Lex Chen, M.D.
NPI 1265607956 · Hospitalist Physician · Sylmar, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lex Chen, M.D. is a Hospitalist Physician provider in Sylmar, CA (NPI 1265607956).
Provider details
- NPI number
- 1265607956
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A110087 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
11 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 11 | $84 |
Typical Medicare-allowed amounts for these services range $84–$84 (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 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levofloxacin | 26 | 26 |
| Metoprolol Tartrate | 25 | 16 |
| Prednisone | 25 | 25 |
| Pantoprazole Sodium | 22 | 14 |
| Furosemide | 21 | 18 |
| Ciprofloxacin Hcl | 20 | 20 |
| Carvedilol | 15 | — |
| Clopidogrel Bisulfate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-04-24
- Last updated
- 2024-03-14
- Certified
- 2024-03-14
Frequently asked questions
- What is Lex Chen's NPI number?
- Lex Chen's National Provider Identifier (NPI) is 1265607956, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lex Chen's specialty?
- Lex Chen is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Lex Chen located?
- Lex Chen's practice location on file with NPPES is 14445 Olive View Dr, Sylmar, CA 91342-1437.
- What is Lex Chen's phone number?
- The practice phone number listed in the NPPES registry for Lex Chen is (818) 364-3205.
- Does Lex Chen accept Medicare?
- Lex Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lex Chen's NPI active?
- Yes — Lex Chen's NPI (1265607956) is active in the NPPES registry as of the last update on 2024-03-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.