Mark Steven Sugar, M.D.
NPI 1013959253ActiveIndividual· Allergy & Immunology, Allergy· Laguna Niguel, CA
Allergy & Immunology, Allergy (M.D.) in Laguna Niguel, California, trained at University of Maryland School of Medicine (class of 1969). Their prescriptions cost Medicare Part D more than their services did: $227,669 for 814 claims, against $77,689 paid for services in 2024. Regeneron Healthcare Solutions, Inc. was the largest of 13 companies reporting payments in 2025, $854.31 in all, mostly food and beverage.
Overview
| NPI | 1013959253 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 12, 2006 |
| Last updated in NPPES | Jul 11, 2025 |
| Certified by provider | Jul 11, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology, Allergy Primary | 207KA0200X | C032628 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Allergy/Immunology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 119 |
|---|---|
| Services billed | 3,105 across 27 procedure codes |
| Paid by Medicare | $77,689 |
Part D prescriptions in 2024
| Prescriptions (claims) | 814 · 1,235 30-day fills |
|---|---|
| Patients | 149 |
| Total drug cost | $227,669 |
| Generic share | 53% of claims |
Education and affiliations
| Medical school | University of Maryland School of Medicine |
|---|---|
| Graduation year | 1969 |
| Medicare specialty | Allergy/Immunology |
Medical group
- Allergy and Asthma Associates of Southern Calif IncMission Viejo, CA · 6 clinicians
Industry payments (Open Payments)
- 2025$854.31 · 41 payments from 13 companies
- 2024$613.71 · 24 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Healthcare Solutions, Inc. | $198.58 | 10 |
| Genzyme Corporation | $174.09 | 10 |
| Glaxosmithkline, LLC. | $97.72 | 4 |
| Takeda Pharmaceuticals U.S.A., Inc. | $81.58 | 3 |
| Azurity Pharmaceuticals, Inc. | $67.75 | 3 |
What the 2025 payments were for
- Food and Beverage$854.31 · 41 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Allergy & Immunology, Allergy providers in Laguna Niguel
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