Mark Chun-Liang Lee, MD
NPI 1558322479ActiveIndividual· Internal Medicine, Nephrology· Whittier, CA
Internal Medicine, Nephrology (MD) in Whittier, California, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $1,128,055 for 4,007 claims, against $220,706 paid for services in 2024. Ardelyx, Inc. was the largest of 5 companies reporting payments in 2025, $589.62 in all, mostly food and beverage.
Overview
| NPI | 1558322479 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Mar 30, 2006 |
| Last updated in NPPES | Jul 20, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A68664 | CA |
| Internal Medicine | 207R00000X | A68664 | 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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 205 |
|---|---|
| Services billed | 1,110 across 14 procedure codes |
| Paid by Medicare | $220,706 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,007 · 5,843 30-day fills |
|---|---|
| Patients | 283 |
| Total drug cost | $1,128,055 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Nephrology |
Hospital affiliations
- Memorialcare Long Beach Medical CenterLong Beach, CA
- Pih Health Hospital-WhittierWhittier, CA
- Whittier Hospital Medical CenterWhittier, CA
Other facilities
- Davita Bellflower Dialysis CenterDialysis facility · Bellflower, CA
- Davita Cerritos DialysisDialysis facility · Cerritos, CA
- Davita Firestone Blvd DialysisDialysis facility · Norwalk, CA
- Davita Paramount Dialysis CenterDialysis facility · Paramount, CA
- Davita Santa Fe Springs DialysisDialysis facility · Whittier, CA
Industry payments (Open Payments)
- 2025$589.62 · 39 payments from 5 companies
- 2024$696.86 · 41 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ardelyx, Inc. | $275.93 | 14 |
| Astrazeneca Pharmaceuticals LP | $178.92 | 19 |
| Akebia Therapeutics Inc | $63.03 | 3 |
| Novartis Pharmaceuticals Corporation | $50.40 | 2 |
| Fresenius USA Marketing, Inc. | $21.34 | 1 |
What the 2025 payments were for
- Food and Beverage$589.62 · 39 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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