William D. Birenbaum, M.D.
NPI 1407876550ActiveIndividual· Internal Medicine· Saint Louis, MO
Internal Medicine (M.D.) in Saint Louis, Missouri, trained at University of Missouri, Columbia School of Medicine (class of 1982). Their prescriptions cost Medicare Part D more than their services did: $951,808 for 14,134 claims, against $164,237 paid for services in 2024. Pfizer Inc. reported $18.81 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1407876550 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 20, 2006 |
| Last updated in NPPES | Feb 12, 2021 |
| Certified by provider | Feb 12, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 36460 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 393 |
|---|---|
| Services billed | 2,911 across 35 procedure codes |
| Paid by Medicare | $164,237 |
Part D prescriptions in 2024
| Prescriptions (claims) | 14,134 · 31,554 30-day fills |
|---|---|
| Patients | 815 |
| Total drug cost | $951,808 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of Missouri, Columbia School of Medicine |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Physician Groups LcFarmington, MO · 521 clinicians
- Aging Well Health Care, LLCSaint Louis, MO · 238 clinicians
Hospital affiliations
- Barnes Jewish HospitalSaint Louis, MO
- Barnes-Jewish West County HospitalCreve Coeur, MO
- Mercy Hospital St LouisSaint Louis, MO
- Missouri Baptist Medical CenterSaint Louis, MO
- St Lukes HospitalChesterfield, MO
Other facilities
- Bjc Home Care ServicesHome health agency · Saint Louis, MO
- Fv at Home By Friendship VillageHome health agency · Chesterfield, MO
- Bjc HospiceHospice · Saint Louis, MO
- Ssm Health Rehabilitation HospitalInpatient rehabilitation facility · Richmond Heights, MO
Industry payments (Open Payments)
- 2025$18.81 · 1 payment from 1 company
- 2024$577.47 · 30 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $18.81 | 1 |
What the 2025 payments were for
- Food and Beverage$18.81 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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