Arleen Guerrero-Nieva, M.D.
NPI 1023024346ActiveIndividual· Internal Medicine· Long Beach, CA
Internal Medicine (M.D.) in Long Beach, California, licensed in CA, with an NPI issued in July 2006. Their prescriptions cost Medicare Part D more than their services did: $686,758 for 7,408 claims, against $25,932 paid for services in 2024. Boehringer Ingelheim Pharmaceuticals, Inc. was the largest of 8 companies reporting payments in 2025, $253.88 in all, mostly food and beverage. Lists Memorialcare Long Beach Medical Center as a hospital affiliation.
Overview
| NPI | 1023024346 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 31, 2006 |
| Last updated in NPPES | Oct 3, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A068932 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 80 |
|---|---|
| Services billed | 373 across 14 procedure codes |
| Paid by Medicare | $25,932 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,408 · 17,112 30-day fills |
|---|---|
| Patients | 401 |
| Total drug cost | $686,758 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 1983 |
|---|---|
| Medicare specialty | Internal Medicine |
Hospital affiliation
- Memorialcare Long Beach Medical CenterLong Beach, CA
Industry payments (Open Payments)
- 2025$253.88 · 10 payments from 8 companies
- 2024$255.23 · 10 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $54.15 | 2 |
| Mannkind Corporation | $42.50 | 1 |
| Kowa Pharmaceuticals America, Inc. | $37.90 | 2 |
| Bayer Healthcare Pharmaceuticals Inc. | $32.67 | 1 |
| Astrazeneca Pharmaceuticals LP | $28.21 | 1 |
What the 2025 payments were for
- Food and Beverage$211.38 · 9 payments
- Education$42.50 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine providers in Long Beach
- 1437875390
- 1912338963
- 1225264377
- 1649513961
- 1568767986
- 1356211122
- 1427721760
- 1871749259
- 1447345947
- 1679446629
- 1770544827
- 1891945598