Barbara J. Maccollum, M.D.
NPI 1215925821ActiveIndividual· Internal Medicine, Gastroenterology· Phoenix, AZ
Internal Medicine, Gastroenterology (M.D.) in Phoenix, Arizona, trained at University of Arizona College of Medicine (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $413,689 for 1,325 claims, against $102,706 paid for services in 2024. Abbvie Inc. reported $22.56 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1215925821 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 7, 2005 |
| Last updated in NPPES | Feb 17, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 15579 | AZ |
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 (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 530 |
|---|---|
| Services billed | 948 across 22 procedure codes |
| Paid by Medicare | $102,706 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,325 · 2,489 30-day fills |
|---|---|
| Patients | 374 |
| Total drug cost | $413,689 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | University of Arizona College of Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Arizona Digestive Health PCSun City, AZ · 136 clinicians
Industry payments (Open Payments)
- 2025$22.56 · 1 payment from 1 company
- 2024$38.65 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $22.56 | 1 |
What the 2025 payments were for
- Food and Beverage$22.56 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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