You-Jen Chou, MD
NPI 1104070887 · Gastroenterology Physician · Irvine, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
You-Jen Chou, MD is a Gastroenterology Physician provider in Irvine, CA (NPI 1104070887).
Provider details
- NPI number
- 1104070887
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A111307 (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
17 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
385 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 | 131 | $144 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 80 | $82 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 62 | $131 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 40 | $187 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 32 | $266 |
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 |
|---|---|---|
| Omeprazole | 183 | 76 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 80 | 76 |
| Pantoprazole Sodium | 80 | 34 |
| Esomeprazole Magnesium | 67 | 27 |
| Dexlansoprazolebrand: Dexlansoprazole Dr | 53 | 18 |
| Famotidine | 45 | 13 |
| Dicyclomine Hcl | 25 | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,008 across 40 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)
- 2100 Main St Ste 300Huntington Beach, CA 92648-2489Phone: (714) 252-9415Fax: (714) 963-8407
Registry dates
- Enumerated
- 2008-11-08
- Last updated
- 2026-05-05
- Certified
- 2026-05-05
Frequently asked questions
- What is You-Jen Chou's NPI number?
- You-Jen Chou's National Provider Identifier (NPI) is 1104070887, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is You-Jen Chou's specialty?
- You-Jen Chou is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is You-Jen Chou located?
- You-Jen Chou's practice location on file with NPPES is 1000 Fivepoint, Irvine, CA 92618-2621.
- What is You-Jen Chou's phone number?
- The practice phone number listed in the NPPES registry for You-Jen Chou is (800) 826-4673.
- Does You-Jen Chou accept Medicare?
- You-Jen Chou is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is You-Jen Chou's NPI active?
- Yes — You-Jen Chou's NPI (1104070887) is active in the NPPES registry as of the last update on 2026-05-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.