Mark T. Claus, M.D.
NPI 1518910686ActiveIndividual· Allergy & Immunology, Allergy· Brockton, MA
Allergy & Immunology, Allergy (M.D.) in Brockton, Massachusetts, trained at Boston University School of Medicine (class of 1982). Their prescriptions cost Medicare Part D more than their services did: $1,080,934 for 3,149 claims, against $378,025 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 23 companies reporting payments in 2025, $2,904 in all, mostly food and beverage.
Overview
| NPI | 1518910686 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 18, 2006 |
| Last updated in NPPES | Feb 4, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology, Allergy Primary | 207KA0200X | 59634 | MA |
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 (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 398 |
|---|---|
| Services billed | 15,542 across 23 procedure codes |
| Paid by Medicare | $378,025 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,149 · 6,203 30-day fills |
|---|---|
| Patients | 449 |
| Total drug cost | $1,080,934 |
| Generic share | 63% of claims |
Education and affiliations
| Medical school | Boston University School of Medicine |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Allergy/Immunology |
| Telehealth | Offers telehealth |
Medical group
- Asthma and Allergy Physicians LLCBrockton, MA · 8 clinicians
Hospital affiliations
- Milford Regional Medical CenterMilford, MA
- Signature Healthcare Brockton HospitalBrockton, MA
Industry payments (Open Payments)
- 2025$2,904 · 150 payments from 23 companies
- 2024$2,454 · 134 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $889.82 | 57 |
| Novartis Pharmaceuticals Corporation | $259.70 | 15 |
| Regeneron Healthcare Solutions, Inc. | $243.89 | 13 |
| Glaxosmithkline, LLC. | $217.33 | 10 |
| Genzyme Corporation | $198.86 | 6 |
What the 2025 payments were for
- Food and Beverage$2,789 · 147 payments
- Education$114.93 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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