Essam R. Quraishi, MD
NPI 1902952690ActiveIndividual· Internal Medicine, Gastroenterology· Santa Ana, CA
Internal Medicine, Gastroenterology (MD) with Caduceus Physicians Medical Group and 2 other groups, practicing in Santa Ana, California. Their prescriptions cost Medicare Part D more than their services did: $1,000,113 for 1,409 claims, against $77,835 paid for services in 2024. Abbvie Inc. was the largest of 10 companies reporting payments in 2025, $980.58 in all, mostly food and beverage. Lists Orange County Global Medical Center as a hospital affiliation.
Overview
| NPI | 1902952690 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jan 26, 2007 |
| Last updated in NPPES | Oct 25, 2024 |
| Certified by provider | Oct 25, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | C133332 | CA |
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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 338 |
|---|---|
| Services billed | 714 across 16 procedure codes |
| Paid by Medicare | $77,835 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,409 · 2,374 30-day fills |
|---|---|
| Patients | 486 |
| Total drug cost | $1,000,113 |
| Generic share | 78% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical groups
- Caduceus Physicians Medical GroupYorba Linda, CA · 22 clinicians
- Anchor Medical GroupYorba Linda, CA · 20 clinicians
- Gastrointestinal and Liver Consultants IncIrvine, CA · 2 clinicians
Hospital affiliation
- Orange County Global Medical CenterSanta Ana, CA
Industry payments (Open Payments)
- 2025$980.58 · 44 payments from 10 companies
- 2024$891.08 · 37 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $629.46 | 29 |
| Janssen Biotech, Inc. | $95.00 | 4 |
| Madrigal Pharmaceuticals | $55.32 | 2 |
| Ardelyx, Inc. | $47.07 | 2 |
| Pfizer Inc. | $44.10 | 2 |
What the 2025 payments were for
- Food and Beverage$980.58 · 44 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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