Ian Guerrero, M.D.
NPI 1639604341ActiveIndividual· Internal Medicine· Kapolei, HI
Internal Medicine (M.D.) in Kapolei, Hawaii, licensed in HI, with an NPI issued in May 2017. Their prescriptions cost Medicare Part D more than their services did: $2,641,318 for 7,028 claims, against $19,835 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 13 companies reporting payments in 2025, $4,641 in all, mostly food and beverage. Lists Pali Momi Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1639604341 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 1, 2017 |
| Last updated in NPPES | Jul 3, 2024 |
| Certified by provider | Jul 3, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 21171 | HI |
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 - Internal Medicine (HI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 81 |
|---|---|
| Services billed | 208 across 13 procedure codes |
| Paid by Medicare | $19,835 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,028 · 16,400 30-day fills |
|---|---|
| Patients | 740 |
| Total drug cost | $2,641,318 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliations
- Pali Momi Medical CenterAiea, HI
- The Queens Medical CenterHonolulu, HI
Other facilities
- Careresource HawaiiHome health agency · Honolulu, HI
Industry payments (Open Payments)
- 2025$4,641 · 173 payments from 13 companies
- 2024$5,049 · 197 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $1,136 | 36 |
| Amgen Inc. | $751.35 | 27 |
| Insmed, Inc. | $492.76 | 23 |
| Novo Nordisk Inc | $447.86 | 17 |
| Bayer Healthcare Pharmaceuticals Inc. | $353.80 | 16 |
What the 2025 payments were for
- Food and Beverage$4,641 · 173 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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