Maher Tama, M.D.
NPI 1326393737ActiveIndividual· Internal Medicine, Gastroenterology· Walnut Creek, CA
Internal Medicine, Gastroenterology (M.D.) with Faculty Physicians and Surgeons of Llusm and 3 other groups, practicing in Walnut Creek, California. Their prescriptions cost Medicare Part D more than their services did: $177,635 for 482 claims, against $51,835 paid for services in 2024. Olympus America Inc. reported $19.77 in payments in 2025, mostly food and beverage. Lists John Muir Medical Center - Concord Campus and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1326393737 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 23, 2012 |
| Last updated in NPPES | Jan 20, 2026 |
| Certified by provider | Jan 20, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A161762 | CA |
| Internal Medicine | 207R00000X | A161762 | 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); Practitioner - Gastroenterology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 355 |
|---|---|
| Services billed | 568 across 49 procedure codes |
| Paid by Medicare | $51,835 |
Part D prescriptions in 2024
| Prescriptions (claims) | 482 · 937 30-day fills |
|---|---|
| Patients | 184 |
| Total drug cost | $177,635 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical groups
- Faculty Physicians and Surgeons of LlusmLoma Linda, CA · 1,315 clinicians
- Loyola University Medical CenterMaywood, IL · 953 clinicians
- John Muir Physician NetworkPleasant Hill, CA · 494 clinicians
- Chaparral Medical Group IncPomona, CA · 65 clinicians
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- Loma Linda University Medical CenterLoma Linda, CA
- Loyola Gottlieb Memorial HospitalMelrose Park, IL
- Loyola University Medical CenterMaywood, IL
- Riverside University Health System-Medical CenterMoreno Valley, CA
Industry payments (Open Payments)
- 2025$19.77 · 1 payment from 1 company
- 2024$34.57 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Olympus America Inc. | $19.77 | 1 |
What the 2025 payments were for
- Food and Beverage$19.77 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 41 gastroenterologists in Walnut Creek · All gastroenterologists in California