Kevin Khai Tuan Tieu, MD
NPI 1154397768ActiveIndividual· Obstetrics & Gynecology· Fountain Valley, CA
Obstetrics & Gynecology (MD) in Fountain Valley, California, trained at Pennsylvania State University College of Medicine (class of 2000). In 2024 Medicare paid $57,378 for 204 patients, and Part D covered 669 of their prescriptions, 76% of them generic. Sumitomo Pharma America, Inc. was the largest of 11 companies reporting payments in 2025, $2,219 in all, mostly food and beverage.
Overview
| NPI | 1154397768 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Feb 23, 2006 |
| Last updated in NPPES | May 30, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | A77268 | 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 - Obstetrics/Gynecology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 204 |
|---|---|
| Services billed | 611 across 21 procedure codes |
| Paid by Medicare | $57,378 |
Part D prescriptions in 2024
| Prescriptions (claims) | 669 · 1,396 30-day fills |
|---|---|
| Patients | 259 |
| Total drug cost | $85,928 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | Pennsylvania State University College of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Obstetrics/Gynecology |
Hospital affiliation
- Memorialcare Orange Coast Medical CenterFountain Valley, CA
Industry payments (Open Payments)
- 2025$2,219 · 87 payments from 11 companies
- 2024$8,915 · 69 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Sumitomo Pharma America, Inc. | $503.35 | 17 |
| Mayne Pharma Commercial LLC | $438.75 | 13 |
| Biogen, Inc. | $428.30 | 24 |
| Astellas Pharma US Inc | $228.17 | 6 |
| Millicent US Inc | $221.24 | 13 |
What the 2025 payments were for
- Food and Beverage$2,120 · 86 payments
- Education$99.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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