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DR. YOU-JEN CHOU MD
NPI 1104070887
Internal Medicine - Gastroenterology in Irvine, CA

Active since November 08, 2008PECOS EnrolledAccepts Medicare Assignment
100/100
CMS Quality Rating
1000 FIVEPOINT, IRVINE, CA 92618(800) 826-4673 Get Directions Write a Review

NPPES record last updated: May 5, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. You-jen Chou Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. YOU-JEN CHOU MD (NPI 1104070887) is an individual gastroenterology provider in Irvine, California, licensed in California (A111307) and active in the NPI registry since November 2008. He is enrolled in Medicare PECOS, maintains a secondary practice location in Huntington Beach, and is a graduate of Boston University School Of Medicine (2008).

NPPES Registry Identity

NPI1104070887
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. YOU-JEN CHOUCredential: MD
Location Address1000 FIVEPOINTIrvine, CA 92618-2621
Mailing AddressPo Box 512185Los Angeles, CA 90051-0185
Phone(800) 826-4673
Sole ProprietorYes
Medical School CMSBoston University School Of MedicineGraduated 2008
Enumeration DateNovember 8, 2008
Last NPPES UpdateMay 5, 2026
NPPES CertifiedMay 5, 2026
✔ NPI 1104070887 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CA · A111307
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
1000 FIVEPOINT, Irvine, CA 92618
Open in Google Maps ↗

Other Names 1

Professional Name (2)Jim You-jen Chou Md

Secondary Practice Location 1

Location 12100 Main St Ste 300Huntington Beach, CA 92648-2489 · Phone (714) 252-9415 · Fax (714) 963-8407

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. You-jen Chou Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6901072248
PECOS Enrollment IDI20120109000079
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show You-jen Chou reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

United Medical Doctors
33 mi
Gastroenterology
28078 BAXTER RD STE 530
Murrieta, CA 92563
  • Reassigned Medicare billing, California enrollment
  • 240 clinicians in this Medicare group
NPI 1770559981 (951) 566-5229
City Of Hope Medical Foundation
36 mi
Hematology & Oncology
1500 DUARTE RD
Duarte, CA 91010
  • Reassigned Medicare billing, California enrollment
  • 1,335 clinicians in this Medicare group
NPI 1871886366 (626) 256-4673

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 7

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
131 services77 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
80 services80 patients
Biopsy of large bowel using a flexible endoscope 45380
A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.
62 services61 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
40 services40 patients
Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
32 services32 patients
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm 43249
This procedure involves using a flexible tube with a camera, called an endoscope, to gently expand narrowed areas in your esophagus, stomach, or upper small bowel. A small balloon is inflated, making it easier for food and liquid to pass through. It's safe and effective.
21 services19 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92618 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ARNOLD KIM MD
Anesthesiology
1000 FIVEPOINT
IRVINE, CA 92618
Orange County (888) 333-4673
DR. AMY RUTH COPELAND MD
Surgery (Surgical Oncology)
1000 FIVEPOINT, BLDG A
IRVINE, CA 92618
Orange County (949) 671-8000
MRS. AMBER HARDY RICKNER NP
Nurse Practitioner (Acute Care)
1000 FIVEPOINT
IRVINE, CA 92618
Orange County (949) 671-4673
CAROLYN THOMPSON CHUDY DO
Physical Medicine & Rehabilitation (Sports Medicine)
1000 FIVEPOINT
IRVINE, CA 92618
Orange County (800) 826-4673
DR. NGOC N. LE
Radiology (Vascular & Interventional Radiology)
1000 FIVEPOINT
IRVINE, CA 92618
Orange County (800) 826-4673
DR. ANNIE CHEN MD
Internal Medicine (Pulmonary Disease)
1000 FIVEPOINT
IRVINE, CA 92618
Orange County (800) 826-4673
DR. HOSSEIN MEHDIKHANI KARIMABAD M.D.
Radiology (Diagnostic Radiology)
1000 FIVEPOINT
IRVINE, CA 92618
Orange County (847) 342-6842
DR. JUNG WOOK KIM MD
Internal Medicine (Pulmonary Disease)
1000 FIVEPOINT
IRVINE, CA 92618
Orange County (888) 333-4673

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is You-jen Chou's NPI number?

The NPI number for You-jen Chou is 1104070887. It was assigned to this individual provider in the NPPES registry on November 8, 2008. The provider is also known as Jim You-Jen Chou MD.

Where is You-jen Chou located?

You-jen Chou practices at 1000 Fivepoint, Irvine, CA 92618. The listed phone number is (800) 826-4673.

What is You-jen Chou's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is You-jen Chou enrolled in Medicare?

Yes. You-jen Chou is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for You-jen Chou's services?

According to the CMS Revalidation Reassignment List (October 2026 release), You-jen Chou reassigns Medicare benefits to 2 organizations: United Medical Doctors (Murrieta, CA) and City Of Hope Medical Foundation (Duarte, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for You-jen Chou's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for You-jen Chou was last updated on May 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.