Carmen Ka Man Yung, FNP-BC
NPI 1003475450ActiveIndividual· Nurse Practitioner· Walnut Creek, CA
Nurse Practitioner (FNP-BC) with John Muir Physician Network, practicing in Walnut Creek, California. Their prescriptions cost Medicare Part D more than their services did: $96,464 for 684 claims, against $46,091 paid for services in 2024. Janssen Biotech, Inc. was the largest of 12 companies reporting payments in 2025, $2,148 in all, mostly food and beverage. Lists John Muir Medical Center - Concord Campus and 1 other hospital as hospital affiliations.
Overview
| NPI | 1003475450 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | FNP-BC |
| Sole proprietor | Yes |
| NPI issued | Jun 10, 2019 |
| Last updated in NPPES | May 9, 2022 |
| Certified by provider | May 9, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | NP95012996 | CA |
| Nurse Practitioner, Family | 363LF0000X | 95012996 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 386 |
|---|---|
| Services billed | 527 across 15 procedure codes |
| Paid by Medicare | $46,091 |
Part D prescriptions in 2024
| Prescriptions (claims) | 684 · 1,016 30-day fills |
|---|---|
| Patients | 480 |
| Total drug cost | $96,464 |
| Generic share | 77% of claims |
Education and affiliations
| Graduation year | 2017 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- John Muir Physician NetworkPleasant Hill, CA · 494 clinicians
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
Industry payments (Open Payments)
- 2025$2,148 · 103 payments from 12 companies
- 2024$2,503 · 87 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $546.66 | 30 |
| Abbvie Inc. | $470.29 | 17 |
| Lilly USA, LLC | $271.26 | 15 |
| Aimmune Therapeutics, Inc. | $243.48 | 10 |
| Takeda Pharmaceuticals U.S.A., Inc. | $155.55 | 9 |
What the 2025 payments were for
- Food and Beverage$2,148 · 103 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Nurse Practitioner providers in Walnut Creek
- 1013418326
- 1174890305
- 1487083655
- 1619622479
- 1609462845
- 1700618998
- 1427062975
- 1437660321
- 1679192561
- 1952696684
- 1851834410
- 1588716971