Warren Lam, MEDICAL DOCTOR
NPI 1114917143 · Diagnostic Radiology Physician · Pasadena, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Warren Lam, MEDICAL DOCTOR is a Diagnostic Radiology Physician provider in Pasadena, CA (NPI 1114917143).
Provider details
- NPI number
- 1114917143
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MEDICAL DOCTOR
- Sex
- Male
- Sole proprietor
- No
- License
- G76496 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
9,468 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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 4,746 | $9 |
| X-Ray of Chest, 2 Views71046 | 330 | $40 |
| Ct Scan Head Or Brain Without Contrast70450 | 298 | $43 |
| X-Ray of Abdomen, 1 View74018 | 254 | $10 |
| Mri Scan of Lower Spinal Canal Without Contrast72148 | 229 | $167 |
| X-Ray of Pelvis, 1-2 Views72170 | 187 | $9 |
| Complete Ultrasound Scan of Abdomen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$20 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
Registry dates
- Enumerated
- 2005-10-21
- Last updated
- 2014-10-21
Frequently asked questions
- What is Warren Lam's NPI number?
- Warren Lam's National Provider Identifier (NPI) is 1114917143, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Warren Lam's specialty?
- Warren Lam is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Warren Lam located?
- Warren Lam's practice location on file with NPPES is 100 W California Blvd, Pasadena, CA 91105-3010.
- What is Warren Lam's phone number?
- The practice phone number listed in the NPPES registry for Warren Lam is (626) 397-5139.
- Does Warren Lam accept Medicare?
- Warren Lam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Warren Lam's NPI active?
- Yes — Warren Lam's NPI (1114917143) is active in the NPPES registry as of the last update on 2014-10-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.