Alexa Y. Chai, M.D.
NPI 1437393303ActiveIndividual· Urology· Los Alamitos, CA
Urology (M.D.) in Los Alamitos, California, trained at Mercer University School of Medicine (class of 2009). Their prescriptions cost Medicare Part D more than their services did: $400,897 for 3,613 claims, against $203,729 paid for services in 2024. Urogen Pharma, Inc. was the largest of 19 companies reporting payments in 2025, $1,414 in all, mostly food and beverage.
Overview
| NPI | 1437393303 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 23, 2009 |
| Last updated in NPPES | Aug 12, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Urology Primary | 208800000X | A131086 | 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 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 - Urology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 517 |
|---|---|
| Services billed | 5,381 across 54 procedure codes |
| Paid by Medicare | $203,729 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,613 · 8,010 30-day fills |
|---|---|
| Patients | 847 |
| Total drug cost | $400,897 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Mercer University School of Medicine |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Urology |
Medical group
- Marinelli and Feldman MdsFullerton, CA · 3 clinicians
Hospital affiliation
- Providence St. Jude Medical CenterFullerton, CA
Industry payments (Open Payments)
- 2025$1,414 · 49 payments from 19 companies
- 2024$518.83 · 26 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Urogen Pharma, Inc. | $229.15 | 9 |
| Histosonics, Inc. | $228.19 | 1 |
| Medtronic, Inc. | $161.00 | 7 |
| Astellas Pharma US Inc | $108.68 | 3 |
| Abbvie Inc. | $104.29 | 5 |
What the 2025 payments were for
- Food and Beverage$1,307 · 44 payments
- Education$106.78 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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