William D. Welsh, D.O.
NPI 1568401255ActiveIndividual· Internal Medicine, Geriatric Medicine· Whittier, CA
Internal Medicine, Geriatric Medicine (D.O.) in Whittier, California, trained at Des Moines University of Osteopathic Medicine and Health Sciences (class of 1976). Their prescriptions cost Medicare Part D more than their services did: $2,403,858 for 18,661 claims, against $99,699 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 19 companies reporting payments in 2025, $1,548 in all, mostly food and beverage.
Overview
| NPI | 1568401255 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Jun 6, 2006 |
| Last updated in NPPES | Sep 1, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Geriatric Medicine Primary | 207RG0300X | 20A4272 | CA |
| Family Medicine | 207Q00000X | 20A4272 | 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 - Family Practice (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 331 |
|---|---|
| Services billed | 3,064 across 71 procedure codes |
| Paid by Medicare | $99,699 |
Part D prescriptions in 2024
| Prescriptions (claims) | 18,661 · 37,406 30-day fills |
|---|---|
| Patients | 982 |
| Total drug cost | $2,403,858 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | Des Moines University of Osteopathic Medicine and Health Sciences |
|---|---|
| Graduation year | 1976 |
| Medicare specialty | Family Practice |
| Secondary specialties | Geriatric Medicine |
| Telehealth | Offers telehealth |
Medical group
- Maguire and Welsh Medical GroupWhittier, CA · 4 clinicians
Hospital affiliation
- Pih Health Hospital-WhittierWhittier, CA
Other facilities
- Emc Home Health Providers, IncHome health agency · La Palma, CA
- Presbyterian Intercommunity Hospital Home HealthHome health agency · La Mirada, CA
- Care Dimensions HealthcareHospice · Corona, CA
- Reliance Hospice and Palliative CareHospice · Cerritos, CA
- Socal Post-Acute CareNursing home · Whittier, CA
Industry payments (Open Payments)
- 2025$1,548 · 70 payments from 19 companies
- 2024$1,616 · 80 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $196.19 | 11 |
| Lilly USA, LLC | $141.18 | 6 |
| Otsuka America Pharmaceutical, Inc. | $131.08 | 6 |
| Amgen Inc. | $127.89 | 6 |
| Pfizer Inc. | $120.12 | 5 |
What the 2025 payments were for
- Food and Beverage$1,548 · 70 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other geriatricians in Whittier
- 1609789403