Quick answers
- Does Darren P. Lum accept Medicare assignment?
- Yes. Medicare's clinician data says Darren P. Lum accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Darren P. Lum see?
- In 2024, CMS data shows 778 Original Medicare patients and 1,015 services for Darren P. Lum. This counts Original Medicare only and measures volume, not quality.
- What is Darren P. Lum's NPI number?
- 1528011806. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Darren P. Lum, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 778 |
|---|---|
| Services billed to Medicare | 1,015 |
| Different services or procedures | 60 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Mri scan of abdomen before and after contrast (74183)289 services
- X-ray of chest, 1 view (71045)268 services
- Mri scan of pelvis before and after contrast (72197)69 services
- X-ray of abdomen, 1 view (74018)55 services
- X-ray of chest, 2 views (71046)36 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease49%
- Diabetes47%
- Arthritis36%
- Ischemic heart disease34%
Hospitals where Darren P. Lum works
Medicare's Facility Affiliation Data lists Darren P. Lum at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- PIH Health Downey HospitalDowney, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050393
- PIH Health Good Samaritan HospitalLos Angeles, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: not listed by Medicare · CCN 050471
- PIH Health Hospital-WhittierWhittier, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050169
- Stanford Health CareStanford, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050441
- The Queens Medical CenterHonolulu, HI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 120001
Practice locations
Addresses where Darren P. Lum is enrolled with Medicare (CMS data updated October 2, 2026).
- 11500 Brookshire AveDowney, CA 90241 (562) 904‑5000
- 1225 Wilshire BlvdLos Angeles, CA 90017 (888) 927‑8024
- 300 Pasteur DrStanford, CA 94305 (650) 723‑4000
- 938 Clark Ave, Apt 11Mountain View, CA 94040 (808) 542‑9560
Group practices
Medicare enrollment lists Darren P. Lum as a member of these groups (CMS data updated October 2, 2026).
- Stanford Health Care3,122 clinicians in the group
- Queens University Medical Group614 clinicians in the group
- Lambert Radiology Medical Group Inc67 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Downey
Clinicians with the same Medicare primary specialty in Downey, CA — not a recommendation.
Other clinicians in Stanford Health Care
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1528011806 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians