Allen Chao
NPI 1952765034ActiveIndividual· Internal Medicine, Nephrology· Pasadena, CA
Internal Medicine, Nephrology in Pasadena, California, trained at Georgetown University School of Medicine (class of 2016). Their prescriptions cost Medicare Part D more than their services did: $280,341 for 916 claims, against $64,571 paid for services in 2024. E.R. Squibb & Sons, L.L.C. reported $121.81 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1952765034 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Apr 5, 2016 |
| Last updated in NPPES | Jul 30, 2026 |
| Certified by provider | Jul 30, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A154990 | 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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 235 |
|---|---|
| Services billed | 695 across 18 procedure codes |
| Paid by Medicare | $64,571 |
Part D prescriptions in 2024
| Prescriptions (claims) | 916 · 2,102 30-day fills |
|---|---|
| Patients | 152 |
| Total drug cost | $280,341 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | Georgetown University School of Medicine |
|---|---|
| Graduation year | 2016 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Pasadena Nephrology Corporation A Medical GroupPasadena, CA · 5 clinicians
Hospital affiliations
- Huntington HospitalPasadena, CA
- Kaiser Foundation Hospital - Los AngelesLos Angeles, CA
Other facilities
- Davita Huntington DialysisDialysis facility · Pasadena, CA
Industry payments (Open Payments)
- 2025$121.81 · 1 payment from 1 company
- 2024$22.91 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| E.R. Squibb & Sons, L.L.C. | $121.81 | 1 |
What the 2025 payments were for
- Food and Beverage$121.81 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 20 nephrologists in Pasadena · All nephrologists in California