Maria Jesusa Buan Tan, FNP
NPI 1770098527ActiveIndividual· Nurse Practitioner, Family· Chatsworth, CA
Nurse Practitioner, Family (FNP) with Healthcare Partners Affiliates Medical Group and 1 other group, practicing in Chatsworth, California. Part D covered 811 prescriptions written in 2024, 59% of them generic. Dexcom, Inc. was the largest of 4 companies reporting payments in 2025, $529.64 in all, mostly food and beverage.
Overview
| NPI | 1770098527 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | FNP |
| Sole proprietor | No |
| NPI issued | Dec 1, 2017 |
| Last updated in NPPES | Jan 12, 2026 |
| Certified by provider | Jan 12, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | 95007997 | CA |
| Registered Nurse | 163W00000X | 725854 | 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) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 811 · 818 30-day fills |
|---|---|
| Patients | 106 |
| Total drug cost | $123,356 |
| Generic share | 59% of claims |
Education and affiliations
| Graduation year | 2017 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical groups
- Healthcare Partners Affiliates Medical GroupAnaheim, CA · 754 clinicians
- Horizon Multicare Group IncLancaster, CA · 28 clinicians
Industry payments (Open Payments)
- 2025$529.64 · 4 payments from 4 companies
- 2024$236.54 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Dexcom, Inc. | $157.84 | 1 |
| Novo Nordisk Inc | $125.00 | 1 |
| Corcept Therapeutics | $124.98 | 1 |
| Astellas Pharma US Inc | $121.82 | 1 |
What the 2025 payments were for
- Food and Beverage$529.64 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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