Stephen Lui, M.D.
NPI 1891770384 · Nephrology Physician · Lynwood, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Provider details
- NPI number
- 1891770384
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A87511 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
5 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
450 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 71 | $77 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 60 | $9 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 51 | $69 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 43 | $116 |
| Urine Microalbumin (protein) Level82043 | 42 | $6 |
| Creatine Measurement82540 | 42 | $5 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Calcium Acetate | 69 | 23 |
| Hydralazine Hcl | 56 | 19 |
| Sevelamer Carbonate | 53 | 14 |
| Amlodipine Besylate | 42 | 18 |
| Furosemide | 41 | 13 |
| Sucroferric Oxyhydroxidebrand: Velphoro | 34 | — |
| Losartan Potassium | 26 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$23 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (4)
- 11180 Warner Ave Ste 353Fountain Valley, CA 92708-7516Phone: (714) 406-0185Fax: (310) 763-7573
- 18785 Brookhurst St Ste 200Fountain Valley, CA 92708-7300Phone: (714) 824-2610Fax: (434) 423-4550
- 1974 Santa Fe AveLong Beach, CA 90810-4064Phone: (562) 595-9799Fax: (434) 423-4550
- 31001 Rancho Viejo Rd Ste 100aSan Juan Capistrano, CA 92675-8704Phone: (714) 824-2610Fax: (434) 423-4550
Registry dates
- Enumerated
- 2005-12-07
- Last updated
- 2022-07-08
- Certified
- 2022-06-29
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.