Lisa Chen, M.D.
NPI 1861835928 · Emergency Medicine Physician · Fontana, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lisa Chen, M.D. is a Emergency Medicine Physician provider in Fontana, CA (NPI 1861835928).
Provider details
- NPI number
- 1861835928
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 1861835928 (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
13 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
56 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) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 41 | $119 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 15 | $173 |
Typical Medicare-allowed amounts for these services range $119–$173 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 37 | 37 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 36 | 36 |
| Azithromycin | 34 | 34 |
| Ciprofloxacin Hcl | 30 | 29 |
| Cefuroxime Axetilbrand: Cefuroxime | 30 | 30 |
| Cefpodoxime Proxetil | 29 | 28 |
| Ondansetronbrand: Ondansetron Odt | 28 | 28 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$28 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
- 2013-04-09
- Last updated
- 2021-12-21
- Certified
- 2021-12-21
Frequently asked questions
- What is Lisa Chen's NPI number?
- Lisa Chen's National Provider Identifier (NPI) is 1861835928, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lisa Chen's specialty?
- Lisa Chen is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Lisa Chen located?
- Lisa Chen's practice location on file with NPPES is 9961 Sierra Ave, Fontana, CA 92335-6720.
- What is Lisa Chen's phone number?
- The practice phone number listed in the NPPES registry for Lisa Chen is (909) 427-5000.
- Does Lisa Chen accept Medicare?
- Lisa Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lisa Chen's NPI active?
- Yes — Lisa Chen's NPI (1861835928) is active in the NPPES registry as of the last update on 2021-12-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.