Mark Marshall Millar, M.D.
NPI 1962627802ActiveIndividual· Allergy & Immunology· Grand Rapids, MI
Allergy & Immunology (M.D.) in Grand Rapids, Michigan, trained at Northwestern University Feinberg Medical School (class of 1993). Their prescriptions cost Medicare Part D more than their services did: $337,076 for 2,498 claims, against $23,528 paid for services in 2024. Takeda Pharmaceuticals U.S.A., Inc. reported $27.52 in payments in 2025, mostly education.
Overview
| NPI | 1962627802 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 16, 2007 |
| Last updated in NPPES | May 14, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | 4301071401 | MI |
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 - Allergy/Immunology (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 124 |
|---|---|
| Services billed | 2,533 across 18 procedure codes |
| Paid by Medicare | $23,528 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,498 · 4,193 30-day fills |
|---|---|
| Patients | 407 |
| Total drug cost | $337,076 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Allergy/Immunology |
| Secondary specialties | Internal Medicine |
Hospital affiliations
- Mercy Health Saint Mary'sGrand Rapids, MI
- Spectrum HealthGrand Rapids, MI
Industry payments (Open Payments)
- 2025$27.52 · 2 payments from 1 company
- 2024$33.84 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | $27.52 | 2 |
What the 2025 payments were for
- Education$27.52 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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