Robert A. Mecum, M.D.
NPI 1114945680ActiveIndividual· Internal Medicine, Gastroenterology· Whittier, CA
Internal Medicine, Gastroenterology (M.D.) in Whittier, California, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $136,997 for 720 claims, against $40,058 paid for services in 2024. Pfizer Inc. was the largest of 9 companies reporting payments in 2025, $1,869 in all, mostly food and beverage.
Overview
| NPI | 1114945680 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 17, 2006 |
| Last updated in NPPES | Aug 9, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | G78258 | CA |
| Specialist | 174400000X | G78258 | 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 | 149 |
|---|---|
| Services billed | 383 across 15 procedure codes |
| Paid by Medicare | $40,058 |
Part D prescriptions in 2024
| Prescriptions (claims) | 720 · 1,160 30-day fills |
|---|---|
| Patients | 426 |
| Total drug cost | $136,997 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Industry payments (Open Payments)
- 2025$1,869 · 51 payments from 9 companies
- 2024$1,817 · 52 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $496.39 | 19 |
| Braintree Laboratories, Inc. | $356.97 | 14 |
| Madrigal Pharmaceuticals | $300.00 | 2 |
| Ardelyx, Inc. | $261.34 | 6 |
| Aimmune Therapeutics, Inc. | $158.12 | 2 |
What the 2025 payments were for
- Food and Beverage$1,869 · 51 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 16 gastroenterologists in Whittier · All gastroenterologists in California