Joan C. Bull, M.D.
NPI 1558389791ActiveIndividual· Internal Medicine· Houston, TX
Internal Medicine (M.D.) in Houston, Texas, trained at Stanford University School of Medicine (class of 1966). Their prescriptions cost Medicare Part D more than their services did: $92,425 for 437 claims, against $6,063 paid for services in 2024.
Overview
| NPI | 1558389791 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 17, 2006 |
| Last updated in NPPES | Apr 24, 2026 |
| Certified by provider | Apr 24, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | F8811 | TX |
| Internal Medicine, Medical Oncology | 207RX0202X | F8811 | TX |
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 - Hematology/Oncology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 38 |
|---|---|
| Services billed | 76 across 12 procedure codes |
| Paid by Medicare | $6,063 |
Part D prescriptions in 2024
| Prescriptions (claims) | 437 · 933 30-day fills |
|---|---|
| Patients | 51 |
| Total drug cost | $92,425 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Stanford University School of Medicine |
|---|---|
| Graduation year | 1966 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
Medical group
- Ut PhysiciansHouston, TX · 1,765 clinicians
Hospital affiliations
- Harris HealthHouston, TX
- Memorial Hermann Hospital SystemHouston, TX
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 1,983 internal medicine physicians in Houston · All internal medicine physicians in Texas