Amy Guan, MS, APN
NPI 1801398813ActiveIndividual· Nurse Practitioner, Gerontology· Saint Louis, MO
Nurse Practitioner, Gerontology (MS, APN) with Mercy Clinic East Communities, practicing in Saint Louis, Missouri. Their prescriptions cost Medicare Part D more than their services did: $216,741 for 1,892 claims, against $62,112 paid for services in 2024. Lilly USA, LLC was the largest of 20 companies reporting payments in 2025, $2,126 in all, mostly food and beverage. Lists Mercy Hospital Jefferson and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1801398813 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MS, APN |
| Sole proprietor | No |
| NPI issued | Mar 6, 2018 |
| Last updated in NPPES | Sep 11, 2023 |
| Certified by provider | Sep 11, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Gerontology Primary | 363LG0600X | 2023012036 | MO |
| Nurse Practitioner, Primary Care | 363LP2300X | 209016579 | IL |
| Nurse Practitioner, Primary Care | 363LP2300X | 2023014672 | MO |
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 (IL); Practitioner - Nurse Practitioner (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 224 |
|---|---|
| Services billed | 1,701 across 42 procedure codes |
| Paid by Medicare | $62,112 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,892 · 3,416 30-day fills |
|---|---|
| Patients | 469 |
| Total drug cost | $216,741 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2017 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Mercy Clinic East CommunitiesSaint Louis, MO · 571 clinicians
Hospital affiliations
- Mercy Hospital JeffersonCrystal City, MO
- Mercy Hospital SouthSaint Louis, MO
- Mercy Hospital St LouisSaint Louis, MO
Industry payments (Open Payments)
- 2025$2,126 · 131 payments from 20 companies
- 2024$2,271 · 124 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $328.65 | 21 |
| Novo Nordisk Inc | $269.24 | 15 |
| Astrazeneca Pharmaceuticals LP | $258.61 | 16 |
| Otsuka America Pharmaceutical, Inc. | $196.50 | 12 |
| Abbvie Inc. | $188.65 | 11 |
What the 2025 payments were for
- Food and Beverage$2,126 · 131 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 117 gerontology nurse practitioners in Saint Louis · All gerontology nurse practitioners in Missouri