Lillian Chen, M.D.
NPI 1386919454 · Internal Medicine Physician · Torrance, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lillian Chen, M.D. is a Internal Medicine Physician provider in Torrance, CA (NPI 1386919454).
Provider details
- NPI number
- 1386919454
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A128859 (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
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,477 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 473 | $86 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 236 | $50 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 226 | $117 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 168 | $17 |
| Admn Sarscov2 Vacc 1 Dose90480 | 83 | $47 |
| Administration of Influenza Virus Vaccine |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 70 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 536 | 146 |
| Amlodipine Besylate | 239 | 73 |
| Losartan Potassium | 192 | 57 |
| Levothyroxine Sodium | 170 | 45 |
| Rosuvastatin Calcium | 112 | 37 |
| Metformin Hclbrand: Metformin Hcl Er | 97 | 31 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$41 across 2 records (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 (1)
- 514 N Prospect Ave Ste 103Redondo Beach, CA 90277-3037Phone: (310) 937-8555
Registry dates
- Enumerated
- 2012-03-21
- Last updated
- 2024-10-18
- Certified
- 2024-10-18
Frequently asked questions
- What is Lillian Chen's NPI number?
- Lillian Chen's National Provider Identifier (NPI) is 1386919454, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lillian Chen's specialty?
- Lillian Chen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Lillian Chen located?
- Lillian Chen's practice location on file with NPPES is 3500 Lomita Blvd, Torrance, CA 90505-5021.
- What is Lillian Chen's phone number?
- The practice phone number listed in the NPPES registry for Lillian Chen is (310) 257-0028.
- Does Lillian Chen accept Medicare?
- Lillian Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lillian Chen's NPI active?
- Yes — Lillian Chen's NPI (1386919454) is active in the NPPES registry as of the last update on 2024-10-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.