Michael S. Zimmerman, M.D.
NPI 1871601302ActiveIndividual· Specialist· Las Vegas, NV
Specialist (M.D.) with Osama Haikal MD Ltd, practicing in Las Vegas, Nevada. Their prescriptions cost Medicare Part D more than their services did: $896,841 for 1,777 claims, against $224,445 paid for services in 2024. Abbvie Inc. was the largest of 19 companies reporting payments in 2025, $2,654 in all, mostly food and beverage. Lists Mountainview Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1871601302 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 25, 2006 |
| Last updated in NPPES | May 13, 2020 |
| Certified by provider | May 13, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | 7539 | NV |
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 - Gastroenterology (NV) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 918 |
|---|---|
| Services billed | 2,066 across 26 procedure codes |
| Paid by Medicare | $224,445 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,777 · 2,872 30-day fills |
|---|---|
| Patients | 755 |
| Total drug cost | $896,841 |
| Generic share | 77% of claims |
Education and affiliations
| Graduation year | 1989 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Osama Haikal MD LtdLas Vegas, NV · 10 clinicians
Hospital affiliations
- Mountainview HospitalLas Vegas, NV
- Summerlin Hospital Medical CenterLas Vegas, NV
Industry payments (Open Payments)
- 2025$2,654 · 122 payments from 19 companies
- 2024$2,301 · 121 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $640.50 | 29 |
| Janssen Biotech, Inc. | $606.47 | 32 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $271.30 | 14 |
| Genzyme Corporation | $229.78 | 12 |
| Madrigal Pharmaceuticals | $181.76 | 2 |
What the 2025 payments were for
- Food and Beverage$2,539 · 120 payments
- Education$115.00 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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