Chad Walter Mayer, DO
NPI 1467423855ActiveIndividual· Allergy & Immunology, Allergy· Farmington Hills, MI
Allergy & Immunology, Allergy (DO) in Farmington Hills, Michigan, trained at Michigan State University College of Osteopathic Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $82,036 for 195 claims, against $12,230 paid for services in 2024. Ars Pharmaceuticals Operations, Inc. was the largest of 20 companies reporting payments in 2025, $21,342 in all, mostly speaking and faculty fees.
Overview
| NPI | 1467423855 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | Yes |
| NPI issued | Feb 1, 2006 |
| Last updated in NPPES | Feb 28, 2020 |
| Certified by provider | Feb 28, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology, Allergy Primary | 207KA0200X | 5101013420 | MI |
| Pediatrics | 208000000X | 5101013420 | 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 | 49 |
|---|---|
| Services billed | 964 across 16 procedure codes |
| Paid by Medicare | $12,230 |
Part D prescriptions in 2024
| Prescriptions (claims) | 195 · 323 30-day fills |
|---|---|
| Patients | 51 |
| Total drug cost | $82,036 |
| Generic share | 55% of claims |
Education and affiliations
| Medical school | Michigan State University College of Osteopathic Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Allergy/Immunology |
| Secondary specialties | Pediatric Medicine |
Medical group
- Allergy and Asthma Institute of Se MichiganFarmington Hills, MI · 2 clinicians
Industry payments (Open Payments)
- 2025$21,342 · 157 payments from 20 companies
- 2024$1,811 · 89 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ars Pharmaceuticals Operations, Inc. | $18,328 | 37 |
| Csl Behring | $572.62 | 20 |
| Genzyme Corporation | $542.30 | 21 |
| Astrazeneca Pharmaceuticals LP | $467.18 | 26 |
| Regeneron Healthcare Solutions, Inc. | $317.21 | 12 |
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$14,800 · 7 payments
- Food and Beverage$3,788 · 140 payments
- Travel and Lodging$2,631 · 8 payments
- Education$123.14 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records