Alexandra Herrero Leon Guerrero, M.D.
NPI 1780020586ActiveIndividual· Surgery· Tamuning, GU
Surgery (M.D.) in Tamuning, Guam, trained at New York University School of Medicine (class of 2013). Mostly services rather than prescriptions: Medicare paid $45,951 for 169 patients in 2024, with only 48 Part D claims. Tempus Ai, Inc reported $111.33 in payments in 2024, mostly food and beverage.
Overview
| NPI | 1780020586 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 20, 2013 |
| Last updated in NPPES | Aug 27, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | M-2170 | GU |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - General Surgery (GU) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 169 |
|---|---|
| Services billed | 340 across 57 procedure codes |
| Paid by Medicare | $45,951 |
Part D prescriptions in 2024
| Prescriptions (claims) | 48 · 58 30-day fills |
|---|---|
| Patients | 24 |
| Total drug cost | $776.32 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | New York University School of Medicine |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | General Surgery |
Medical groups
- Guam Healthcare Development IncorporatedDededo, GU · 207 clinicians
- Hafa Specialist Group LLPTamuning, GU · 7 clinicians
Hospital affiliations
- Guam Memorial Hospital AuthorityTamuning, GU
- Guam Regional Medical CityDededo, GU
Industry payments (Open Payments)
- 2024$111.33 · 2 payments from 1 company
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Tempus Ai, Inc | $111.33 | 2 |
What the 2024 payments were for
- Food and Beverage$111.33 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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