Wei-Chung Chen, MD
NPI 1699066381 · Gastroenterology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wei-Chung Chen, MD is a Gastroenterology Physician provider in Los Angeles, CA (NPI 1699066381).
Provider details
- NPI number
- 1699066381
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A137336 (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
15 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
994 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) |
|---|---|---|
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 207 | $52 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 132 | $122 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 122 | $67 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 117 | $138 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 98 | $135 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 87 | 48 |
| Famotidine | 47 | 25 |
| Omeprazole | 27 | 15 |
| Adalimumabbrand: Humira(cf) Pen | 13 | — |
| Linaclotidebrand: Linzess | 12 | — |
| Dexlansoprazolebrand: Dexlansoprazole Dr | 11 | — |
| Cholestyramine (with Sugar)brand: Cholestyramine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$802 across 39 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
Registry dates
- Enumerated
- 2011-04-28
- Last updated
- 2017-06-19
Frequently asked questions
- What is Wei-Chung Chen's NPI number?
- Wei-Chung Chen's National Provider Identifier (NPI) is 1699066381, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wei-Chung Chen's specialty?
- Wei-Chung Chen is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Wei-Chung Chen located?
- Wei-Chung Chen's practice location on file with NPPES is 1520 San Pablo St, Los Angeles, CA 90033-5310.
- What is Wei-Chung Chen's phone number?
- The practice phone number listed in the NPPES registry for Wei-Chung Chen is (323) 442-5100.
- Does Wei-Chung Chen accept Medicare?
- Wei-Chung Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wei-Chung Chen's NPI active?
- Yes — Wei-Chung Chen's NPI (1699066381) is active in the NPPES registry as of the last update on 2017-06-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.