Wencheng Jen, M.D.
NPI 1811915481 · Internal Medicine Physician · Arcadia, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wencheng Jen, M.D. is a Internal Medicine Physician provider in Arcadia, CA (NPI 1811915481).
Provider details
- NPI number
- 1811915481
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A70481 (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
19 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
1,303 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 311 | $190 |
| Chronic Care Management Services for Two Or More Chronic Conditions, First 30 Minutes Provided Personally By Health Care Professional, Per Calendar Month99491 | 286 | $90 |
| Complex Chronic Care Management Services for Two Or More Chronic Conditions, First 60 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99487 | 247 | $146 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 133 | $67 |
| Complex Chronic Care Management Services for Two Or More Chronic Conditions, Each Additional 60 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99489 | 131 | $78 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 63 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 276 | 66 |
| Losartan Potassium | 175 | 41 |
| Amlodipine Besylate | 137 | 36 |
| Montelukast Sodium | 107 | 32 |
| Lisinopril | 91 | 22 |
| Levothyroxine Sodium | 81 | 16 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-18
- Last updated
- 2026-01-28
- Certified
- 2026-01-28
Frequently asked questions
- What is Wencheng Jen's NPI number?
- Wencheng Jen's National Provider Identifier (NPI) is 1811915481, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wencheng Jen's specialty?
- Wencheng Jen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Wencheng Jen located?
- Wencheng Jen's practice location on file with NPPES is 817 S 1st Ave Unit a, Arcadia, CA 91006-3918.
- What is Wencheng Jen's phone number?
- The practice phone number listed in the NPPES registry for Wencheng Jen is (626) 416-3051.
- Does Wencheng Jen accept Medicare?
- Wencheng Jen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wencheng Jen's NPI active?
- Yes — Wencheng Jen's NPI (1811915481) is active in the NPPES registry as of the last update on 2026-01-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.