Denise Lam Mah, FNP-BC
NPI 1083114508ActiveIndividual· Nurse Practitioner, Family· Fontana, CA
Nurse Practitioner, Family (FNP-BC) with City of Hope Medical Foundation, practicing in Fontana, California. In 2024 Medicare paid $29,802 for 66 patients, and Part D covered 61 of their prescriptions, 85% of them generic. Smith+nephew, Inc. was the largest of 4 companies reporting payments in 2025, $151.85 in all, mostly food and beverage.
Overview
| NPI | 1083114508 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | FNP-BC |
| Sole proprietor | Yes |
| NPI issued | Feb 21, 2018 |
| Last updated in NPPES | May 24, 2021 |
| Certified by provider | May 24, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | 95008068 | CA |
| Registered Nurse, Enterostomal Therapy | 163WE0900X | 95008068 | 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 | 66 |
|---|---|
| Services billed | 510 across 20 procedure codes |
| Paid by Medicare | $29,802 |
Part D prescriptions in 2024
| Prescriptions (claims) | 61 · 65 30-day fills |
|---|---|
| Patients | 21 |
| Total drug cost | $5,922 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2017 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- City of Hope Medical FoundationDuarte, CA · 982 clinicians
Industry payments (Open Payments)
- 2025$151.85 · 6 payments from 4 companies
- 2024$137.91 · 6 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Smith+nephew, Inc. | $54.14 | 2 |
| Hollister Incorporated | $42.15 | 2 |
| Solventum Corporation | $28.24 | 1 |
| Convatec Inc. | $27.32 | 1 |
What the 2025 payments were for
- Food and Beverage$151.85 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 70 family nurse practitioners in Fontana · All family nurse practitioners in California