Maureen Ursula Welker, MSN, NPC, CCRN
NPI 1386608438ActiveIndividual· Nurse Practitioner, Family· Mission Viejo, CA
Nurse Practitioner, Family (MSN, NPC, CCRN) with Oso Specialty Infusion Inc, practicing in Mission Viejo, California. In 2024 Medicare paid $886,473 for 102 patients, and Part D covered 70 of their prescriptions, 83% of them generic. Janssen Biotech, Inc. was the largest of 2 companies reporting payments in 2025, $115.44 in all, mostly food and beverage.
Overview
| NPI | 1386608438 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MSN, NPC, CCRN |
| Sole proprietor | No |
| NPI issued | Apr 14, 2006 |
| Last updated in NPPES | Nov 11, 2021 |
| Certified by provider | Nov 11, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | 10596 | CA |
| Nurse Practitioner, Family | 363LF0000X | RN390049 | 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 - Nurse Practitioner (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 102 |
|---|---|
| Services billed | 92,824 across 30 procedure codes |
| Paid by Medicare | $886,473 |
Part D prescriptions in 2024
| Prescriptions (claims) | 70 · 148 30-day fills |
|---|---|
| Patients | 35 |
| Total drug cost | $92,813 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Oso Specialty Infusion IncIrvine, CA · 9 clinicians
Industry payments (Open Payments)
- 2025$115.44 · 3 payments from 2 companies
- 2024$423.55 · 13 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $57.91 | 1 |
| Abbvie Inc. | $57.53 | 2 |
What the 2025 payments were for
- Food and Beverage$115.44 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 54 family nurse practitioners in Mission Viejo · All family nurse practitioners in California