Grammy Huayhua, FNP
NPI 1043853732ActiveIndividual· Nurse Practitioner, Family· Rowland Heights, CA
Nurse Practitioner, Family (FNP) with Southern California Permanente Medical Group and 1 other group, practicing in Rowland Heights, California. Their prescriptions cost Medicare Part D more than their services did: $10,460 for 437 claims, against $4,661 paid for services in 2024. Abbvie Inc. reported $14.36 in payments in 2025, mostly food and beverage. Lists Whittier Hospital Medical Center as a hospital affiliation.
Overview
| NPI | 1043853732 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | FNP |
| Sole proprietor | Yes |
| NPI issued | Oct 24, 2019 |
| Last updated in NPPES | May 5, 2022 |
| Certified by provider | May 5, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | NP95011255 | 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 | 59 |
|---|---|
| Services billed | 62 across 7 procedure codes |
| Paid by Medicare | $4,661 |
Part D prescriptions in 2024
| Prescriptions (claims) | 437 · 464 30-day fills |
|---|---|
| Patients | 303 |
| Total drug cost | $10,460 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 2018 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical groups
- Southern California Permanente Medical GroupRedlands, CA · 11,293 clinicians
- Gem Medical Group CorporationSouth El Monte, CA · 57 clinicians
Hospital affiliation
- Whittier Hospital Medical CenterWhittier, CA
Industry payments (Open Payments)
- 2025$14.36 · 1 payment from 1 company
- 2024$169.70 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $14.36 | 1 |
What the 2025 payments were for
- Food and Beverage$14.36 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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