (claims) | 387 · 653 30-day fills |
|---|---|
| Patients | 69 |
| Total drug cost | $130,840 |
| Generic share | 66% of claims |
Education and affiliations
| Medical school | University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Allergy/Immunology |
| Telehealth | Offers telehealth |
Industry payments (Open Payments)
- 2025$4,037 · 83 payments from 17 companies
- 2024$1,973 · 83 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $2,051 | 8 |
| Csl Behring | $352.57 | 10 |
| Regeneron Healthcare Solutions, Inc. | $282.93 | 8 |
| Glaxosmithkline, LLC. | $243.89 | 12 |
| Astrazeneca Pharmaceuticals LP | $237.58 | 11 |
What the 2025 payments were for
- Food and Beverage$2,269 · 81 payments
- Consulting Fee$1,719 · 1 payment
- Travel and Lodging$49.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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